Question about Chevrolet Silverado 1500

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00 silverado code p0307 sylinder 7 misfire i dont know what it could be i have been told a number of things i even changed the spark plugs wires and plugs cleaned the inside of each sylnder.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

  • 196 Answers

SOURCE: 1996 ford f150 truck engine light on

What year is the truck ? if its a 1998 im sure its never had a tune up i would start with replacing the spark plugs and there is a very good chance that a coil is also bad

Posted on Jan 16, 2009

chuck943
  • 783 Answers

SOURCE: engine code p0307 cylinder #7 misfire

It could be carbon deposits on valve seats keeping valves from totally closing. You can try getting you a can of motorcraft PM3 top end engine cleaner and get engine up to operating temp then remove one of the small vacuum lines from the intake and draw the contents of the can slowly into the engine.After you have drawn in the contents shut engine off and let it soak for about 45 minutes then crank it back up and let it run until it clears. Now it will smoke like a forrest fire while you are doing this so don't be alarmed,just tell the neighbors you are spraying for mosqitos.This may cure the problem. If not you may be looking at a valve job.
This can be verified with a compression test if this is what is causing it.

Posted on Feb 05, 2009

motor1258
  • 6674 Answers

SOURCE: #7 cylinder misfire dtc p0307

Best place to start would be with spark plug and have a look at it. Wet with fuel would indicate no spark, carbon build up, bad wire or plug etc. If your familiar with testing at spark plug to confirm spark getting to plug, then do that first. If no spark to plug, coil pack would be next, or distributor parts such as cap, wires, rotor etc. If getting spark, then try cleaning and checking connections to injector. There are other more expensive things that may be causing it, but lets try the cheapest, most common and easiest first to narrow it down, and get back to me/us, if still having problem.

Posted on Dec 03, 2009

airjer995
  • 5332 Answers

SOURCE: the code that comes up

It means that the number seven cylinder is not working correctly. Remove that plug and check for oil fouling. If it is heavily covered in ashy looking deposits than you most likely have a ruptured belly pan gasket under the intake manifold. A lot of oil cunsumption with no visible external leaks is another sign this gasket has gone bad.

Posted on Sep 26, 2010

ZJLimited
  • 17970 Answers

SOURCE: 02 f150 5.4 dtc p0307

A code P0307 may mean that one or more of the following has happened:
* Faulty spark plug or wire
* Faulty coil (pack)
* Faulty oxygen sensor(s)
* Faulty fuel injector
* Burned exhaust valve
* Faulty catalytic converter(s)
* Running out of fuel
* Poor compression
* Defective computer

Possible Solutions:
* If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

* If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Ford's will sometimes flag the wrong cylinders on misfires. Usually a coil will fix Ford's misfire. Spark tester to me just verifies that the the circuit is good. Dont relay on this to say the coil is ok.

Keep us updated.

Posted on Feb 02, 2011

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.2005 Silverado 6,0 codes po307,po332,po455,po2761 changed plugs and wires. need help .suggestions pleaSe


P0307: Cylinder 7 Misfire Detected
http://www.autocodes.com/p0307_chevrolet.html

P0332: Knock Sensor 2 Circuit
http://www.autocodes.com/p0332_chevrolet.html

P0455: Evaporative Emission Control System Leak Detected Gross Leak
http://www.autocodes.com/p0455_chevrolet.html

P2761: Torque Converter Clutch Pressure Control Solenoid Valve Circuit
http://www.autocodes.com/p2761_chevrolet.html

Oct 28, 2016 | 2005 Chevrolet Silverado

3 Answers

2000 Jeep Grand Cherokee Laredo 4.7 liter code reads p0307 turn the car off when I turn it back on started misfiring and sputtering and wont stay started now help


code p 0307 is misfiring on no 7 cylinder ====causes --- engine mechanical fault ---wiring---ignition/ fuel system--injector --ECT/MAF sensor---ECM
look for low fuel pressure or ignition control module

May 31, 2016 | 2000 Jeep Grand Cherokee Laredo

1 Answer

HOW TO REPAIR A po307 engine code on a 2007 chevy silverado


the code p0307 is a misfire code on cylinder number 7 which is the 3rd cylinder on the driver side need to check spark plug and plug wire for that cylinder as it can be anything from a sticking valve to a vacuum leak what i do to check this is remove number 5 cylinder plug and wire and install them on cylinder number 7 and put plug and wire from 7 on 5 and clear codes and drive till light comes on and see if it comes up with same code if it does you will need to check for a vacuum leak or a valve problem with cylinder 7 if it comes up with a p0305 then change the plug and wire

May 14, 2014 | Chevrolet Silverado 1500 Cars & Trucks

1 Answer

I have a randome misfire code and a misfire on number 7 sylinder.The engine runs ruf and respones as if there is to much fuil going to the engine. I have replased the spark plugs and the entire number one...


probably camhead gasket went, it can give a misfire as well, so spark plug at cylinder 7 should be wet, there also has to be white smoke like steam coming from tail pipe even when engine is hot and water dripping

Apr 14, 2014 | 2005 Cadillac STS

1 Answer

Missing,viborating


Misfire could be a number of things:
a) spark plugs - change them if used over 15K miles - inspect/regap.
b) spark plug wires - change them if over 15K miles - inspect
c) ECM (electronic control module) - test with HEI (high energy ignition) tester.

The vibrating tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s)
not firing at all.

The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or
Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be
lit - the code coming from your truck's computer will probably be one or more of:
P0300 - Random/Multiple Cylinder misfire detected
P0301 - Cylinder 1 misfire detected
P0302 - Cylinder 2 misfire detected
P0303 - Cylinder 3 misfire detected
P0304 - Cylinder 4 misfire detected
P0305 - Cylinder 5 misfire detected
P0306 - Cylinder 6 misfire detected
P0307 - Cylinder 7 misfire detected
P0308 - Cylinder 8 misfire detected
P0313 - Misfire detected with low fuel

Jun 23, 2011 | 2009 Ford F-150

1 Answer

Vehicle missing,shaking,engine light comes on


Misfire could be a number of things:
a) spark plugs - change them if used over 15K miles - inspect/regap.
b) spark plug wires - change them if over 15K miles - inspect
c) ECM (electronic control module) - test with HEI (high energy ignition) tester.

The shaking tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s)
not firing at all.

The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or
Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be
lit - the code coming from your truck's computer will probably be one or more of:
P0300 - Random/Multiple Cylinder misfire detected
P0301 - Cylinder 1 misfire detected
P0302 - Cylinder 2 misfire detected
P0303 - Cylinder 3 misfire detected
P0304 - Cylinder 4 misfire detected
P0305 - Cylinder 5 misfire detected
P0306 - Cylinder 6 misfire detected
P0307 - Cylinder 7 misfire detected
P0308 - Cylinder 8 misfire detected
P0313 - Misfire detected with low fuel

Jun 23, 2011 | 2004 Ford F150

1 Answer

Codes. 0307. O128. 0316. 1000. 2106.


P0307 = cylinder no.7 misfire detected.
P0316 = misfire detected during startup-first 1000 revolutions.
P0128 = coolant thermostat (coolant temperature below thermostat regulating temperature)
P1000 = On board diagnostic readiness test not complete.
P2106 = Throttle actuator control (TAC) system----forced limited power mode.

Check the spark plug, spark plug wire, coil, and fuel injector for cylinder 7. Check compression on cylinder 7. When the no. 7 misfire is solved, clear the codes.

Feb 26, 2011 | Ford E-150 Cars & Trucks

1 Answer

Changed all 8 plugs on a 1998 expecition, then misfires started under load, none supposedly prior. changed all coils, reinspected plugs for damage,crackes etc-changed some again- no codes during first week...


The first thing I would check is, are any of the plug wires crossed. Your firing order should be 1 3 7 2 6 5 4 8, the cylinders are number front to back passenger side 1 2 3 4, drivers side 5 6 7 8.

Jul 15, 2010 | Ford Expedition Cars & Trucks

2 Answers

03 Dodge Ram 1500, P0307 code, check engine light


Try this:

Dodge 1995-1999 V8 spark plug wiring.

http://dodgeram.info/tsb/1998/18-48-98/18-48-98-v8.htm

Jul 01, 2009 | 2004 Dodge Ram 2500

2 Answers

1996 f150 5.0L misfire code


P0307 Code - Cylinder #7 Misfire Technical Description Cylinder #7 Misfire Detected
What does that mean? A P0307 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #7.
copyscape.gif SymptomsSymptoms may include:
  • the engine may be harder to start
  • the engine may stumble / stumble, and/or hesitate
  • other symptoms may also be present
Causes A code P0307 may mean that one or more of the following has happened:
  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
  • Defective computer
Possible Solutions If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty

Jan 14, 2009 | 1996 Ford F150 Regular Cab

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