We have had previous discussions about this car. Though the car performs in a diminished capacity but adequately on level ground, it is getting more and more difficult to climb long hills, after which the engine heats up hotter than usual and can sometimes boil over if turned off immediately afterwards. It cools down if left to idle for a minute or two before shutting down after a long climb. At slow speeds on level ground it surges and slows, the idle does the same thing at a stop with the car in drive and feels like it may stall on the ebb of the cycle but idles up and even when taken out of gear, although the idle is not as smooth as it used to be and is higher than spec's. Refer to past posts for more back ground and measures already taken.
After some research and discussion, I thought it might be the timing chain but that was ruled out along with a head gasket by a mechanic who test drove it and did some basic checks in the shop. Then I thought it might be the throttle position sensor (which it does have) and he ruled that out as well. He told me there is little information on that model and he didn't have an electronic module that could do a read out on that one anymore. He gave no suggestions as to what it might be.
My other vehicle is almost ready for the road and I planned to work on this Chevrolet once the insurance is transferred. But now I do not know what to work on. If it is not timing or TPS, if it is not a head gasket, in view of what has already been done what on earth could be causing these symptoms? The engine is good. It's quiet and doesn't burn oil even on start up. I have noticed, with the right side windows open that it will ping a bit going up hill (if that is any help) and stop and ping a bit and stop. It is an H series engine equipped with a quadrajet electronic carburetor.
have the same problem?
Monday, June 12th, 2017 AT 11:11 PM