Question about 1992 Buick LeSabre
My 1992 Buick Lesabre is sometimes high idling and then switches to low idle and dies. I can be driving at 65 and it just shuts off. I have tuned it up, all fluids are new, new battery, new throttle positioning senser. It now is starting to not open the automatic windows. There is also a back light that will not dim down. When it idles down, you can smell gas. But the pump works fine. Also a new feul filter was installed. The check engine light now is staying on instead of going off and on. It also will not talk to the computers that were hooked up at shucks auto supply. It whould not even acknowledge it. Please help!
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Here are the more common cause of surges, stalls at stops, slow idle speed, erratic idle, 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
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