Rough Cold Idle Problem...out of ideas..
Hi I'm a newbie on this forum and to BMW in general. I recently purchased a 97 528i and started having a rough idle problem on cold starts in the morning. The car will start perfectly and after a couple of seconds it'll start idling rough for about 3-5 min. Since I obviously got the car used I've done the following: new plugs, ccv, valve cover gaskets, new MAF, new coolant temp sensor, new cam position sensor, and I do have the shark injector Conforti software and a CAI.
I've smoked the engine and used starter fluid to look for any vaccum leaks without any success. I've checked fuel pressure on cold start and that seems fine. I've swapped coils with another car to see if that made a difference and it didn't. I've also disconnected the secondary air pump to see if that was the source of the problem and that didn't make any difference either. The only thing that I can think left to do is check injector pressure at cold then warm and do a compression test? Does anyone have any other ideas as to what might be causing this? I'm not sure where to turn next. Any help would be really realllly appreciated. Thanks for any help.
Last edited by Blackcatecho; 03-03-2008 at 10:16 AM.