Hi Rich, Impressive methodical approach! a professional auto electrician couldn’t have done the troubleshooting any better. I’m sure you found the culprit... episode 2, will no doubt confirm this is the problem. Cheers!
Thanks Philip, hope you are well. I received some help and tips from the mye28.com gurus on this one. Can't believe I went this many years without a multimeter, it was time to learn to use it!
Something I found is that if it's sometimes idling just above 1500 RPM (not necessarily surging) it's likely the Throttle position sensor. If it gets unplugged, it thinks the car isn't idling and defaults to about 1600 RPM. I gave my connector a wiggle and pushed it in a bit and the idle went right the way down to about 900. Now I've noticed it's surging a little bit, but not as bad as yours is. I'll try diagnosing the ICV at some point.
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Hi Rich, Impressive methodical approach!
a professional auto electrician couldn’t have done the troubleshooting any better. I’m sure you found the culprit... episode 2, will no doubt confirm this is the problem.
Cheers!
Thanks Philip, hope you are well. I received some help and tips from the mye28.com gurus on this one. Can't believe I went this many years without a multimeter, it was time to learn to use it!
@@BIMMERZEITTyou know where you can get a replacement? mine gets stuck. saw a NOS part for $450
I love your videos! Keep it please!
Something I found is that if it's sometimes idling just above 1500 RPM (not necessarily surging) it's likely the Throttle position sensor. If it gets unplugged, it thinks the car isn't idling and defaults to about 1600 RPM. I gave my connector a wiggle and pushed it in a bit and the idle went right the way down to about 900.
Now I've noticed it's surging a little bit, but not as bad as yours is. I'll try diagnosing the ICV at some point.
Thanks for that ours is idling at 1800. I wonder if it's the tps instead of idle control.
that's a nice e28, enjoy it man
mohammad benattia thanks!
I WISH I WATCHED THESE VIDEOS 2 DAYS AGO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Thanks
Your idle control valve looks completely different than mine, or others I've seen on these cars. Is it original BMW?
Yes it is original BMW, it’s only found in the 533i, 633i and 733i - early model cars. Later versions have an aluminum body.
I replaced the ICU, tested the leads, replaced the IC module and still no luck