Question about 2002 Chevrolet Cavalier Coupe

12 Answers

Black soot on plugs. cooling fan runs all the time misfires

2002 cavalier 2.4 5-speed. changed plugs,throttle position sensor,temp sensor ,coil pack cover. Emits black soot from tail pipe. idles rough up and down. Egr valve is not on this engine that I swaped out of another. Their wasn't one on it either I also have no wiring to be found for a egr sensor if their was one. I changed the air charge temp sensor as well. Ran the best when I removed the air intake completly.Can figure it out also shows a 171 code . Replaced the first 02 sensor. didn't help. Does not show a 406 code

Posted by on

  • 13 more comments 
  • David Fowler Dec 30, 2008

    already did that

  • David Fowler Dec 30, 2008

    I changed the map sensor no difference

  • David Fowler Dec 30, 2008

    Changed the throttle body replaced the air idle sensor no vacume leaks. Still runs the same

  • David Fowler Dec 30, 2008

    I.ve done everything suggested except air box. Really dont see that being it but will try. No soot in water. All plugs are black soot Identical looking. No plug looks any different from the other. I.ve unplugged all the injectors one at a time and didn't see a difference between one cylinder to the other. Just a small change in each I'm thinking ecm might be bad. I can't figure out any other reason that the cooling fan would run constantly. I changed that water temp sensor also. As soon as you start the car it comes on. A/C is turned off. I had to unplug the fuse for the cooling fan because the bottom radiator hose would never warm up at all. Thought maybe the water pump was bad . But after unpluging the fuse it did heat up no overheating or anything. plugged it back in fan came on for a couple seconds then kicked off for a second or two. Then came right back on & the check engine light came on. Have installed new fuel pump & fuel filter also with no change. On the coldest day we have had I finished changing the fuel pump. It ran great & thought I had solved the problem. Then after five minutes idle started to drop as it should then it started it's stip & sputter ruteen again with the black soot out the tail pipe. Spit & sputter in all thottle levels them. Ecm sound right to you ? Never had to change one out before. but if its the reason for the cooling fan running all the time maybe it's the reason for the idling & misfiring problem also. Sound reasonable ? And why would the egr valve be missing from the motor & no wires found for it. No codes in computer being given for it. Just 171 & 300.

  • David Fowler Dec 30, 2008

    I.ve done everything suggested except air box. Really dont see that being it but will try. No soot in water. All plugs are black soot Identical looking. No plug looks any different from the other. I.ve unplugged all the injectors one at a time and didn't see a difference between one cylinder to the other. Just a small change in each I'm thinking ecm might be bad. I can't figure out any other reason that the cooling fan would run constantly. I changed that water temp sensor also. As soon as you start the car it comes on. A/C is turned off. I had to unplug the fuse for the cooling fan because the bottom radiator hose would never warm up at all. Thought maybe the water pump was bad . But after unpluging the fuse it did heat up no overheating or anything. plugged it back in fan came on for a couple seconds then kicked off for a second or two. Then came right back on & the check engine light came on. Have installed new fuel pump & fuel filter also with no change. On the coldest day we have had I finished changing the fuel pump. It ran great & thought I had solved the problem. Then after five minutes idle started to drop as it should then it started it's stip & sputter ruteen again with the black soot out the tail pipe. Spit & sputter in all thottle levels them. Ecm sound right to you ? Never had to change one out before. but if its the reason for the cooling fan running all the time maybe it's the reason for the idling & misfiring problem also. Sound reasonable ? And why would the egr valve be missing from the motor & no wires found for it. No codes in computer being given for it. Just 171 & 300.

  • David Fowler Dec 31, 2008

    Replaced the map senor. It did make the cooling fan run as it should but the stumble of the engine continues. I ran it hard on the highway and it seems that in each gear just when your rev to the highest point to shift gears it stumbles to almost no power. If you press on it suddenly powers on as it should. It always stumbles though. & rough idles. If you shut it off then restart it. It runs good at 1000 rpm's then when it drops around 850 rpm's it begins rough running again. Did that several times in the garage then finally got a 171 code again. David

  • David Fowler Dec 31, 2008

    pvc has been changed. air filter changed, all hoses tight. just went through 3 cans of carb & brake cleaner jacked up car sprayed everywhere I could couldn't hear a change any where sprayed around injectors & intake all over houseing. nothing !

  • David Fowler Dec 31, 2008

    NO water in tank. Removed tank replaced pump & have put gas in $10.00 at a time 3 times now

  • David Fowler Dec 31, 2008

    Thought fixya could help ! Guess not !

  • David Fowler Jan 02, 2009

    I just realized that I wrote on my first post that the EGR valve is missing off of the engine & the wiring for it is no where to be found. No one every reponded to that question. So is that my whole problem ? And if so where would I find the wire ends that have been cut. David

  • David Fowler Jan 02, 2009

    You never answered the question I just asked about the egr which is missing off the engine.

  • David Fowler Jan 02, 2009

    Is this computer activated & a machine is reading this 1 Question . Why is the ERG VALVE MISSING FROM THE MOTOR ??? THAT IS MY QUESTION !!!!!!!!!!

  • David Fowler Jan 02, 2009

    Would like too know the answer to my last question

  • David Fowler Jan 02, 2009

    Would like to know about my last question. Anyone out their !!!!!!!!

  • David Fowler Jan 02, 2009

    This FIXYA site is a joke. I will never use this service again. Thumbs down !!!

×

12 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Chevrolet Master
  • 2,039 Answers

Did you check the gas pressure if the return line is block the gas pressure would be to high that would be our symtom if you need to put a fuel gauge on it and check it out around 40psi or our pressure regulator its leaking let me now pierre

Posted on Jan 02, 2009

  • 1 more comment 
  • pierre laplante Jan 02, 2009

    ive seen those pressure regulator leak remove the vacuum line on it and check if you got gas coming from the vacuum pipe pierre

  • pierre laplante Jan 02, 2009

    there no egr valve on a quad 4 engine that why you dont see it pierre

  • pierre laplante Jan 02, 2009

    its manly all the same wire harness on those differente option other engine but same harness for all of them sorry i did not respond sooner just say our post pierre

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 1,990 Answers

Did you buy this Car Used? If so, Someone had a Problem Before and Removed it! There should be wires going to the Computer Via one of the Many Bundles under the Hood. This is Critical to having the Computer Read and Respond to the Correct Codes that the Equipment sends to it.

Posted on Jan 02, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Chevrolet Master
  • 19,396 Answers

If you want to work on the car at this level , get the haynes manual with all diagrams for your car: Haynes - Practical Manuals, Books and DVD

Posted on Jan 02, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,239 Answers

Hi
you need ot do a tune up, these problems are ussually associated with bad wires and coil packs...

Posted on Jan 02, 2009

  • 2 more comments 
  • ABHISHEK.C
    ABHISHEK.C Jan 02, 2009

    Yoy need a new head gasket. I have done quite a few on these cars. Does it run rough for few seconds, when you start it in a.m.? If so, head gasket is gone.


  • ABHISHEK.C
    ABHISHEK.C Jan 02, 2009

    The fuel injectors, they are either shorted in which case you need to replace them, or in most cases dirty and mo amount of in the tank cleaners can do it. you need to have them professinally cleaned where the fuell pump is disabled and the truck is actually running on the chemical cleaner. We used to use BG products best stuff I ever seen brought many a car back to life I have used and seen the MOTOR VAC system a cannot say it compares to the BG system. Someone will need to determin if any injectors are shorted or dead and replace them and if thats the case just take em all out and have them ultrasonically cleaned they will give you a before flow report and an after cleaning report.
    If this information is helpfl please give a good rating and by all means please visit my website and check out the BLOG AND FAQ read all the fuel injector problems .
    Thanak you fowlerdavid
    www.aceautomotive1.com 



  • ABHISHEK.C
    ABHISHEK.C Jan 02, 2009

    Very common on Ford engines with EGR valve is the tube inside the intake manifold that takes unburned exhaust gasses and recirculates them back into the engine for reburning,the tube becomes restricted from hydrocarbons and just plugs up.The intake manifold and tube has to be removed and thoroughly cleaned.

  • ABHISHEK.C
    ABHISHEK.C Jan 02, 2009

    The EGR valve is located next to the TPS connector. It has two bolts holding it in place. You will need to replace the gasket when you take it off.

    AND DONT TELL FIXYA AS JOKE,,,,,,,SOME PEOPLE DONT KNOW CORRECT SOLUTION......NOT ALL..PLEASE UNDERSTAND IT

    with regards


×

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Novelist:

    An expert who has written 50 answers of more than 400 characters.

    Governor:

    An expert whose answer got voted for 20 times.

  • Expert
  • 83 Answers

I have a suggestion that has not yet been mentioned. Nobody has mentioned you may need a valve adjustment. If your intake valves are tight you will get the "black soot" coming from the exhaust and no matter what you do you will not get rid of it until you adjust the tight intake valves. They will throw off all the sensors and the car will run rough constantly. You will actually experience possible overheating problems because the valves are not allowing the engine to burn the fuel properly. I have not adjusted the valves on this particular engine but I would highly recommend you checking them because the problem is classic tight valve issue. You actually do a compression check but I still say check the valves, you may even have a burnt valve. Have you tried pulling the plug wires one at a time with the engine running to determine if you have a specific cylinder dead or cold? This often helps you narrow down the issue and where you need to look. I'm thinking your valves may be hydraulic but they too can be adjusted or you may still have a burnt valve.
Please don't give up on FixYa, there are many smart people here and everyone wants to help. I have some tricks up my sleeve and this is my first crack at your problem. Perhaps if we can communicate a little more I may be able to help you find your problem. There is an answer, we just need to find it.
I hope to hear back from you!
Regards,
RSelvy

Posted on Dec 31, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 199 Answers

On Benimur's post:
"Pls check the hydrovac. Better yet temporarily remove and plug the vacuum hose leading to the hydrovac. There would normally be a PCV like device, white plastic where the vacuum hose enters."

The "hydrovac" would be the brake booster and the |PCV like device" would be the check valve.

Hope this helps.

Posted on Dec 31, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Expert
  • 142 Answers

Maybe you need to take this to a professional so they can take a physical look of the vehicle. Its difficult to provide a diagnosis from behind a computer.

Posted on Dec 31, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 8,147 Answers

Water in tha gas tank

Posted on Dec 31, 2008

  • Dan Webster
    Dan Webster Dec 31, 2008

    Get some non foulers and put them in. Might keep the plugs from fouling out till the problem goes away.

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 916 Answers

Check these as I blieve from all the comments you have made one will be at fault.
1. Distributor  2. PCV Valve 3. Breather Filter 4. Vacuum hoses on the manifold 5. Manifold
I hope this helps please post the rsults and I will continue to help you to try and get the issue resolved.

Posted on Dec 30, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,861 Answers

P-0171 indicates a problem with the MASS AIR FLOW SENSOR. It provides two functions: It measures the air flowing thru it, AND the temperature of the air. Remove it and examine it VERY CLOSELY. Look for debris and/or broken wires inside of it. A bad MAF will give you a "RICH" condition, which would explain the soot. Please advise me of what you find. Thanks.

Posted on Dec 30, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Brigadier General:

    An expert that has over 10,000 points.

  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

Initially, a couple of idea you may want to explore/consider:

  • stale/contaminated fuel;
  • water entering the combustion chamber;
  • vacuum leak (bear with me), spray with ether or starter fluid intake manifold gasket, if no change, no leak, if idle goes up, there is leak;
  • carb/injector cleaner sprayed by removing air filter;
  • air leak, check base of airbox;
  • use a higher octane fuel and drive the car hard over a stretch;
  • compression test;
  • all plugs firing? Start the engine with 1 plug missing (sparkplug wire removed), notice any difference? shut down, reconnect sparkplug wire, do the same to the next plug. Note at which lug no difference whether connected or not;
  • checked the water at the radiator, any sooth there also floating?
Good luck and Thank you for using FixYa. Happy New Year.

Posted on Dec 30, 2008

  • Louie  Role
    Louie Role Dec 31, 2008

    Hi again,

    Appreciate the update.


    • cooling fan would run constantly - normally would suspect fused contacts of relay, but that would mean no way "kicked off for a second or two";

    • "came right back on & the check engine light came on" might be significant, interrelated?

    • why would it "ran great" after "changing the fuel pump/filter"? Changing both would mean works was done at the rear/fuel tank and none engine side. Or was there? Except remove one of the battery terminals, which would reset the ECM;

    • If ECM defective, it would not reset and would not have even a moment of "ran great";

    • if reset of ECM makes it "ran great", then again ECM is most likely not the culprit, something is trigerring the ECM to go faulty, one of the sensors;

    • fan comes on at about 228 deg F, A/C on the fan will run all the time under 40 ;

    • dex cool type of coolant used (preferably)?
    Cheers.




  • Louie  Role
    Louie Role Dec 31, 2008

    Pls check the hydrovac. Better yet temporarily remove and plug the vacuum hose leading to the hydrovac. There would normally be a PCV like device, white plastic where the vacuum hose enters.

×

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 740 Answers

Change the MAP sensor..good luck

Posted on Dec 30, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My x type 3.0 has fault readingP1647 could you tell me what this means please


OBDII DTC

P1001 Key on engine running unable to complete; key on engine running aborted

P1100 Mass air flow sensor intermittent

P1101 Mass air flow sensor out of self test range

P1104 Mass Airflow (MAF) Sensor Ground Circuit Malfunction

P1107 Left MAP Sensor Circuit

P1108 Right MAP Sensor Circuit

P1112 IATS Circuit High Voltage

P1113 IATS Circuit Low Voltage

P1121 Pedal Position Sensor Circuit A Range/Performance

P1122 Pedal Position Sensor Circuit A Low Voltage

P1123 Pedal Position Sensor Circuit A High Voltage

P1137 No Rear HO2S Response

P1138 No Rear HO3S Response

P1157 No Rear HO2S Response

P1158 No Rear HO3S Response

P1171 All Cylinders Too Lean

P1172 All Cylinders Too Rich

P1176 Adaptive Fuel Metering Trim Too Lean

P1177 Adaptive Fuel Metering Trim Too Rich

P1178 Adaptive Fuel Metering Trim Too Lean

P1179 Adaptive Fuel Metering Trim Too Rich

P1187 Both Front HO2S Heater Circuits (High Resistance)

P1188 Both Front HO2S Heater Circuits (Open Short to Ground High Resistance)

P1190 Both Front HO2S Heater Circuits (High Battery Voltage Short to Voltage)

P1193 Both Front HO2S Heater Circuits (High Resistance MAF Sensor Fault)

P1194 Both Front HO2S Heater Circuits (Open Short to Ground High Resistance)

P1196 Both Front HO2S Heater Circuits (High Battery Voltage Short to Ground)

P1198 Fuel Level Sensor (High Voltage)

P1199 Fuel Level Sensor (Low Voltage)

P1201 No. 1 Fuel Injector

P1202 No. 2 Fuel Injector

P1203 No. 3 Fuel Injector

P1204 No. 4 Fuel Injector

P1205 No. 5 Fuel Injector

P1206 No. 6 Fuel Injector

P1221 Pedal Position Sensor Circuit B Range/Performance

P1222 Pedal Position Sensor Circuit B Low Voltage

P1223 Pedal Position Sensor Circuit B High Voltage

P1224 Electronic Throttle Control Position Error

P1226 Mechanical Guard Circuit Range Performance

P1227 Mechanical Guard Circuit Low Input

P1228 Mechanical Guard Circuit High Input

P1229 Throttle Control Circuit Malfunction

P1230 Fuel Pump Relay Malfunction

P1235 VSV 1 Circuit Range/Performance

P1236 VSV 1 Vacuum Circuit Failure

P1237 VSV 2 Atmosphere Circuit Failure

P1238 VSV 3 Release Circuit Failure

P1240 Throttle Position Sensor Voltage Malfunction//Sensor Reference Voltage Low (Throttle

Fuel Tank Pressure)

P1241 Throttle Position Sensor Voltage Low Input//Reference Voltage Low (Throttle Fuel

Tank Pressure)

P1242 Throttle Position Sensor Voltage High Input

P1243 Throttle Position Sensor Ground Malfunction

P1245 Crank Signal Low Input

P1246 Crank Signal High Input

P1313 Misfire Catalyst Damage Bank No. 1

P1314 Misfire Catalyst Damage Bank No. 2

P1315 Misfire Excess Emissions

P1316 Misfire Rate Above Limit

P1335 Crankshaft Position Sensor Circuit

P1336 Camshaft Position Sensor (CMP) Circuit Performance

P1361 Ignition Coil Primary Circuit (Cylinder No. 1)

P1362 Ignition Coil Primary Circuit (Cylinder No. 2)

P1363 Ignition Coil Primary Circuit (Cylinder No. 3)

P1364 Ignition Coil Primary Circuit (Cylinder No. 4)

P1365 Ignition Coil Primary Circuit (Cylinder No. 5)

P1366 Ignition Coil Primary Circuit (Cylinder No. 6)

P1367 Ignition Monitor (Bank A)//Ignition System Failure Group 1

P1368 Ignition Monitor (Bank B)//Ignition System Failure Group 2

P1371 Early Activation Ignition Coil (Cylinder No. 1)

P1372 Early Activation Ignition Coil (Cylinder No. 2)

P1373 Early Activation Ignition Coil (Cylinder No. 3)

P1374 Early Activation Ignition Coil (Cylinder No. 4)

P1375 Early Activation Ignition Coil (Cylinder No. 5)

P1376 Early Activation Ignition Coil (Cylinder No. 6)

P1392 Variable Valve Timing Solenoid A Low Input

P1393 Variable Valve Timing Solenoid A High Input

P1396 Variable Valve Timing Solenoid B Malfunction

P1397 Variable Valve Timing Solenoid B Low Input

P1398 Variable Valve Timing Solenoid B High Input

P1400 EGR Valve Position Circuit (Valve Sticking Open or Short)

P1401 EGR Valve Position Circuit (Open Short to Ground)

P1408 EGR Temperature Sensor Circuit

P1409 EGR Valve Circuit

P1440 EVAP Purge Valve Open

P1441 EVAP Valve Circuit

P1443 EVAP Valve Circuit

P1447 EVAP Valve Circuit

P1448 EVAP Valve Circuit

P1454 EVAP System

P1474 Charge Air Coolant Pump Relay

P1475 Radiator Fans Slow Malfunction

P1476 Radiator Fans Fast Parallel Circuit Malfunction

P1506 Idle Speed Control Circuit (Low RPM; Bank B)

P1507 Idle Speed Control Circuit (High RPM; Bank B)

P1508 Idle Speed Control Circuit

P1509 Idle Speed Control Circuit

P1512 Throttle Position Sensor Idle Switch Sense Circuit

P1513 Throttle Position Sensor Idle Switch Sense Circuit

P1514 Park/Neutral Position Switch High Load Neutral/Drive

P1516 Gear Change Park/Neutral Malfunction

P1517 Engine Cranking Park/Neutral Malfunction

P1607 MIL Output Circuit

P1608 Automatic Transmission

P1609 Internal ECM Error

P1641 Fuel Pump Relay No. 1

P1646 Fuel Pump Relay No. 2

P1739 Automatic Transmission

P1775 Transmission Control Module MIL Circuit

P1776 Torque Reduction Request Signal

P1777 Torque Reduction Circuit

P1780 Automatic Transmission

P1781 Automatic Transmission

P1782 Automatic Transmission

P1783 Automatic Transmission

P1785 Automatic Transmission

P1790 Automatic Transmission

P1791 Automatic Transmission

P1792 Automatic Transmission
P1794 Automatic Transmission

Mar 22, 2013 | Jaguar Cars & Trucks

1 Answer

1996 isuzu rodeo keeps reading #2 misfire runs good xcept when cold it hesitates most times or jus occasionally hesitates then the check engine light flashes and its guzzling gas i only got 50 miles on a...


A misfire alarm typically means the coil pack mounted above the sparkplug indicated in the misfire had gone defective.

To test it, swap the coil pack with another cylinder, and see if the misfire goes from #2 to the cylinder you put it on.

If the misfire continues to be on #2, then consider changing the sparkplugs.

I hope this helps.

May 14, 2011 | 1996 Isuzu Rodeo

1 Answer

My '01 impala 3.4 v-6 flat spots when COLD, at around 20mph. the idle is ruff with random misfires. acceleration is overall poor. when HOT, most symptoms go away leaving only some slight acceleration...


depending on mileage, but possible tune-up could fix it. if already done then check ignition coil pack and ignition wires also spark plugs, check vacuum hoses for leaks or porous, last injectors clogged - use some techron fuel injector cleaner (wal-mart has them). Also get the throttle body and iac valve cleaned by throttle cleaner . Also this other possibilities are to be checked and confirmed.:---- Engine running rough or misfiring can be cause by the following:

1.Defective spark plugs
2.Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4.False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
10. Throttle position sensor.
11. Manifold absolute pressure sensor
12.Mass Airflow Sensor
13.Idle air control valve

--------- This should help.Keep updated.Thanks.Helpmech.

Mar 27, 2011 | 2001 Chevrolet Impala

2 Answers

I also have a 2003 2.2L ecotec manual transmission.I have changed plugs,coil,map sincer,still have a misfire problem,i think somthing is wet inside but what that might be i don't know.Any suggestions


I worked on another fuel injected vehicle and found that it had an injector problem which had caused the check engine light to com on telling me that I had a random misfire.I did the same as you did and changed the knock sensor ,the crank position sensor and the cam position sensor only to find out that is was a distributor and injector problem.I would recommend that you test your cam and crank sensor and make sure that they are working properly And if the sensors are good then I would check my fuel system including the injectors to make sure there are no bad ones.

Feb 14, 2011 | 2003 Chevrolet Cavalier

1 Answer

2005 Cavalier misfiring on 2 cylinders, dumping fuel


Spark plugs get there voltage from the ignition coil packs, more then likely you have a bad coil pack or coil pack boot, pull one coil pack or spark plug wire or boot at a time, if you see a drop in rpm, that one is good, if no drop bad coil pack.

Jul 19, 2010 | Chevrolet Cavalier Cars & Trucks

1 Answer

I have a 2002 TrailBlazer with the straight 6,diognostic check said #3 cylinder was dead or misfiring, also map sensor showed up. #3 cylinder was misfiring, so to test the coil pack I swapped #3 coil pack...


did you replace only one spark plug? that can cause issues because of differences in resistances between cylinders. also, did the map code stay off after replacing
?

Feb 28, 2010 | 2002 Chevrolet TrailBlazer

2 Answers

2.5 4 cyl engine Code P0171....Black Soot in the exahaust and water...Black soot on the plugs. I have replaced the catc and muffler, MAP sensor, coolant temp sensor, coil, plugs, wires, dist cap,cleaned...


Black soot in water? You mean water in the tailpipe or black soot in the coolant in the radiator? Have you tested the manifold air temp sensor and the throttle position sensor? If they were OK, you may just have worn injectors that are allowing a bit too much fuel flow or a bad spray pattern. In the meantime, you could try replacing the plugs with a set that is one heat range hotter. If the plugs become slightly fouled, that can cause a snowball effect which makes the situation worse.

Nov 11, 2009 | 1997 Jeep Wrangler

5 Answers

DTC PO300 and PO506 engine won't idle when cold


CODE PO300 MULTIPLE ENGINE MISFIRE DETECTED CONDITIONS. CODE PO506 IDLE SPEED TOO LOW CONDITIONS.LOOKS LIKE THE IDLE SPEED CONTROL IS NOT WORKING.

Sep 04, 2009 | 2003 Pontiac Montana

1 Answer

Misfire in cylinder 3


NO to the MAF Sensor Question, and Spark Plug Wires Or BOOT Will Cause Missfire. As For Mass Air Flow Sensor Easy Check is to Dissconnect it While Engine is Running And If ENGINE SMOOTHES OUT The Sensor is Bad

Jul 30, 2009 | 2001 Volkswagen Passat

2 Answers

2002 Jeep Grand Cherokee Lardo misfiring


You say you changed the cam sensor. A1391 code is a crank sensor on the top of the trans. bell housing.

Feb 22, 2009 | 2002 Jeep Grand Cherokee

Not finding what you are looking for?
Cars & Trucks Logo

45 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

60541 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21927 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...