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Discussion Starter #1
Hello i have a 4.9 sts is there anything else that would cause white smoke out exuast besides head gasket , i have
no leaks which iam aware they can leak internally in the block and burn off through exuast but i have no leaks , radiator stays
full even while running , coolant has not gottin low in 2 days , well its never been low , no over heating , hard starts but starts on secound try easy with a rough to normal idle , before prob car started 1 key turn easy like it was waiting for me to start her up lmao ! Anyhow theres no coolant in oil checked with oil change inspected old oil iam stummped on whats going on head gasket no warning lights, i pulled codes only E055 which is TPS showed up and iam not sure if a TPS would cause
these issues runs idle rough while at lights and upon green smokes until i hit about 35MPH then Goes away till i stop again
weird huh !! Well thanks for the 411 any would be appreciated
 

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White Diamond '03 DHS (with DTS floor shift)
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87,184 Posts
Re: 1992 cadillac Seville STS 4.9L

:welcome:

White "smoke" could be coolant, oil or unburnt fuel vapor. What does it smell like?

P.S.
I edited your title to make it more descriptive. "1992 cadillac Seville STS 4.9L" doesn't tell the reader much.
 

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Discussion Starter #3
Re: 1992 cadillac Seville STS 4.9L Smoking

Hello Thanks Ranger ! the smell is like fresh gas with a smokie flavor lol ! Really rich i have to leave my garage open for a while
till it fades away few hours ive never had major engine probs basic mait daily checks i try to keep it running right always check out pics on my profile not bad high gloss black on black 22' now with a head prob maybe lol ! Anyhow thanks for the edit also ,
getting it look at tomorrow my machanic will be back in town will post results also !

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Anyone else wanna chime in on a similar situation or suggestions of what possibly wrong doeznt hurt just more knowledge for all us car people thanks again Ranger !
 

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97 ETC x2, 04 GXP, 04 STS x2, 97 ESC, 99 Deville, 05 SRX
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2,603 Posts
Re: 1992 cadillac Seville STS 4.9L Smoking

Be careful you don't have an injector leaking into the cylinders. If that happens you can hydro-lock the engine and damage it.

Ranger is right, coolant or excess fuel & vapor.
 

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1994 SLS x 2 ---- 1993 Eldorado Sport ----- 1994 Deville 4.9
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1,540 Posts
Re: 1992 cadillac Seville STS 4.9L Smoking

First thing to check is the fuel pressure regulator.
Pull vacuum line look for fuel.
If the problem is not found there; Then move on to a fuel pressure and pressure drop test.
 
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