PDA

View Full Version : smoky exhaust


airborne_rex
03-17-2006, 06:41 PM
what would cause white/gray smoke to come out of the exhaust when i mash down hard on the accelerator and give it about 11-13 lbs of boost?

JHensberry
03-17-2006, 07:37 PM
Too much fuel pressure?
What are your MAF readings?
What is your oil pressure at idle hot?
Do you have a scan tool?
Does the exhaust have a "gassy" smell to it?
Improperly cleaned TB and intake?
Normally, white/gray smoke indicate too much FP, a bad oil leak, or a bad MAF like mine had several years ago. Thanks, Joseph.

JHensberry
03-17-2006, 07:43 PM
Sorry, I forgot. Go to the GM/Chevy dealer and tell them you want a bottle of top engine cleaner. This will more than likely piss them off, since it costs less than $10 and they charge people $70 or more to use it. I think it is funny cause the Buick dealer here in town asked me 3 times if that is what I want, LOL. Use the instructions on the website for spring cleaning and give it a shot.

Keller
03-17-2006, 11:32 PM
White smoke is sometimes water or coolant being burned.

Grey or blue may be oil or fuel. Fuel is often more black than grey.

I fear this may indicate a head gasket failure. Perhaps a compression check is warrented if any performance change has been noted.