Smoke on Acceleration

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Mar 10, 2006 | 08:38 PM

larrynash

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Smoke on Acceleration

My 95 LT1 has been smoking for years on wide open throttle. I've replaced wires, opti cap, plugs and O2 sensors. Most recently I cleaned the throttle body n replaced the gaskets and checked fuel pressure. Mileage is 140 k and fuel economy is poor on the highway (about 20 MPG). Idle is smooth and there are no codes. Can anyone help??

Mar 10, 2006 | 09:01 PM

Morley

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From: GA

What color is the smoke? Blue, black or white?

Mar 10, 2006 | 09:07 PM

larrynash

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smoke color

It isn't oil (blue). It is gas. I didn't mention it never burns oil and passes NJ state emissions without a problem every time.

Mar 10, 2006 | 10:03 PM

Morley

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From: GA

Might have an injector (or more) leaking. Try running some Sea foam through it and see if it helps.

Mar 11, 2006 | 10:31 AM

larrynash

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Fuel Cutoff

I picked up some Seafoam this morning. Does anyone know when the ECM cuts off fuel flow? Is there a chance the transmission is shifting too high? Would fuel cutoff cause puffs of smoke?

Mar 11, 2006 | 04:53 PM

Morley

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From: GA

don't know about the 95's but the 93 LT1's fuel cutoff is set to 5851 rpm.

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