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Ignition Coils

This is a discussion on Ignition Coils within the General Help forums, part of the LSx Technical Help Section category; Not sure where to put this, so I will put it here. What is the easist way to test if ...

  1. #1
    Junior Member oharam's Avatar
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    Ignition Coils

    Not sure where to put this, so I will put it here.

    What is the easist way to test if the coils are still good? Is there a write up, or anything to show/tell what the normal resistance is if using a multimeter?

    I am having some "lagging" while accerlating in 2nd, 3rd and 4th gear. Not much, but you can feel it. I am going to replace the plugs and wires next week, but I want to make sure the coils are good, and do them at the same time if needed.

    Thanks!

    Mike
    1999 Camaro Z-28 LS1 M6
    Cam, Heads, Exhaust

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    I take "the" out of

    Probably not the best way, but you can test to make sure there is power to the wire which conects to the pack usuing a multimeter. and then to test power to the plug, pull the plug on the pack side and see if it arcs (car must be running). Careful as it will shock you if you don't use caution.

    On a side note have a friend do this while you sit in the car "ready to turn off the ignition" this is what gullable friends are for.

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    Junior Member oharam's Avatar
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    I know I have spark to each plug, but does anyone have an idea of resistance levels/numbers when checking the ohms resistance of the coil?

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    Senior Member JayTA98's Avatar
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    I believe when you have an issue with the coils it will throw a code and SES light. I will replace the plugs and wires they are fairly easy and if never replace them it could fix your problem. Clean the MAF sensor also, go to the auto parts and buy a can CRC MAF cleaner. DON"T USE anything else to clean the MAF. Don't touch the small resistor kinda looking thing in there. This is another common issue with our vehicles specially if the vehicle has a KN filter. The MAF gets dirty iand it causes bad readings to the PCM.

    Check for vaccum leaks. There is a combination of plastic tubing and rubber hose that run behind the intake and around to the passenger side of the engine. The rubber cracks with time causing leaks. The PVC valve rubber fitting on the passenger side by the intake and a Y type rubber fitting on the back area cracks with age.

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    Junior Member oharam's Avatar
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    Thumbs up

    Quote Originally Posted by JayTA98 View Post
    I believe when you have an issue with the coils it will throw a code and SES light. I will replace the plugs and wires they are fairly easy and if never replace them it could fix your problem. Clean the MAF sensor also, go to the auto parts and buy a can CRC MAF cleaner. DON"T USE anything else to clean the MAF. Don't touch the small resistor kinda looking thing in there. This is another common issue with our vehicles specially if the vehicle has a KN filter. The MAF gets dirty iand it causes bad readings to the PCM.

    Check for vaccum leaks. There is a combination of plastic tubing and rubber hose that run behind the intake and around to the passenger side of the engine. The rubber cracks with time causing leaks. The PVC valve rubber fitting on the passenger side by the intake and a Y type rubber fitting on the back area cracks with age.
    Thanks for the info, I am going to toy with it this weekend.

  6. #6
    Senior Member JayTA98's Avatar
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    Quote Originally Posted by oharam View Post
    Thanks for the info, I am going to toy with it this weekend.
    I forgot to mention if you are getting new wires go with MSD if you can afford them.

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    Senior Member tatertot91's Avatar
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    when is the last time you replaced your fuel filter?

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    Junior Member oharam's Avatar
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    Not sure if the fuel filter has been replaced yet. I bought it used with about 131K on it. My near future PM list includes:

    Fuel Filter
    Plugs
    Wires
    Flush Brake Lines/New Brakes
    Flush Clutch Master Cylinder
    Change rear fluid/seal
    Radiator Flush
    Suspension

    Jay: I was looking at pricing out the MSD equipment first, and most likely going that route.

    Thanks for the info guys!

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    Senior Member tatertot91's Avatar
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    dont bother with MSD coils btw

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