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Dead cylinder. good spark (plug&wires),compression,fuel .Has an engle 110 cam and comp elec. points.Every thing else is stock,duel carb set up 40 cadron solix.

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Vacuum leak? You said compression is good. You checked crankning compression, did you check running compression. A broken valve spring would cause good cranking compression but very low running compression

Posted on Apr 24, 2010


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I have a 302 in a 65 mustang that won't start. I changed plug wires points cap and even carb and still nothing. Any thoughts the car ran good then it just stopped running

Do basic tests. Spark at plugs? Correct fuel pressure? If you are running the old stock tank, check that fuel filter is not plugged with rust. Run compression test just for grins.

Aug 03, 2015 | Cars & Trucks

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96 Isuzu Trooper automatic 3.2 liter dual overhead cam with driving and it just died wont start

Is the timing belt okay? Fuel? Oil level? Did it make any noise when it died? Smoke?
Some good info on Troopers stalling here...
Could be EGR, wiring harness break or too much oil coming into the intake from the PCV. This model has trouble with these things.

Jun 02, 2015 | 1996 Isuzu Trooper

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I have a 2001 3.0 ford taurus compression on all cylinders less than 90 psi

The car should start, even with low compression in some cylinders. Since two things are needed for combustion, fuel and spark, you need to figure out which is the problem. Remove a spark plug (or buy a spark tester from harbor freight) and check for spark at the plug. Without a tester, simply attach the plug wire to the plug while removed from the engine and rest the base of the plug on the engine block (grounding it). Have someone turn the engine over with the key and observe if you see a hot spark jumping the gap of the plug.
Recommend you go to the library and borrow a copy of Chilton's for your car model.

Apr 08, 2015 | 2001 Ford Taurus

2 Answers

65mustang 289 backfires and spits back in carb timing chain is good new evever thing points plugs and wires ran good went south all at once any ideals

Recheck timing. Get #1 cylinder to top dead center on the compression stroke. Make sure the timing mark on the balancer is where it should be. Then pull the cap and make sure the rotor button is pointing to the #1 wire on the cap.

Jan 24, 2015 | 1965 Ford Mustang

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

Dead cylinder....timming is right, getting fuel, spark is fine...compression test shows all cylinders are the same, good...the car only runs on 2 cylinders instead of 3...plugs and wires are new...

cant happen, you missed something, if you have spark, fuel and compression the cylinder will hit, go check again, when doing the compression test kill the spark and lock the throttle wide open. most common thing we see on the 1.0L 3cylinder is burnt valves most common cause is the wrong motor oil the valve lifters can not release the oil back threw the bleader hole if you use to heavey a motor oil, we see owners change the oil and use 10W-30 or 10W-40 and usely within 5000 miles the valves will burn, if you want to use the heaver oil then you need to replace the lifters with an updated part number that has the abilty to use the heaver oil.

Sep 26, 2011 | 1987 Chevrolet Sprint

2 Answers

It runs rough sometimes it dies, I have tuned it up , plugs dist cap, wires rotor the computer , It has very poor gas milage .it has a 2300 with automatic trans,

have the intake gasket checked. spray carb/choke cleaner around intake gasket and if rpms change then you have a bad gasket which causes rough idle bad fuel econ

Apr 09, 2011 | Ford Ranger Cars & Trucks

2 Answers

Hello i really need some help badly!! i have a 2006 dodge stratus my engine light is on & it blinks when i am like sitting at a redlight the codes said p302 cylinder 2 misfire we have replaced the...

Hi, other possibilities are the ignition wire, the injector, or a burned valve. First I would pull the wire up from the plug to see if I could hear sparks jumping. If no sparks, replace wires. If wire was good, next make sure the injector is clicking when the engine is running. If it isn't clicking, the problem is either a failed injector or the wiring. Pull the connector and probe the terminals with an AC voltmeter to see if it's getting a signal (if not, replace the injector). If it's clicking, it may be clogged. You can pull up the fuel rail with injectors attached and then crank the engine to see if the injector is pulling out gas like the others are. Before doing this, it may be less work to run a compression test to see if you have a burned valve. If the engine fails a compression test on cylinder 2, you will need to pull the cylinder head off for repair. If the compression is good, then I would pull up the fuel rail to check the injector.

Please see my tip at . These are generic instructions. If you get stuck, please get back to me.

Jan 12, 2011 | 2004 Dodge Stratus

1 Answer

Mapsensor was the problem they stated then the say the number 3 plug was misfire and comp is 50psi on 3 cylinder needs engine?

wow your in for a bill.first compression test needs to be done when the cylinder is TDC(top dead center).your be shocked how many mechanics dont know how to do this.i run into a few.compression that low head gasket blowen.need to replace if comp is at 50psi correct.get a second option and check.usually its misfiring because compression,inigition modular,wire bad internal or connection,spark plug.or fuel injector.get a second option or you going to the bank on this one.compression first check.

Aug 17, 2010 | 2002 Chevrolet Monte Carlo

1 Answer

Hi, I have a 1986 Chevy Van G20, V8, 5 Liter, 4 barrel carb. I cannot start the van, (all of a sudden it happened). It has a freshly charged battery, new starter, new fuel pump, new fuel filter, and has...

If it is getting spark and fuel check the timing. The timing chain may have jumped.Take out #1 spark plug and tap engine till the compression stroke comes up. To check just hold your finger over the plug hole and the compression will blow it out. Then rock crank by hand and set to top dead center. Take distributer cap off and see if rotor faces #1 cylinder. If you have spark to the plugs and the plugs are good and you have fuel timing or compression is all that is left.

Oct 15, 2009 | 1986 Chevrolet G20

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