I have noticed that after driving the car when I turn it off, then turn it back on within about 5 minutes.. I will start to get a cloud of grey smoke exiting my exhaust, it smells very much like burnt gas.. It started to happen after I installed my high flow cat( I think).. It also occured while resting at a gas station after three hours of driving.. My car was on the dyno and read 11.49 on the afr. I'm turbo, for only 4k miles.. Some friends tell me it could be blow by gas..

What do you think guys???

 

Anyone???

 

like a brief smoking, or a constant smoking?

 

It's a brief smoke for about a minute.. It becomes a huge cloud of smoke.. But, after it settles and I get no more smoke..

 

if a turbo is smoking at certain times, it's often going to be a drain issue. Check for: PCV venting properly, oil drain kinks, etc. check for shaft play in the turbo. It could be a bad turbo seal.

After you check those things, maybe compression check...

 

My turbo is a greddy turbo and has only 4k miles..Do u think a catch can would help?? And should I do the compression Check???