Tune up started with an idle issue - United Bimmer Community

**dinan540** · 04-07-2006, 08:42 AM

Last night, I changed the spark plugs, cabin filters, oil change and filter, diff. fluid change and tranny fluid. I will change the fuel filter next week sometime. I ran out of time.

She is running smoother, but this morning when I started her up, she idled at 2000 RPM for about 45 seconds and then dropped down to 600 RPM. It was very odd since in the past my cold starts never idled this loud. Any ideas why my car is acting that way?

Storamin · 04-07-2006, 11:02 AM

How many miles does your car have? When I had that problem it was the 02 sensor which failed at 100k. It can fail anywhere at 60k or later.

**dinan540** · 04-07-2006, 12:15 PM

Lee,

My car has 58K. The odd thing is that it happened today. Do you think it was coincidence with the start of my tune up?

**jybute** · 04-07-2006, 01:17 PM

it sound like the lambda control, i had that on my e36
check your fault code.

**dinan540** · 04-07-2006, 01:39 PM

Okay, I will check the fault code. What is the lambda control?

**xsperf** · 04-07-2006, 02:16 PM

hold on, did it jump between 600 and 2000 or did it just stay at 2000 and then finally after a while go back to 600? i would wait like 1 more day, give it a cold start and see if it does the same thing, if its gettin better or worse.. .etc etc

**dinan540** · 04-07-2006, 04:32 PM

It started at 2000 RPMs and was way loud. It is strange since this never happened before. After 45 seconds, it dropped to about 600 RPMs. I was surprised. Could I have goofed up the spark plugs? I don't think I did.

**doughboyea** · 04-07-2006, 04:38 PM

This may seem like a stupid question... and maybe it has no relevance, but, is it cold in Washington now? My car tends to run at higher rpms in the colder seasons, though 2k is really high, but just a thought.

Oh, and curious question, the spark plugs that you put in, were they a third party brand or were they OEM types?

Dough

**Antiburn** · 04-07-2006, 04:50 PM

If it only happened once, and not since I wouldnt worry about it. If it happens every morning then do something about it. Other then that your idle air valve could of gotten jammed. Do what the others said, read out your fault codes then figure out the issue.

Storamin · 04-07-2006, 09:18 PM

Lamba is oxygen sensor over the pond for some reason.

You can also clean out your ICV.

Watch out for the bosch platinums... they wreak havoc with a lot of BMWs

**Rooz** · 04-07-2006, 11:13 PM

pcv valve maybe

?

**c1apton** · 04-08-2006, 01:13 AM

This might or might not be relevant but did you match your spark plug #s? (old vs new) Bavauto lately is substituting platinums for OEMs. I had ordered Bosch OEM 4 electrodes & they sent 2 electrode platinums. I caught it prior to installing but have had friends tell me the same thing about Bavauto. Your "rev" at start up was one of the complaints I heard in conjuction with wrong/platinum plugs.

**Spieluhr** · 04-08-2006, 07:05 PM

yeah, make sure they are OEM copper spark plugs. aside from that, I dont see why any of the things you changed could have affected your ride.

after that check your ICV, and or your O2 sensor.

**dinan540** · 04-10-2006, 10:50 AM

Hasn't done it since the next day. Thanks for the help guys.

Hey Dough, it isn't that cold currently and I have my car in the garage. It seems to have been a freak thing.

**94bmw325i** · 04-10-2006, 11:57 AM

oh the other day I put in bosch platinum 2's... They seem to be fine so far..