850 T5 Estate Erratic Cold Startup Idle

MoSsElMaN · Post by **MoSsElMaN** » 08 Sep 2003, 03:07

Hello folks........i need some help with my 1996 850 T5 Estate OBD II......

Whenever i start the engine from cold, the idle will somewhat be erratic.....it hunts between 1000rpm to 1300rpm. During this period, the exhaust fumes smells very very rich. Its made worse when the A/C compressor kicks in. I've already replaced all the vacuum hoses with quality silicone items....

However the problem is somewhat lessened when the engine is fully warmed up. But nevertheless the problem still remains.

so far i can think of the following problem areas:
1) IAC valve (idle control valve)

btw, the dashboard doesnt have any warning lights on....which for this simple reason leaves me clueless?

Guest · Post by **Guest** » 08 Sep 2003, 07:02

change oxygen sensor or

as posted sonewhere else, unscrew oxygen sensor, burn with welding torch and then clean with brake cleaner. seems to work for that fella. no guarantees you just might crack open your sensor if you the rate of increase/decrease of temp is too fast.

Post by **matthew1** » 08 Sep 2003, 10:08

Get the codes read if you can -- not all codes trigger dash lights. And check vacuum lines.