SOURCE: 1996 buick regal over heating
Hi,
This sounds normal to me..... Except "runs to hot when idling"
When you're driving about (airflow over rad) all seems fine, but when sat in traffic idling - the fans come on to cool. Is the problem that even with the fans running, temperature still goes up - and fans never turn off again?
Is this the problem?
If it is, then the coolant pump may be badly corroded, not driving efficiently, or the coolant needs flushing and replacing.
SOURCE: 1991 buick regal starting and running problem
Sounds like your car is overheating. If you have a temp gauge it should show that. If you just have an idiot light, by the time it comes on it's already too hot to operate. AFTER the car is cooled down, open the radiator cap to see how much coolant has been lost. Chances are there is alot missing. Add WATER (no sense in adding coolant if it's going to leak out) and idle the car at home. Look underneath as it warms up to find where the leak is.
SOURCE: 1991 Buick Regal 3.8L Belt Tensioner
Remove belt and unbolt center pulley bolt. I believe it's a backward theaded bolt. Turn to the right to loosen.
SOURCE: ENGINE IDLES ROUGH, BUT RUNS FINE WHILE DRIVING
Check all vacuum lines for leaks. Check spark plug wires for and spark plugs that may be worn and causing idle misfire.
SOURCE: I have a 1991 Buick Park Avenue. Runs rough in
Here are the common cause of surges, cold stalls, 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.
To correct this problem I want you to get a can of intake cleaner (ABOUT $5.00) from any local auto parts store like NAPA or Carquest, do not use carburetor spray, intake cleaner only or u will damage the Teflon coating inside the throttle valve and air bypass valve, 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.
Testimonial: "Thank you, I'm sure if your advice it was I'm looking for. But at least if this works, it will save me a lot money from having to replace expensive sensors."
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