Question about 2002 Chevrolet S-10

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Engine cranks but will not start...checked plugs...replaced them and wires.....it has spark...what am I missing

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Have you checked fuel pressure?

Posted on Oct 04, 2010

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3 Answers

Replaced coil pack on 3800 pontiac bonneville and its still missing what now?


First you need to determine what type of miss you have. Is it random on all cylinders, or is it restricted to one or two cylinders? Random misfire can be caused by crank or cam sensors that are starting to give out. Single cylinder misfires can be due to plugs, wires, coils (you already addressed those), as well as internal issues such as burnt or broken valves.

Oct 23, 2015 | 2000 Pontiac Bonneville

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2000 Yukon L'S IT WANT START BUT I HEAR THE PUMP COMING ON CAN U GIVE ME A SOLUTION


If it cranks good but won't start, have a helper crank it, while you visually check for spark at the spark plugs, if you have spark everywhere, use a gage and check fuel pressure. The fuel pump initial prime is one thing, need to be sure pump runs with engine cranking. I haven't looked at your wiring, yet.

Usually if your missing spark and injector pulse, engine cranking, I want to look for rpm signal comes from crank sensor. Don't replace anything without trying to do some testing.

Jan 25, 2015 | Cars & Trucks

1 Answer

Engine not firing on # 3 cylinder


Spark plug or coil likely problem. Might put a spark plug in the #3 wire and crank it over and see if it sparks. Plug will need to be grounded and someone to watch or crank engine for you. Leave original plug in hole while doing this. If you have a timing light. Attach it to the wire with it plugged to the original spark plug and start engine. If the light flashes the the coil and wire has power. If no light then more likely a coil. Depends on year of auto as well. Most of the newer ones have a coil for each plug. If its a older one... likely a plug or plug wire.

Dec 06, 2013 | Nissan Cars & Trucks

2 Answers

Engin keeps missing put new spark plugs in still the same


check maf sensor, cam/crank sensor, map sensor, fuel pressure, clean injectors, engine timing

Jun 19, 2010 | Ford Festiva Cars & Trucks

1 Answer

1999 Land Rover Discovery II engine miss


Observe the engine running in the dark to see if there are any spark jumps from the wires or coil, you may have a carbon track.....

Feb 16, 2010 | 2001 Land Rover Discovery Series II

3 Answers

"Cranks, but won't start". Replaced fuel pump, CKP, ICM & nothing


If the engine cranks over normally when you attempt to start you car, but the engine does not start, the problem may be NO FUEL, NO SPARK or NO COMPRESSION. The engine needs adequate fuel pressure, a properly timed spark and normal compression to start.


1) To find why the engine won't start, remove the air inlet tube from the throttle body, push the throttle open and spray a small amount of aerosol starting fluid into the engine. Crank the engine. If it has spark and compression but NO FUEL, it will start and run a few seconds before dying. If it does NOT start, it probably has NO SPARK.

2)Another method to check for spark is to pull a spark plug wire off of a spark plug (if it has plug wires, coil-on-plug ignitions do not) and place the open end of the plug wire near a metal surface on the engine. Have a helper crank the engine while you watch for a spark. DO NOT hold the wire while doing this as it can shock you. If you see a spark, the problem is not spark, but most likely NO FUEL or NO COMPRESSION. If you do not see a spark, the problem is in the IGNITION CIRCUIT.

3)Proper fuel pressure is critical for fuel injected engines to start and run. You should hear the fuel pump inside the fuel tank buzz for a couple of seconds when the ignition is turned on (no buzz means the pump is not running and the engine is not getting fuel). You can smell the tailpipe for gasoline vapors after cranking the engine. If you smell gas, the problem is likely not fuel but NO SPARK. You can also remove the plastic cap and press the schraeder valve test fitting on the fuel rail to see if there is any fuel pressure to the engine (not a very accurate test because fuel pressure must be at a certain level for the engine to start, for that you need a gauge). Even so, no fuel at the fuel rail would tell you fuel is not getting to the engine..

Aug 27, 2009 | Chevrolet Camaro Cars & Trucks

2 Answers

Check engine light is on, engine weak and missing


put a screw driver into the plug that you think is missing get it one forth of an inch away from a good ground and crank the engine over if there is spark try replaceing the plug or plug wire or both, and if there is no spark if that model has a distributor replace the cap and rotor and wires otherwise if it has the coil pack you will have to change the coil pack.

Aug 20, 2009 | 1998 Ford Explorer

1 Answer

Missing out


that would be a good start. pull the plug on # 1 cylinder and plug into wire now crank engine you should get spark same as # 5 cylinder if no spark replace the coil pack

Apr 18, 2009 | 2003 Ford Taurus

3 Answers

Car Misses after replacing the coils and spark plugs


Has the service engine light come on? If so, have the codes pulled and it will narrow down the cylinder that is causing the problem.
If no service engine light, have you narrowed it down to one cylinder or is it random.
Let me know and we will go from there.
Regards,

Mar 27, 2009 | 1995 Buick Park Avenue

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