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1998 chevy c1500 5.7 ignition wave

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6 months 1 week ago - 6 months 1 week ago #63335 by Charleshind
1998 chevy c1500 5.7 ignition wave was created by Charleshind
I picked up my versus and copy of danners book and trying to get into it with my own vehicle that has a rough idle(shake that looks kind of like a misfire) it runs great at any other speed and I can’t really say that it has trouble taking off from a stop either. I have a picture of the waveform and when snapping the throttle it seams cylinder 8 jumps way up on the kv scale above any other cylinder. I attached a picture and need some help figuring out what all this means.  
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Last edit: 6 months 1 week ago by Charleshind.

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6 months 1 week ago #63341 by Cheryl
Replied by Cheryl on topic 1998 chevy c1500 5.7 ignition wave
Looks like a plug wire issue with a lot of resistance.

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6 months 1 week ago #63343 by Charleshind
Replied by Charleshind on topic 1998 chevy c1500 5.7 ignition wave
That’s what I was leaning towards but it also has a new wire newish plug new cap and rotor.

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6 months 1 week ago #63346 by Cheryl
Replied by Cheryl on topic 1998 chevy c1500 5.7 ignition wave
Probably a cheap brand replacement wire. Only way to know for sure is put a plug wire on

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