i have a 1992 chevy g20 350 tbi and it idles fine, but once in gear it misses through all speed ranges no check engine light on,i can also hear a pinging or knocking but only when driving, help?thanks

Asked by Jul 10, 2016 at 11:54 AM about the 1992 Chevrolet Chevy Van 3 Dr G20 Cargo Van Extended

Question type: Maintenance & Repair

I replaced the fuel filter plugs,rotory,cap ,coil, it idles fine but when driving it misses lacks power and also knocks or pings loud but only with a load on the engine, any help I would greatly appreciate
thank you

2 Answers

18,520

Try adding some fuel injector cleaner to gas tank and use the middle grade gas if you use the low grade gas all the time. Do not need to run the middle grade gas all the time but do use occasionally.

150

Fuel injectors, CAT, O2 sensor or EGR vacuum related.

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