1990 Cadillac Seville ENGINE SURGES WHILE DRIVING

78,000 MILES • V8 • FWD • AUTOMATIC
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8008MAN
  • MEMBER
  • 4 POSTS
While driving my 90 Seville, under a load or just cruising. The engine almost feels like it slightly stumbles and then surges forward. Its not extremely noticeable but to me, very annoing. I have had a recent tune-up, 3 injectors replaced, new crank shaft sensor. The gas mileage isn't what it used to be (about 14 mpg) It almost feels like a cylinder is cutting out, but it seems like it would be more noticeable then it is. Any help would be greatly appreciated.
Feb 15, 2008 at 2:14 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Start by getting the fuel pressure and throttle position/MAP&MAF sensors checked out.
Feb 17, 2008 at 6:30 AM
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