Smoke????
03-25-2008, 08:19 PM
#1
Smoke???? just bought a '00 trans am ws6...it has headers with no cats slp lid and other little bolt ons..billy lawer tune....if i run the car up around the rev limiter and keep my foot in it it will smoke when i let off and if i get back in it its smokes a little right then...my guess is that for the pcv catch can it has a air tool filter...car still runs like a top but i would like to know why it smokes....if i rev it up that high it will also smoke a bit...car has 90k on it...PLEASE HELP!!!
03-25-2008, 08:39 PM
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You don't have cats... It's the unburnt fuel.. And if you are reving the absolute dog **** out of it, then it could be oil.. everyone knows that the good ole LS1 can be notorious for some oil burning... halfway due for an oil change and the "oil low" light came on... I had been raping it every day and this was the reason..
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03-25-2008, 11:43 PM
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03-26-2008, 12:01 AM
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Well it's probably a combination of things. No cat's, headers, 90K miles and revving it you probably will see some smoke. Unless you are losing oil or coolant I wouldn't worry about it.
03-26-2008, 01:12 AM
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it is your pcv system! if it was black smoke it would be normal, like when i do canyan craving my buddy told me my car had black smoke coming out the back, so later i researched and its perfectly normal since i have no cats and since im downshifting
04-02-2008, 12:08 AM
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try the PCV first
we had a similar car come into our shop doing the same thing. The car ran fine under normal driving and still ran like a scalded dog. compression and leak down tests showed that everything was normal with the car. The owner purchased the car from an older gentleman who didnt drive the car that much and drove it fairly easy. We removed the cats off the car and it started puffing blue smoke under decelleration at high rpms. We changed the pcv and it helped a good bit. But it was still blowing a little blue smoke under deceleration. The customer decided to do a cam swap and the problem got worse. In order to sum it up we changed the valve guide seals on the car and it eliminated the problem. we came to the conclusion that since it wasnt driven very often or hard the valve seals got brittle and hard. I believe you can get the viton seals for 20 bucks. what happens is when you decelerate it creates dead cylinder pressure drawing oil through the bad seals. We spoke with a few shops and it seems the 853 head cars seem to be bad about doing this check the casting number on the heads. Nothing a cam swap and seal change wont fix
. Try the PCV first if that doesnt work that would be my guess.
we had a similar car come into our shop doing the same thing. The car ran fine under normal driving and still ran like a scalded dog. compression and leak down tests showed that everything was normal with the car. The owner purchased the car from an older gentleman who didnt drive the car that much and drove it fairly easy. We removed the cats off the car and it started puffing blue smoke under decelleration at high rpms. We changed the pcv and it helped a good bit. But it was still blowing a little blue smoke under deceleration. The customer decided to do a cam swap and the problem got worse. In order to sum it up we changed the valve guide seals on the car and it eliminated the problem. we came to the conclusion that since it wasnt driven very often or hard the valve seals got brittle and hard. I believe you can get the viton seals for 20 bucks. what happens is when you decelerate it creates dead cylinder pressure drawing oil through the bad seals. We spoke with a few shops and it seems the 853 head cars seem to be bad about doing this check the casting number on the heads. Nothing a cam swap and seal change wont fix. Try the PCV first if that doesnt work that would be my guess.