Question about 1998 Isuzu Rodeo

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Engine has a miss number six piston i replaced the wire coil but still misses is the prblem the injector or is it burnt valves?

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  • Josh May 17, 2011

    Did you replace the plug after you replaced the coil and the wire? Even if it was new it could have gotten ruined while only running just a little bit.



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Did you replace the plug after you replaced the coil and the wire? Even if it was new it could have gotten ruined while only running just a little bit.

Posted on May 17, 2011


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1 Answer

I change plugs and wires still have A miss

This may be due to a vacuum leak, but it can also be caused by dirty fuel injectors, a weak fuel pump (low fuel pressure) or a faulty fuel pressure regulator. It can also be caused my ignition misfire due to worn or fouled spark plugs, bad spark plug wires, or weak ignition coil. Also low cylinder pressure from burnt valve, head gasket leaks or piston rings.

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no enough information but here goes
missing can be mechanical ---burnt valve
can be faulty injector or injector control-- injector or ECM wire
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crack in distributor cap --if not multi coiled
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Have a compression test done on the engine. Check for burnt valve or bent valve on that cylinder.

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Not firing on number 4 cylinder

Hi,you probably have a compression or injector issue.If it will reach swap the injector wire(2 pin clip)to the next cylinder and see if it starts to miss or even swap the whole injector with one of the front ones to see if the miss follows the injector.If no4 continues to miss grab a compession guage and do a test.It should have a minimum of 140psi at cranking speed.A burnt valve is often the culprit,the clue is popping at the exhaust at idle is an exhaust valve,puffing or chuffing in the intake is an intake valve.This is a head off job,and you should do a full valve service guides etc while off.Also on re assembly check all vacuum pipes and fittings as leaks kill valves.Also if it has just started doing this it may be a vacuum leak near no4.Sometimes the brake booster or hose,it needs to be fixed soon as valves are burnt quickly

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I have a bad miss in a 97 4.6

If you have a code for a miss on one cylinder, it could be the fuel injector instead of the ignition. It could also be a stuck or burnt valve problem.

Dec 25, 2012 | 1999 Ford F150 Regular Cab

1 Answer


engine missing could be caused by faulty spark plugs and wires,bad ignition coils,dirty fuel injectors,leaking egr valve,low cylinder compression,intake vacuum leaks.many things will cause engine to miss, first do minor fix,replace distributor cap and rotor,replace spark plugs and wires,clean fuel injectors,replace fuel filter and air filter,if this minor tune up dont help engine and engine still missing, do a vacuum test and compression test to check condition of engine.engine could be worn out have low compression by worn valves and pistons rings.

Jan 04, 2012 | 1995 GMC Jimmy

1 Answer

I get an error code P0302, miss fire on cylinder 2 detected. Wires and plug have been replaced. What else can cause this problem? Thank You for your assistance.

Burnt valve, blown head gasket, hole in piston, broken piston compression ring, bad coil if this engine has coil on plug configuration.

Jun 27, 2011 | 1998 Pontiac Grand Prix

2 Answers

1994 ranger. 2.3 engine. 8plug model. Dead miss in number 2 cylinder. Changed the plugs, wires and coil pack. Still a dead miss. If the person I got the truck from broke the timing belt while the engine...

that engine is a non-interference engine, so it should not have been damaged when the timing belt failed-I'd check the injector and see if it has good compression in the cylinder, and if it is low, squirt oul in the cylinder and test again-if it picks up alot of compression after doing this, you have a bad/broken compression ring, if it does not pick up, it is a valve,

Jan 25, 2011 | 1994 Ford Ranger Supercab

1 Answer

Replace coil and plugs but still not running right still missing

could be an injector but i just finnished replacing a 3.8L engine for this problem, burnt valves were the cause for the miss. try a compression test. wet and dry test it.

May 26, 2010 | 2000 Ford Windstar

2 Answers

Cylinder number 3 misfire

It can be a bad spark plug, plug wire, burnt valve, blown head gasket, or worn piston rings. Replace the spark plugs and plug wires and see if the miss goes away. If it does not then have a compression test run on the engine. In addition if you are loosing coolant with no apparent leak, and you see white smoke coming from the exhaust you may have a blown head gasket which will cause a miss.

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