Smoking only @ WOT. HELP!

**kealap** · 01-10-2007, 06:08 PM

I have a '99 SS. Low mileage car, right at 28k. I am the second owner and have receipts to all the work done on the car by the previous owner. Car is from Houston, TX and all work was done at MTI in 1999. Has heads & cam, MAC headers, Borla catback, MTI Lid, LS6 intake, ported TB, etc. I bought the car about a year ago and whenever I am hard on the throttle at 4500 or above I see a good amount of what appears to be blue smoke(oil) shooting out the back. I thought that this was being caused by the PCV system and tried a catch can at first, but oil was still getting to the intake. So recently I got a valve cover breather and plugged the vaccuum port st the manifold. So essentially did a PCV delete. She is still smoking. With all the oil I cleaned out the intake after doing this, I thought for sure this would take care of it. Performance does not seem to be affected, just wondering where this would come from, other than piston rings, but has such low mileage and only smokes @ WOT. Doesn't use much oil at all in between oil changes either. Bout a half a quart. I haven't had it tuned yet for the higher elevation and less humidity of where the car is now, but could it really be causing my smoke issue? Just looking for some help and suggestons. Thanx.

**ss~zoso~ss** · 01-10-2007, 07:28 PM

keep an eye on the oil consumption, and get a tune STAT, even with your mods at sea level a tune is recommended

**mrr23** · 01-11-2007, 04:30 AM

just wondering if it's going overly rich above 4500 rpms. that will produce smoke as well.

**SSwt00SS** · 01-11-2007, 06:05 AM

Originally Posted by mrr23

just wondering if it's going overly rich above 4500 rpms. that will produce smoke as well.

very well could be the case. i have a tune, but my cars runs really rich. oil level is fine, but when gettin on it and high RPM's (5000+) i get the same (smoke look). even at idle you can smell the fuel in the exhaust, and it only oulses out of the drivers side pipe. thank god tomorrow i am installing Stage II heads and Ls6 intake and then taking it for a tune, for which I wil stay there and watch them tune it...

**ss~zoso~ss** · 01-11-2007, 06:13 AM

i'd say you're just running rich

**INMY01TA** · 01-11-2007, 02:39 PM

Most cammed cars without cats emit gas fumnes at idle. Nothing to worry about. Cars with headers and no cats throw out puffs of smoke too. I see it all the time. Just cause there's no cats cleaning the exhaust.