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How to test a coil pack on 6.0 chevy express van

Misfire on #8 cylinder tested plugs ok,wire ok,

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 5 Answers

SOURCE: 2003 Chevy Venture misfiring

The injector is a good possibility, although you should check for spark in the wire first, as the electrical is the weakest link in the system. Put a spare plug in the end of the wire with the plug resting on metal, then have someone crank the van to see if you have spark that far, test and replace spark plug, (do not get shocked!) then look into a new injector or a good cleaning.

Posted on Jul 17, 2009

dmsr63
  • 2050 Answers

SOURCE: on 96 chevy van cylinder 5 misfire

Check the plug wires with a spark tester, to see if they all spark good. That will verify all of the parts you replaced. If they look good, do a compression test on cylinder five.

Posted on Oct 06, 2009

  • 819 Answers

SOURCE: I have a 2002 TrailBlazer with the straight

did you replace only one spark plug? that can cause issues because of differences in resistances between cylinders. also, did the map code stay off after replacing
?

Posted on Feb 28, 2010

  • 10 Answers

SOURCE: 97 caliver p0300. Cant go over 20 mph. Very bad

Ignition Control Module!!!! Maybe bad or bad ground....These go all the time on cavy's....Let me know if this helps

Posted on Sep 08, 2010

  • 137 Answers

SOURCE: i have a 2001 chevy

misfires can be caused by faulty ignition components, but they can also stem from other components. Such as faulty injectors, or improperly timed or unseated valves. Sounds like you have touched on all of your ignition suspects.
Are there any codes present other than P0304, P0305 and P0306? If so they should help guide you in the right direction. If not, You might want to make sure your valves are seating and if so, go ahead and swap an injector from a misfiring hole with a good one from a hole with no misfire. (like switch #2 and #4 injectors for example) if the misfire moves to cyl 2, you know the injector is at fault.

Posted on Oct 02, 2010

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Whats wrong with a 2994 chevy corsica it wonts to skip nall the time


Check for ignition misfire. Possible spark plug/ignition wire/coil pack. You need to isolate the cylinder that may be causing the problem. Start the vehicle and pull one plug wire off at a time. If the engine changes in rpm, that cylinder will be working. If you pull one off and there is no change in rpm, that is the cylinder that needs attention. Check spark plug/wire for that cylinder. If both ok,possible injector/wiring problem. If injector ok, a compression test will be required to see if cylinder is operartional

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Replace coil packs on the ford explorer 2006


What codes P0304 & P0308 ? This just means the PCM detected a misfire on those cylinders .an could be a few different things !
What ignition type does your vehicle have coil on plug or a coil pack with 8 plug wire towers ? If you have coil on plug ignition there are two wires going to the coils , one has battery + an the other is control from PCM . Check power first with volt meter or test light . Or use a spark tester on those two cylinders . No Spark Testing control testing

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I have a 97 Ford Explorer AWD 8 cylinder. Check engine light comes on and I get code p303. Vehicle bucks at times, uses lots of gas. Believe it may be 02 censor, spark plugs and wires tested ok. Any Idea


code says #3 cylinder misfire, check the coil pack for this cylinder to see if its got spark, bad o2 sensor will spit another code, its most likely the coil

Mar 17, 2011 | 1997 Ford Explorer AWD

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1998 chevy venture has electricity arcing across the harmonic balancer


The coil pack on these engines runs hot, so it's important to make sure there is heat sink grease under the coil to transfer heat. If the coil module gets too hot, it will fail.
If an engine is hard to start or has a misfire at higher speeds, the problem may be a weak coil, a bad plug wire, or a fouled or worn spark plug. On 1996 and newer vehicles, you should get a cylinder misfire code. A code for one cylinder would likely indicate a fouled plug, bad plug wire, or possibly a clogged or dead fuel injector, or a compression leak (burned exhaust valve). Misfire codes for two cylinders that share a coil would likely point to a bad coil.
Another way to figure out if a misfire is a bad coil is to swap two of the coils on the coil pack. If the misfire moves to the new cylinders, the problem is the coil. If the misfire remains in the same cylinders, the coil is OK and the problem is the wires, plugs, injectors or compression.
If you test a coil with an ohmmeter, the test specs are 0.5 to 0.9 ohms for the primary terminals under the coil, and secondary resistance of 5,000 to 8,000 ohms at the high-voltage terminal.

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1 Answer

I have a 2002 TrailBlazer with the straight 6,diognostic check said #3 cylinder was dead or misfiring, also map sensor showed up. #3 cylinder was misfiring, so to test the coil pack I swapped #3 coil pack...


did you replace only one spark plug? that can cause issues because of differences in resistances between cylinders. also, did the map code stay off after replacing
?

Feb 28, 2010 | 2002 Chevrolet TrailBlazer

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I have a ford explorer 99 but it's giving a error code PO306 what do u think it is


It sounds like a misfire. Check spark plugs 5 and 6. It could be bad fuel, bad plug wire, or weak coil. Check the fuel injectors as well. Other possible causes could be an egr valve stuck open, vacuum leaks, low fuel pressure.

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1 Answer

Check engine light for 04 express 2500 van


Yes that is correct.There is also a coil that fires the spark plug for each cylinder.There are specific tests for each component so you can find out which part is bad.compression could also be an isue not likely if the problem came all the sudden.

Mar 03, 2009 | 2004 Chevrolet Express

1 Answer

Misfire on 1996 Chevy Express 5.0 after compression test.


This is most definitely ignition related or fuel injector related.

Mar 02, 2017 | 1996 Chevrolet Express

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