Quote:
Originally Posted by maxwedge
A obvious misfire can do this, plugs should be replaced usually by 75k if they are Plats. Dirty throttle body, gummed up idle air control, any vacuum leaks, bad fuel regulator allowing fuel to enter the vac. hose, are possibilities. Also sticking EGR.
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1997 Riviera - 139,452 miles
Thanks for that. I'll start with the spark plugs.. already bought a set. Some of the vacuum lines (to fuel rail) are just about 'shot.' Trouble is the right angle 'diameter reducer' hose fittings are hard to find!
The dealer is recommending Induction Service again. It's been 5-1/2 years and 35k miles already since the last IS.
Thanks,
-Ed