I got an 1992 olds eighty eight royale from a friend of mine. it wasn't running. It would run but then you would drive it somewhere and then let it sit and it would not start for them. They had taken it to a shop. The shop could not duplicate the problem but replaced the crankshaft sensor hoping that would fix it. The problem continued. I get the car and i put a new ignition module in and it works fine. For a week, then it started missing when idling and die. I changed the plugs, wires, tried another ignition control module, a new computer. The problem persist. It runs fine when cold, after it warms up it won't idle and misses badly. if i am on the highway it is ok. My thinking is that maybe there is a short to crankshaft sensor. I'm not sure what to do. Any help is appreciated.

Really? the idle seems to kick down after it has been running for a bit. it is not until the temp gauge is around 200 that it runs bad. how would i check the idle control valve? Thanks for your help Really? the idle seems to kick down after it has been running for a bit. it is not until the temp gauge is around 200 that it runs bad. how would i check the idle control valve? Thanks for your help

sorry about delay been decorating bedroom and moved computer ,this is one of them sort of things that in all honesty i would need to use the vehicle for a day or so to get the feel then i would be able to have a good knowledge of what could be wrong ,or is it more than one thing or not or something simple like a air leak on a breather pipe or a vacumn pipe . sorry about delay been decorating bedroom and moved computer ,this is one of them sort of things that in all honesty i would need to use the vehicle for a day or so to get the feel then i would be able to have a good knowledge of what could be wrong ,or is it more than one thing or not or something simple like a air leak on a breather pipe or a vacumn pipe .