Any idea what this part is? Has 4 leads, and looks like a solenoid but can't find it in Haynes or other manuals I have.

Not sure if the first photo took, so uploaded it again...

http://imageshack.us/photo/my-images/833/dsm1g20.jpg/
http://img593.imageshack.us/img593/8655/dsm1g20.jpg

Thanks,

Bob

"Bruce Esquibel" wrote in message ...

Guv Bob wrote:

Thanks Gareth. Yes, checked already. Vacuum, electrical connections,
mechanical etc., all seem to be OK. It's definitely in the electronics.
Car groups are good but gotten better help with auto electronics from
these elec groups.


It's a 22 year old rice burner, doesn't the junk yards still give $50 for
them?

I don't know if this applies, but the description of the symptoms is nearly
identical to a problem a freind of mine had with a same vintage (1990)
pontiac.

After trying everything you listed you've done, including swapping out the
computer/brain box, something lead him to the magnet sensor thing on the fly
wheel.

It wasn't the sensor itself (that was replaced) but the magnet glued to the
flywheel. Turned out it cracked, causing the pulse it sent to the computer
was distorted or too narrow to get an accurate reading.

While cold, the reading is ignored, along with some other sensor readings
until the engine came to operating temp, once it got into the picture, the
idle speed went up and varied.

Keep in mind the pulse was still being sent, but apparently deformed and
however it was translated into a reading, was off enough for the computer to
think it was idling too slow.

-bruce