Reply With QuoteOh yeah, the stomp test shows all clear
John
Rough Idle
My 95 530ia with 156K was giving the check engine light. After numerou$ visits to my indy, replaced O2 sensors, decarbonized, disconnected the cold start air pump, replaced the air flow sensor, it was running fine.
Now, 3-4 months later, I have episodes where the engine idles roughly while in gear at a light, a/c makes no difference, putting in neutral helps a little but still there, although it runs well as I accelerate. At times it will be fine, other times it's back. It seems independant of engine temp or climate.
Any thoughts on where to begin?
Thanks,
John
Oh yeah, the stomp test shows all clear
John
5-10 Grand Master
Originally Posted by john neuhoff
Idle Control valve?
Grand Master
Nikasil or Ausil block?
Bellevue WA
90 535iM - not much stock remains. 3.7 liters, ported head, cammed, 3.73 diffy, M5 brakes, MAFed, yadda yadda yadda
86 Porsche 951 - Track Toy
I'm not familiar with that, I'll look in Bentleys. Any clues to offer?
Thanks
John
The block was replaced at 100K, so alusil, right?
John
Green Beret Special Ops
check for vacumm leaks,
also could be the PCV plate at the back of the intake... total PITA to fix but only 40 bux.
95 E34 530I V2.37
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Those who make peaceful revolution impossible will make violent revolution inevitable.
John F. Kennedy
Big, Big Time Poster
I have the same thing, very rough idle. I'd think it was leakdown if I didn't know it was a alusil block replaced sometime in '98 or '99. I've got new motor mounts on order (my PS pressure hose was leaking all over it), but it's probably something more involved - idle control valve or f*ed up timing or something.
Ex-Calypso Red 540i owner
thanx
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