1994 Cadillac STS smoking

Tiny
DEVILDAN
  • MEMBER
  • 1994 CADILLAC STS
  • V8
  • FWD
  • AUTOMATIC
  • 249,000 MILES
I put some Pennzoil octane booster max performance in full tank o gas bacause call was sitting for 1 year it ran fine for the 2 months I have been driving it. After adding booster it started ideling rough, today it started smoking first at stops and then at high speed also burned tru gas way way to fast. Put more gas went on highway seamed ok. Put more gas and not smoking all the time. Could it that somethine in fuel tank? Thanks dan
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Friday, April 17th, 2009 AT 4:48 PM

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Tiny
RASMATAZ
  • MEMBER
Get the fuel injection system flushed out
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Friday, April 17th, 2009 AT 5:30 PM

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