Engine Mechanical problem
1993 Buick Lesabre 6 cyl Two Wheel Drive Automatic 155000 miles
I bought this car with a statement that it needs a new throttle position sensor per the previous owner's mechanic. The car was idling extremely high. It would accelerate and hold a speed of about 45 mph without touching the gas. I had the TPS replaced and it was fixed for about a month. The car began idling very high again sporadically. Sometimes it would idle normally after sitting at a stoplight for a little while. Other times turning the engine off and restarting would temporarily fix it. The engine light did not initially come on, so my mechanic could not get a trouble code. We replaced the idle air control valve with no improvment. We found that by forcibly pushing or twisting the plug/tps the idle would change. We replaced the tps and the plug. The car ran fine for a few weeks. The problem again recurred with the same progression as before until it would idle high all the time. The engine light came on after a few more weeks. This time I took it back to my home town to a trusted mechanic. He stated the tps was at fault, and a coolant leak was causing the sensor to go bad. He took off and cleaned the throttle body, replaced all gaskets/seals, the tps, and the plug. It ran fine for almost two months and again started behaving the same way. The is no coolant leak. I took it back to the home town mechanic. He showed me the tps code, and showed how tapping the accelerator changed the tps setting from less than 1% to over 1%. He said he could not fix it. I had a local mechanic replace it again. It has only been two days and is idling high again. All these parts have come from Autozone and are made by Wells. It has been swapped under warranty 3 times, but I am still paying labor. This problem has got to be rough on my engine, brakes, and gas mileage. Please help! Oh, we also sprayed stuff around the intake looking for leaks and both mechanics say they can't find a vacuum leak.
have the same problem?
Sunday, June 29th, 2008 AT 8:40 PM