JDSfastGN
Well-Known Member
- Joined
- Jun 16, 2001
- Messages
- 3,506
Ok guys I consider myself pretty savvy with these cars but I need some ideas. Ive posted about this before but haven't found a fix. My 87 does not want to just fire up and idle by itself. It has been this way for years. After a minute of keeping it running it will idle but at around 600 rpm or so. Once its warmed a bit and gone into closed loop it will idle itself up to 1000 or so and be fine for the rest of the trip. I have reset the IAC 100s of times lol to no avail. I can up the idle enough to get it to run but then my closed loop idle is 1500 or so which obviously isn't gonna work. I have tried 3 different delphi and delco IACs, TPs(set to .42) swapped coils/modules, plugs, wires, ecms, chips etc... This has been ongoing for 8+ years and is present even after rebuilds and HG repairs etc.. So I rule out vacuum leaks or anything like that. I will try and post a power logger file of the start up for yall to see as soon as I replace my transmission rear seal. I will say when its warm and in closed loop the IACs are 000. If I adjust the IAC to read the proper 10-20 then the next time i start it up cold, it idles very very low. The cam sensor has been out enough to rule its installation out. Im just frustrated because all 3 of our other buicks fire right up and run normal even after sitting for a week. Any other ideas?