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Rear cylmder has spark but does not have combustion

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Check that injector is operational and not blocked . Have a compression test done to check for valve /head gasket problem

Posted on Feb 17, 2014

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WHAT IS THE SPARK PLUG GAP


A spark plug is a device for delivering electric current from an ignition system to the combustion chamber of a spark-ignition engine to ignite the compressed fuel/air mixture by an electric spark, while containing combustion pressure within the engine.

Oct 15, 2015 | 2005 Ford Focus 1.6

1 Answer

Starter works trys tostart but wont


if it tries to start, i.e. it is catching check the level of fuel into the combustion chamber and the power of the spark.
If you crank over several times on a fully charged battery, remove one of the spark pluvs if it is a petrol/gas engine, and check the spark plug tip, it should be moist with gas/petrol or at the very least, smell stronly of it.
cHECK THE PLUGS ARE CLEAN, UNDAMAGED AND CORRECTLY ADJUSTED.
If you attach a plug lead to a plug and lean it on the engine and crank the starter over you should see a healthy blue spark between the electrodes.
If the fuel is there and the spark is there at the same time the engine should start, (assuming there is no makor internal problem.)

The issue might be the timing, getting the spark and the fuel to coincide in the combustion chamber when the piston is at the optimum position in the bore.


If there is a weak spark or too little fuel these should be investigated work away from the combustion chambers to the source of the fuel and electricity.
If the spark and fuel are healthy and the timing is okay check compression in the cylinders.
They should be healthy and withing a couple or five pounds of each other

It might be sensors playing up and affecting the ECU, (engine management system)


There is a lot to check, A GOOD MECHANIC SHOULD BE INVALUABLE TO DIAGNOSE.

GOOD LUCK

Jun 23, 2015 | Cars & Trucks

1 Answer

3rd cylinder misfire on my sidekick


Need all (Fuel, Spark, Air, Timing) to get combustion. Lack of combustion is what is referred to as a misfire. One or more of those things is missing from #3 cylinder.
Fuel - Fuel injector working?
Spark - Good Spark? Good Boot/Wire? Good coil?
Air - Got decent compression in that cylinder?
Timing - Shouldn't be an issue with just 1 cylinder, unless you have a distributor that is arcing past the #3 post.

Good luck.

Apr 20, 2014 | Cars & Trucks

1 Answer

Where are the Spark Plugs located in a 2004 Lincoln Navigator?


Hello, first how many miles do you have on this Lincoln? On that 4.6 L V8 engine they do have spark plugs but each plug has it's own spark coil located on a long rubber plug. You will see four little coils on each side of the engine. There will wires going in to the individual coils. There will be a bracket the holds the coils in place with a small 9 or 10 mm nut. Remove the nut, and gently pull on eac coil. There Hello, first how many miles do you have on this Lincoln? If you have over 120 thousand miles on this engine then it might need new spark plugs. On that 4.6 L V8 engine they do have spark plugs but each plug has it's own spark plug coil. You will see four little coils on each side of the engine. There will wires going in to the individual coils. There will be a bracket the holds the coils in place with a small 9 or 10 mm nut. Remove the nut, and gently pull on each coil. There a long rubber plug that fit in each spark hole. These rubber plugs are about 4 1/2 to 5 inches long.


Before removing the plug use an air hose with 50 to 60 lbs of pressure to blow each spark plug hole out which might have foreign object in the hole. Why, if you remove the spark plugs, and there is foreign material in that plug hole. Guess what, that stuff will fall into the combustion camber.



Then you will really have some problem. How fix if stuff fall into the combustion camber.

Squirt small amount of oil in the combustion camber, unplug all the coils and clear out there plug hole. Now remove all the spark plugs. Now, you can crank the engine and will the little amount in that cylinder that has the junk in it. The oil will wet the foreign debrie, and blow it out the spark plug hole. Then use a clean rag with with some oil it with a long screw driver to clean that spark plug hole Be careful that don't push the foreign material back into the combustion camber. Do this several time with little amount of oil.



Now, you can install the new spark plugs. On the spark plugs threads use some anti-shiz grease. Why squirt oil into the combustion camber? The oil is used to seal the rings on the piston to increase the cylinder compression. Just a small amount goes a long ways. GB...stewbison
a long rubber plug that fit in each spark hole. There rubber plug are about 4 1/2 to 5 inchs long.

Before removing the plug use an air hose with 50 to 60 lbs of pressure to blow each spark plug hole out which might foreign object in the hole. Why, if you remove the spark plugs, and there is foreign material in that plug hole. Guess what, that suff will fall into the combustion camber.
Then you will really have some problem. How fix if stuff fall into the combustion camber.
Squirk small of oil in the combustion camber, unplug all the coils and clear out there plug hole. Now remove all the spartk plugs. Now, you can crank the engine and will the little amount in that cylinder that has the junk in it. The oil will wet the foreign debrie and blow it out the spark plug hole. Do this serveral time with little amount of oil.

Now, you install the new spark plugs. On the spark plugs threads use some anti-shiz grease.
Just a small amount goes a long ways. GB...stewbison

Sep 12, 2011 | 2004 Lincoln Navigator

3 Answers

My 95 monte carlo 3.1 has just started miss firing after i changed the spark plugs and wires


DID YOU GAP SPARK PLUGS AT 0.060 FOR 3.1L ENGINE OR 0.045 FOR THE 3.4L ENGINE.DID YOU BUY AC R44LTSM SPARK PLUGS. DID YOU BUY AC DELCO SPARK PLUG WIRES.BECAUSE IF YOU BUY WRONG TYPE SPARK PLUGS AND WIRES CAR WILL MISFIRE.

Feb 20, 2011 | 1995 Chevrolet Monte Carlo

1 Answer

What is the proper spark plug gap for a 1990 Chev K1500?


Usually tighten the spark plug to avoid generator combustion vapor excape because the vehicle speed may reduce. Alternately, the vehicle requires an amount of spark plug grip to combust or blast for engine to ingnite to a start. Tighten the spark plug as hardened as possible only making sure not to compromise the loosening requireements later if a problem were encountered. The precausion is not to have a loose spark plug on the engine bloc. A possible malfunction of such a sitution is an explosion where the spark plug becomes the bullet capablel of occuring soon after the engine is started or later when the driver accelerates at full capacity.

Jan 22, 2011 | 1990 Chevrolet K1500

1 Answer

Explain induction comoression related to the spark ignition


Air & fuel enter the combustion chamber
The spark plug is ignited causing an explosion when the piston rises causing pressure
pushing the piston back down
& letting the spent air & fuel exhaust out the combustion chamber

Jan 12, 2011 | 1997 Chevrolet Lumina

2 Answers

My truck is making a loud knocking sound when I drive it


first you need to check the oil level (with engine off) if level is good than listen to engine knock with the hood open make sure it is coming from the engine and not the belt tensioner or something external on the engine,if nothing is found than engine will need to be repaired best thing is to bring it to a local shop for evaluation.best not to drive it much longer like this ,it could leave you stranded.

Nov 25, 2010 | 1994 Isuzu Trooper

2 Answers

Cyl#3&5 foul plugs 97 suburban good compression all cyl new cap rotor distributor wires plugs module


Fouling occurs when the spark plugs' firing tip becomes coated with excessive fuel, oil, or combustion deposits so that it is unable to produce a spark. A plug can become fouled from continuous low speed driving, improper spark plug heat range (too cold), improper timing (over-retarded), too rich an air/fuel ratio or an oil leak into the combustion chamber. A variety of self-cleaning features are designed into most plugs to reduce fouling.

Jul 17, 2009 | 1999 Daewoo Nubira

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