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Rumbling, stumbling, bumbling....idle
Please help! My '87 4kS has developed a (new) problem, and being
mechanically ignorant, I could use some advice from the List's
collected wisdom before I drag it in to the shop. Right after
start-up, the idle drops very low, and the engine starts to stumble,
making the whole car shudder like someone's running a jackhammer under
the hood. This corrects itself after a couple seconds, and the car
then runs fine, but it often repeats briefly once I put the car in
gear. It generally doesn't happen if the car is warmed up, but it
sure is annoying, and makes me wonder if there's a serious problem.
Could this be...
1. compression problem? :-(
2. idle stabilizer valve?
3. engine timing?
Any diagnoses/suggestions gratefully considered. Oh yeah, saw a red
200T, Massachusetts tags, on Connecticut Avenue in D.C. around noon on
Saturday. Very nice. Any takers?