hello all, my car, a 2001, natural aspirated. My problem. It all started a while back with a code that said the egr valve bad. I forgot the exact code, but bought a used one from Harofreak. Code would never go away and always came back when cleared, but car started and drove good, so I never done anything else.
Fast forward about 2 months later, and wife comes home and said car was running hot. Went out and checked and sure enough, was low on coolant. Filled it up, checked it the next day and was very low again. So I discovered that it was leaking at the pulley side of motor. I thought that I had the dreaded LIM failure. After changing gaskets and figuring out that the gasket failures would only result in coolant in the engine
, found the culprit to be the elbows. I had everything back together and it ran great. Even the codes for the egr went away.Fast forward about 2 weeks. I get in the car and go to town, and the idle just started normal, then it would not come down past 1500 when it was in gear. When I got to where I was going and put in park, it shot up to 3000rpm's. I shut it off, go do my thing, come back and car runs like a top. Over the next few days though, my wife informs me how the idle is doing the same thing every time she drives it now, high idle, 3000rpm,s.
Checked for vacuum leaks, found a cracked hose and replaced and no change. Sprayed the starter fluid all around and no changes. Took car to a vo-tech school that my son goes to and they hooked it up and checked everything. all sensors checked to be good, they also sprayed the starter fluid, checked for codes and such. Everything showed to be as it should. the only thing that showed out of wack, it was showing like a 23% vaccum with the engine off. the Teacher and I decided that it had a gasket leak, either LIM, or UIM.
Fast forward 2 days. I pull intake off and inspect gaskets, found nothing out of ordinary. replace gaskets, get everything back together, start it up, and within a couple of minutes it is running at 3000 rpm's again at idle. I am at a loss and have no idea what to do. throttle body and all have been cleaned, cables are not binding up, butterfly is closing all the way.
I have done a search and came up with nothing. One post had my same problems, but did not have a resolution. I sent the author a pm, but he has not responded. He has been on about every day since I sent pm. Do not know if he even got pm, or just does not want to respond. All help appreciated, I have to get this car fixed within 2 weeks, but I am lost as to what is causing this. sorry for such long post.