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97-misfire

seve97

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seve97 Enthusiast

seve97

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i have a 97 silverado used to be a 305 now a 350 runs great! but one problem it misfires at idle and when you run at a low rpm.

changed sparkplugs/wires /cap and rotor 3 times in one year. I have the sparkplugs ac delco platnum 41-932 gaped at .60 like it specs but it works good them it starts to missfire after a couple months i change everything.

 

any suggestion on a diffrent gap or spark plug

seve97 Enthusiast

seve97

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Gap your plugs at .040. Will make a huge difference. Also clean your Throttle Body and Idle Air Control valve.

 

 

ill try this in the morning see if it works. ill double check on throttle body and idle air control valve

KENNHON Enthusiast

KENNHON

Posted
Posted
Gap your plugs at .040. Will make a huge difference. Also clean your Throttle Body and Idle Air Control valve.

 

 

ill try this in the morning see if it works. ill double check on throttle body and idle air control valve

 

 

i sent ya a reply overon yourfirst posting[new members]

seve97 Enthusiast

seve97

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i tried the gap at .40 it does run clean but once i i go full throtle engine sounds like it need more power ill wait for it to cool down before i change the gap to .45

throtle is clean but did notice spark plug 3&6 were wet and dirty, im guessing thats why it misfires, could it be that the cap is foulty. ive only tried autozone brand maybe they dont last long

2COR517 Enthusiast

2COR517

Posted
Posted

AC Delco are the only brand to buy for plugs, cap, and rotor. For wires, AC Delco are good, but expensive. NAPA Premium Blue wires are just fine, and cheaper. Have you cleaned your MAF?

seve97 Enthusiast

seve97

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i gaped them at .55 runs good dosent misfire much but i talked to a friend today he says it might be the injectors for piston 3&6 that may have something there that wont let them close since the spark plugs are always wet but there is still a good ignition ill check it some more to see wat happends thanks though

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