nk530
03-17-2006, 05:35 PM
I recently aquired a 94 530 with 190,000 mi.
The car is truely unbelievable, with one small exception.
This problem, from what I've found on various forums, is fairly common.
I am hoping that if I can give a clearer explaination maybe someone can help me pinpoint it. Problem is as follows:
Car starts in cold (below freezing) weather just fine. I usually let it warm up about a minute before driving, but if I let it idle for longer than that the check engine light will come on. Some times it comes on, and as soon as I step on the gas it immediately goes off. Sometimes it comes on and won't go off until the car is up to temp. And occasionally it dies when the light comes on, or starts a really rough idle. All these symptoms go away when the car achieves its normal operating temp.
When the light comes on and goes immediately off I was able to get a 1214 code from a stomp test. When the light stays on for a while it is most likely a 1213.
o2 sensors are new, and I can't find a vacuum leak anywhere.
A mechanic who looked at it said there was a low signal from the ecu and the air mass meter, but I don't know how much I can trust the guy because of other things that the shop has screwed up.
let me know if any further info would help, and thanks
nate
The car is truely unbelievable, with one small exception.
This problem, from what I've found on various forums, is fairly common.
I am hoping that if I can give a clearer explaination maybe someone can help me pinpoint it. Problem is as follows:
Car starts in cold (below freezing) weather just fine. I usually let it warm up about a minute before driving, but if I let it idle for longer than that the check engine light will come on. Some times it comes on, and as soon as I step on the gas it immediately goes off. Sometimes it comes on and won't go off until the car is up to temp. And occasionally it dies when the light comes on, or starts a really rough idle. All these symptoms go away when the car achieves its normal operating temp.
When the light comes on and goes immediately off I was able to get a 1214 code from a stomp test. When the light stays on for a while it is most likely a 1213.
o2 sensors are new, and I can't find a vacuum leak anywhere.
A mechanic who looked at it said there was a low signal from the ecu and the air mass meter, but I don't know how much I can trust the guy because of other things that the shop has screwed up.
let me know if any further info would help, and thanks
nate