Question about 1984 Nissan Pickup

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Z20 engine foul spark plug all time even after replacing it especially 4th cylinder

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Is it oil fouled? If so, replace spark plug wire. If it's coolant fouled you have a blown head gasket.

Posted on Mar 12, 2011

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I have a 2005 Monte Carlo, and I have had a misfire problem for awhile now. Had it to the mechanic to replace blown # spark Plug 3 times. The plug will work fine for about 7-14 days, then blows agai


That sounds like they're installing too hot a spark plug - they should step down about two, maybe three ranges toward a colder plug, at least for that one cylinder. If that mechanic knows what they're doing, they'll know how to select a colder plug for that car's engine.

Unless, of course, the plug isn't "blown" but is instead carbon fouling. If THAT's the case, then that cylinder is losing oil badly - whether from serious cylinder-wall wear, broken rings, or a dried-out valve stem seal.

Aug 07, 2014 | 2005 Chevrolet Monte Carlo

1 Answer

2005 dodge caravan sxt engine missing


I have run into these caravans burning oil, not much you can do except keep an eye on the oil level or spend a lot of money having piston rings replaced.
The best way to go about finding the misfire would be to go to an auto zone or other auto parts store that will scan the computer for codes. the codes will tell you which cylinder is misfiring.
I would bet it could be a fouled spark plug due to oil burning but could be a plug wire also.Have the codes read and find the cylinder that is misfiring and remove the spark plug and see if the tip is covered or worn down, if it is then replace spark plug and you may want to do them all. up to you.
If the plug is okay then move on to spark plug wires, swap the misfiring cylinder wire with another cylinder and see if misfire moves if it does then replace the wires.

To find the cylinder by #. If you are standing if front of the van looking at engine cylinders 2,4,and 6 are in front, closest to radiator from left to right. then cylinders 1,3,and 5 are at the rear also going left to right.
Good day.

Mar 03, 2012 | 2000 Dodge Caravan

1 Answer

Hi I have Lexus Rx300 year 1999. The problem is, some time when I start the engine, I noticed that the RPM meter shows low and the car little viberate and engine stops. But if in-between I push...


REPLACE SPARK PLUGS AND WIRES AND CLEAN FUEL INJECTORS. SOUND LIKE FUEL INJECTORS LEAKING FOULING OUT SPARK PLUGS WHEN YOU TURN OFF ENGINE.WHEN YOU START CAR UP NEXT MORNING CYLINDERS MISFIRING SO BAD FROM FOUL PLUGS ENOUGH SHAKE ENGINE.WHEN ENGINE RUNS FOR FEW MINUTES THAT WILL BURN OFF FOUL SPARK PLUGS UNTIL ENGINE RUN NORMAL.

Sep 06, 2011 | 2000 Lexus RX 300

2 Answers

How to find #4 cyl. on 4.0...not sure. diagnostic reads #4 not firing


The cylinders are numbered 1234 starting at the front of the motor. Number four is the last spark plug closest to the firewall.

Jan 22, 2011 | 2000 Jeep Grand Cherokee

3 Answers

3.4 GM v6. dead skip on #4 cyl. Spark plug ok, wire ok, replaced injector. Still dead skip. Found cyl. by disconecting wires to injectors. #4 not affected.


The very first thing that you should do after finding a cylinder mis-fire that can not be easily explained such as a fouled spark plug, is to take a compression test especially of the mis-firing cylinder to be certain that the mis-fire is not caused by a mechanical problem, and I have seen people spend a lot of time and money trying to hunt down an electrical problem when the actual problem was a mechanical one, and no electronic part will repair a burnt or bent intake or exhaust valve.

Jun 06, 2010 | 2003 Buick Rendezvous

1 Answer

1995 Thunderbird LX 4.6 V8 Cylinder Location, Distributor Wires


Which ever plug you changed you need to follow that plugs wire to the dis. cap and that should be the wire. chrismoss

Apr 11, 2010 | 1995 Ford Thunderbird

1 Answer

P0300 Engine Code Ford ZX2 2002 ZTEC dual over head cam engine. Has 107K miles. Has new plugs, Only thing I really notice is when I turn on AC the car seems to stumble at steady speeds, especially...


P0300 Random Misfire

Misfires can be caused by worn or fouled spark plugs, a weak spark (weak coil, bad spark plug wire), loss of compression, vacuum leaks, anything that causes an unusually lean fuel mixture (lean misfire), an EGR valve that is stuck open, dirty fuel injectors, low fuel pressure, or even bad fuel.

A Random Misfire code usually indicates a vacuum leak or bad gas.

NOTE: If a misfire in a specific cylinder should lead you to check the spark plug, fuel injector and compression.

Jul 25, 2009 | 2002 Ford ZX2

1 Answer

My 1995 bmw wont start!


I don't think a 1995 3 series has a timing belt. 100% sure if its the inline 6 cylinder.bmw only used timing belts on two engines. (never replaced one) I would first start with a fuel pressure check to start your diagnosis. From there i'd check to see if you are getting spark and maybe even see if your plugs are fouled. If you have fuel pressure and spark, i'd suspect bad gas.(especially if the problem occured soon after filling up). It may be a good idea to do a compression check if you found no fault with the vehicle.

May 04, 2009 | 1995 BMW 3 Series

1 Answer

Engine miss


if you have only one cylinder getting that excessive fuel it indicates that the computer thinks that that cylinder is not sparking and thinks no fuel is the proble. this is due to a timing issue. even though you replace the injector which was most likely not the problem to begin with. in order to get spark the coil has to energize you more than likely have a bad coil pack.replace the coil and your miss will no longer exist.

Apr 19, 2009 | 1995 Chevrolet Cavalier

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