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popping noise from exhaust

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Old 05-09-2020, 02:25 PM
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Car: 1985 IROC-Z
Engine: 350 TPI
Transmission: T5 manual
popping noise from exhaust

with the car at idle it randomly has a sharp popping noise sporadically, any ideas what could be causing it?



Old 05-17-2020, 03:43 PM
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Car: 86 IROC-Z, '71 RS
Engine: 305 TPI/ 350
Transmission: 700R4/TH350
Re: popping noise from exhaust

I'm thinking it sounds like cavitation. How's your timing?
DR.K.
Old 05-17-2020, 04:27 PM
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: popping noise from exhaust

Popping in the exhaust is ONLY possible if there's raw unburnt fuel.

Replace your spark plugs. NOT "check"; NOT "they're only [fill in the blank] old"; NOT "I know they're OK"; NOT NOT NOT NOT NOT NOT. Replace.
Old 05-17-2020, 06:38 PM
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Re: popping noise from exhaust

And if sofa is wrong on the plugs, I'd check the cam lobes next..
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