Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
SOURCE: 1990 oldsmobile 88 Royale
hi hurdle
im dave
how do you know fuse is good?
sometimes just looking at it doen't prove that
you need to check it with a test light on both blades with either the brake pressed or the signal on. both sides of the fuse should light
SOURCE: which years/models trannys interchange 1990 olds delta 88 royale
any gm olds , buick caddy, pont, 4speed auto up to 1991 u just got make sure theyre not computer controlled some 91 are n some aint stay away from 84 to 88 they had failures it doesnt really matter about engine size as along its same transmission
SOURCE: I have 92 Old 88
Poss crank sensor or ignition mod.
Dont remember which terms to cross with the paper clip... been awhile!
Depending on where you are located... alot of shops do a cheap test or even free to throw the comp on!
SOURCE: 98 Olds 88 starting problem
I know it sounds crazy but check to see if the floor mat is blocking gas pedal. I have seen this alot in my 30 years as a master tech.the way you describe it sounds like all the other cust of mine that had the same issue. hope that is all it is. good luck and let me know.
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