So i have a bmw engine in my Vanagon: M10 to be precise. Has a header, running N/A.
I Was trying to diagnose a starting issue, where the van would start rev up to idle then die.
After a few of these starts it will idle ok, at around 1100. Holding it at revs above idle at any time in this sequence
worked as well, it wouldn't stall, only at idle.
So im looking around and found someone hosed clamped a smaller tube in the line from the intake boot elbow
to the ISV. I removed the smaller tubing. (It is the 2 wire long version ISV.)
Now the engine is idling super high at 2200 and when i unlplug the ISV it just revs HIGHER.
It seems someone was too cheap to buy a new ISV and used the 'restricting tube' to manage the vacuum to the ISV
instead of letting the ISV do it.
Thoughts?
I think the ISV may be burnt out.. Electrical tests will proceed.
-BMWvan
I Was trying to diagnose a starting issue, where the van would start rev up to idle then die.
After a few of these starts it will idle ok, at around 1100. Holding it at revs above idle at any time in this sequence
worked as well, it wouldn't stall, only at idle.
So im looking around and found someone hosed clamped a smaller tube in the line from the intake boot elbow
to the ISV. I removed the smaller tubing. (It is the 2 wire long version ISV.)
Now the engine is idling super high at 2200 and when i unlplug the ISV it just revs HIGHER.
It seems someone was too cheap to buy a new ISV and used the 'restricting tube' to manage the vacuum to the ISV
instead of letting the ISV do it.
Thoughts?
I think the ISV may be burnt out.. Electrical tests will proceed.
-BMWvan
Someone restricted flow to ISV. now it idles ar 2200 rpm!
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