1985 Corvette Rough Idle

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Jan 10, 2013 | 11:02 PM

kilich

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1985 Corvette Rough Idle

Ive only had the car three days now and it started to have a rough idle, Idk what it could be someone told me its cause im using normal 86 unleaded fuel, They told me to use 93 and it wont do that, but its pinging right now. All stock. 101k miles, Automatic transmission. It has stalled on my twice so far. Suggestions and Advice is Appreciated.

Jan 10, 2013 | 11:52 PM

powerpigz-51

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From: Chewelah Wa

check engine light? codes?

Jan 10, 2013 | 11:54 PM

kilich

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No light, No codes..

Jan 10, 2013 | 11:58 PM

powerpigz-51

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From: Chewelah Wa

Hmmm.....this screams fuel pressure test to start.

Jan 11, 2013 | 12:03 AM

kilich

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Ill get a Gauge and test it tomorrow. If its not the fuel pressure what else could it be?

Jan 11, 2013 | 12:14 AM

popo8

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From: Shillington PA

Def start with the FP... but I want you to know... I fueled up with 87 octane in my 85.... and that was a full tank worth of pinging and even some smoke under hard throttle...

93 in the next tank... right back to normal!

Jan 11, 2013 | 12:16 AM

powerpigz-51

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From: Chewelah Wa

Fuel pump, fuel filter, air filter, plug wires, plugs, distributor cap, timing, failing sensors, bad maf, bad relays, vacuum leaks, loose wires...big list.