WHOA... that idle speed is WAY too high, sounds like there is a massive vacuum leak somewhere. i believe your engine's natural idle speed is between 700 and 800 rpms.
I have searched through everything on this topic (and there is a lot), but there does not seem to be anything I can find to help diagnose my specific problem....
On a cold start, my E34 will idle at 1,500. After it warms up, the idle goes up to 1,800 and runs perfectly. On a cold morning (below freezing), it does the same thing, but I have a lot of difficulty getting it started. It has always started so far (fingers crossed) but sometimes takes 5 - 10 tries, holding the key for 20 secs or so. It does not always happen, but on enough occasions to make me wonder if I will get to work !!!
Any suggestions for this??
Thanks,
DJ
WHOA... that idle speed is WAY too high, sounds like there is a massive vacuum leak somewhere. i believe your engine's natural idle speed is between 700 and 800 rpms.
Alusil, Dinan DME | ITG Air Filter | Eibach/Bilstein HD | 26/20 Swaybars | Iridium plugs | Depo/ProLumen HID | Optima batt. | no AC | Stoptech brake lines, Frozen rotors, brass bushings, Superblue
agreed! Look/spray for intake leaks
95 E34 530I V2.37
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Those who make peaceful revolution impossible will make violent revolution inevitable.
John F. Kennedy
Really??Originally Posted by BillionPa
When I questioned my "BMW mechanic" he said that it should be this high for an automatic, and a standard has lower RPM
Christ, no. My automatic 525i idled at about 850rpm. Sounds like a serious vacuum leak -- check the rubber intake boot and all vacuum hoses for cracks -- or a sacked Idle Control Valve.Originally Posted by kwbimmer
1997 535i V8
5spd, OBC, A/C, cruise, BMW phone, factory M-Tech wheel & suspension, 18" Alpinas
sounds like the "mechanic" needs to read his manual.
cracks after the air flow meter in the intake boot, or a punctured or disconnected vacuum hose would do it, possibly a cracked intake manifold or disintegrated gaskets.
i think there is a spring in the idle control valve. if it corrodes to nothing then any signal to open it will open it completely like when you are starting the car, and the idle will jump to 1500ish...
Alusil, Dinan DME | ITG Air Filter | Eibach/Bilstein HD | 26/20 Swaybars | Iridium plugs | Depo/ProLumen HID | Optima batt. | no AC | Stoptech brake lines, Frozen rotors, brass bushings, Superblue
Also see my posts on the fuel line check valve here:
http://www.bimmer.info/forum/showthread.php?t=28670
You may have both intake leaks and fuel drain back problems.
I don't want to anger any of the grand masters but my boot was cracked and all it did was give an annoying hissing sound. My idle was still constant at around 900 rpm's. I would eliminate that part as a suspect.Originally Posted by BillionPa
Jeff
I prefer to be misunderstood rather than having to explain myself all the time...
thats why i added more places to look, because a crack in the boot can still be throttled by the ICV. i really have never seen an idle that high caused my any kind of intake leak, there is most likely more to the problem.
Alusil, Dinan DME | ITG Air Filter | Eibach/Bilstein HD | 26/20 Swaybars | Iridium plugs | Depo/ProLumen HID | Optima batt. | no AC | Stoptech brake lines, Frozen rotors, brass bushings, Superblue