Question about Cars & Trucks

Open Question

Cylinder 3 misfire very little compression 65

Cylinder 3 misfiringvery little compression measured at 65

Posted by Anonymous on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
  • 2 Answers

SOURCE: misfire in cylinder 3

I recently had that (po303) misfire in cyl. 3 on my 2002 Mazda MPV LX with the 6cyl. 3.0 ford duratec engine (the only engine installed that year). 75k miles. The engine was studdering while at idle and upon accelleration. It was worse when the AC was on. The check engine light came on. I went to Advanced Auto Parts. They loaned me a code reading handheld computer. An Actron OBD II. PO303 misfire in cyl.3 was the verdict. I then got on the internet to do some research. Found that the problem could be a number of things. Coil packs and/or wiring harness, spark plugs, egr valve and/or ports, fuel pump or filter, fuel injectors etc. etc.. I decided to try what I thought was the simpilist remedy first. I purchased new spark plugs, retrieved some tools from the garage and opened the hood. Though I've performed all the other routine maintenance items like oil changes, battery maintenance, air filter etc., I never really looked for or noticed the spark plugs or their location. The front bank of 3 plugs was a breeze to change out but the rear bank....well they havn't been changed yet. Not so simple. At that point I decided that since I would have to remove the intake manifold and all the wires,hoses and etc. would have to be unattached, I might as well change the 3 coil packs and recondition the 6 fuel injectors while I had it apart. The cost and hassle of those fixes then lead me back to do what my old school, auto mechanic all his life father, alway told me. "Look at the easy fixes first". Many of us think that since everything nowadays is so complex that the fix must be complex also. Well, I then purchased a bottle of Chevron Techron Fuel Injector Cleaner. So many other brands were on the shelf to choose from. Seafoam, Lucas, Shell, CRC, STP, etc., etc.. Through netsurfing I discovered an old CARTALK Q & A. They kinda gave a halfhearted nod to the Chevron product. It stuck with me so I tried it. Within 10 miles the engine began to run better. The more I drove the better the performance. The Check engine light went off. No more misfire in cyl. 3 and no more code po303.

Posted on Dec 07, 2008

Ad
roedmondson
  • 68 Answers

SOURCE: 2000 CIVIC System too lean Cylinder 3 and 4 misfire Deteced

  1. P0171: This means that the oxygen sensor has detected a lean air-fuel ratio. This can be caused due to a vaccuum leak or a problem in the HO2S circuit or the HO2S (Heated Oxygen Sensor) itself. (Bank one Sensor one). This is commonly located along the exhaust pipe. It could also be a bad Mass Air Flow sensor or a bad Engine Coolant Temperature sensor. Diagnostic checks will be needed to be carried out to be verified though
  2. Well as for the other codes, it means #3&4 cylinders are misfiring. It is a possibility that the P0171 code mite have caused the others to show up. I can be wrong though. But it is a strong possibility. If the air fuel mixtue is too lean indeed, mis-firing will occur, unless it is an actual electronic and not a mechnical problem. By the way, when these codes appear, how is the engine's performance. Does it remain the same or behaves poorly?

Posted on Feb 14, 2009

  • 119 Answers

SOURCE: MISFIRING ON CYLINDER 1 VW POLO 1.4 3CYLINDER

I have changed a few cylinder heads under warranty for this type of problem. The exhaust valve guides wear, this causes the exhaust valve to seat badly, giving low compression. if one cylinder compresion reading is more than about 50 psi below the others, then this warrants head removal. It is quite a job, due to the fact that the camshft id chain driven. If you are up for it then once the head is removed, poor liquid into the exhaust ports and see if it leaks out through any of the exhaust valves.

Posted on Jul 23, 2009

roniecon
  • 6927 Answers

SOURCE: 2003 kia # 3 misfire/ runs rough

Replace the coil for number 3 cylinder.

Posted on Nov 11, 2009

  • 880 Answers

SOURCE: 1997 Isuzu Rodeo 3.2 L - misfire on cylinder

I would check for a bad plug wire next and then a compresson test on #5 cylinder.

Posted on Jul 16, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

What causes misfires?


If the misfire is on one a particular cylinder or perhaps 2, these issues need to be addressed and checked...
1. Power to the spark plug.
2. Coils and spark plug condition.
3. Fuel supply to the cylinder
4. Air supply to the cylinder
5. Correct fuel/ air mixture to the cylinder
6. Cylinder compression. Low compression or a cylinder compression level below spec will result in a misfire. If the compression tester shows low compression in a cylinder the causes of the poor compression reading then need to be addressed.

The fault codes generated by the computer and read by an appropriate scanner will tell you which cylinder or cylinders are misfiring.

Nov 14, 2015 | Cars & Trucks

1 Answer

Why is there a cylinder 2 misfire?


Check these three things in the misfiring cylinder: spark, gas, and compression. One of them is wrong or missing. For spark check the spark plug and wire. Make sure you have spark on the plug wire, a strong blue spark. For gas, the fuel/air mixture may be wrong. Does the fuel injector pulse, putting gas into the cylinder? Possibly you may have a leaking injector or a clogged injector.

If gas and spark seem okay, you need to check compression in the cylinder. Low compression will cause a misfire. If compression is 20 or 25% lower than adjacent cylinders, that could be causing a misfire. For example, say numbers 1 and 3 cylinders had about 150 psi compression. 80% of 150 = 120, so if cylinder 2 is 120psi or less, that could be setting the misfire code. Low compression can be caused by valves not seating well, or bad piston rings, bad head gasket- something in the combustion area of the cylinder is losing compression.

Aug 17, 2015 | 2006 Mazda Tribute

1 Answer

Misfire on Cylinder 3 swapped plugs between 3 and 4 on Pontiak Aztek 2003. Misfire remained on cylinder 3. Swapped ignition coil 3 and 6 with ignition coil 1 and 4 misfire still on cylinder 3


Try a new plug wire on cyl 3 if that doesn't fix it you could have a bad valve or compression problem on cyl 3 Try doing a compression test also If it has injectors for each cylinder you could have a bad injector for cylinder number 3

Dec 04, 2014 | 2001 Pontiac Aztek

1 Answer

Cylinder won't fire


Every internal combustion engine needs compression, fuel, air and spark. If any of these are missing, the engine will misfire. Lack of compression can be due to head gasket failure, burnt valves or worn compression rings. Rings are the most unlikely if only one cylinder is misfiring. Lack of compression can be measured with a fairly inexpensive pressure gauge from the local auto parts shop. The cause of lack of compression (head gasket, burnt valves) will be a more serious matter.

Compression is measured by removing the spark plug of the suspected misfiring cylinder and inserting the pressure gauge firmly into the plug opening while an assistant (your wife or sweetheart will do fine) turns the key to swing the engine. Compare the reading with a known good cylinder. The readings should have at most not more than a 5% variance.

If the compression is good, start with the spark. Do not be fooled by a "nice"spark coming from the plug lead. Swap plug wires with a known good cylinder and see if the problem moves. Check the distributor cap for cracks, which also are sometimes next to impossible to see with the naked eye, so if an exchange cap is available, try swapping. The final, but most unlikely culprit is the spark plug itself. If it is not new, fit new plugs, they\'re cheap enough.

Then, a sly little monster that has caught me a time or two is the distributor cam. In an older vehicle the distributor cam can have a worn bush, which will open the points when the cam is on one end of its travel, while barely or not at all open the points when it is opposite, thereby causing a weak or even absent spark to the cylinder it is supposed to ignite at that end.

Since the other cylinders appear to be firing OK, the problem is not with air supply (unless of course the air intake inside the manifold is blocked by a rag someone had forgotten to take out while they were cleaning the engine, but let\'s not go there.)

Jul 06, 2014 | 1997 Chevrolet C1500

1 Answer

Ford escort 1996 1.8i - running on 3 cylinders, changed leads have spark


Determine what cylinder is misfiring and do a compression test on that cylinder. Compare it with a cylinder that is not misfiring. You should have no more than 20% difference between the good cylinder and the bad cylinder. If it is low on compression, suspect a burn valve or bad valve seat... and it will require cylinder head repair. If it is good on compression, then look for a faulty injector or some other reason for the misfire on the dead cylinder.

May 13, 2014 | 1998 Saturn SL

1 Answer

04 DODGE Ram hemi cylinder 3 misfire


Check engine compression and compare. then test running engine compression most engines have about 130-170 cranking compression and about 90-110 running compression. OR bring that cylinder to its Top Dead Center compression stroke apply air to the cylinder and check to see where the air is going open throttle plate bad intake valve, from exhaust pipe bad exhaust valve, from oil cap piston rings.

Mar 23, 2014 | 2004 Dodge Ram 1500

2 Answers

Cylinder misfire


If you already replaced all those thing there is only 2 things left that could be causing this problem one(you don't what it to be this one) low compression on cylinder 3 or the cheap fix, the coil pack, I would check the coil pack before checking compression.

Nov 05, 2013 | 2002 Ford Taurus

1 Answer

What is a cylinder 3 misfire


CYLINDER 3 MISFIRING. MEANS NOT FIRING .CYLINDER 3 IS MISSING FIRE.COULD BE FAULTY OR DIRTY FUEL INJECTOR.YOU COULD HAVE BAD SPARK PLUG OR COIL AND WIRE.CLEAN FUEL INJECTORS CHANGE PLUGS AND COIL TO NUMBER 3 CYLINDER .WHEN YOU DO A LITTLE TUNE UP.THAT WAY YOU WILL KNOW IF YOU HAVE A MECHANICAL PROBLEM TO 3 CYLINDER LIKE LOW COMPRESSION.LEAKING INTAKE AT 3 CYLINDER OR BURNED OUT VALVE.

Feb 20, 2011 | 2000 Saturn SL

1 Answer

Have 2005 lincoln aviator - has miss at 30-55 MPH - no codes replaced all coils ( ford) & spark plugs (twice) - repair vacuum leak at PCV Still misses -- no codes -- help


The COPS (coils) may have shorted the drivers in the PCM (computer). You should get a misfire code for each cylinder misfiring though.

Slim possibility, but very expensive unless you have a service contract.
LINCOLN: 1999-2004 Navigator
2002-2003 Blackwood
2003-2005 Aviator MERCURY: 2003-2004 Marauder
ISSUE: Some 1999-2004 Navigator, 2002-2003 Blackwood, 2003-2005 Aviator, 2003-2004 Marauder and 2003-2004 Mustang vehicles built before 12/19/2004 equipped with 4.6L 4V/5.4 4V engine may exhibit a runs rough, lacks power, and engine misfire, prompted by a MIL light and DTC codes P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, and P0316.
ACTION: Diagnose engine for engine misfire concern. If diagnostics determine an engine misfire which is characterized by leakage through exhaust valve(s), only replace the affected cylinder head(s).
SERVICE PROCEDURE FOR VEHICLES WITH RUNS ROUGH/MISFIRE CONDITION:
  1. Perform relative compression check on all cylinders. If abnormal, check cylinder leakage and actual compression for "low" cylinders refer to Workshop Manual (WSM), Section 303-00.
  2. If leakage/compression check indicates a valve train concern, per valve train diagnostics in WSM, Section 303-00, replace cylinder head and cam assembly, pipe plugs and timing chain tensioner, per procedure outlined in WSM, Section 303-01.
  3. If cylinder leakage and compression tests are inconclusive, perform misfire diagnostic, per TSB 05-22-8. NOTE: DO NOT TRANSFER SPARK PLUGS. INSTALL NEW SPARK PLUGS IN REPLACEMENT CYLINDER HEAD AND CAM ASSEMBLY. NOTE: THE ENGINE MISFIRE CONCERN IS TYPICALLY EXHIBITED ON THE LEFT HAND CYLINDER HEAD AND RARELY ON THE RIGHT HAND CYLINDER HEAD. UNLESS CONFIRMED, THE RIGHT HAND CYLINDER HEAD SHOULD NOT BE REPLACED AS AN "EXTRA MEASURE" SERVICE PRECAUTION. NOTE: THE REPLACEMENT CYLINDER HEAD WILL NOT IMPROVE OR REDUCE ENGINE HORSEPOWER OR TORQUE ABOVE ADVERTISED LEVELS.

Sep 24, 2010 | 2003 Lincoln Aviator

3 Answers

Error code p0303 cylinder 3 misfire


po303 is misfire on number 3 cylinder. It could be a bad spark plug or wire, maybe a loose plug wire, could be alot of things. injector problem drop of water in fuel that happened to hit that cylinder. but most likely a plug misfired. I would clear the code and see if it happens again. If so give care a tune up.

Aug 09, 2008 | 1999 Ford Taurus

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

Related Topics:

12 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cars & Trucks Experts

yadayada
yadayada

Level 3 Expert

77202 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22265 Answers

Randy Ohler

Level 3 Expert

14585 Answers

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

Answer questions

Manuals & User Guides

Loading...