M103 idle surge ... STILL - PeachParts Mercedes-Benz Forum

tilac1 · #1 11-06-2015, 07:23 AM

I got so sick and tired of trying to get a decent, consistent idle, I removed the IAC valve and replaced it with a plumbing gate valve from home depot, I think it was 3/4" but I cant remember. It fit perfectly inside the hoses and secured with hose clamps. Air cleaner hides it. Set it and forget it. Low tech but works great.

Stretch · #2 11-06-2015, 09:30 AM

Quote:

Originally Posted by TnBob

Still dealing with this POS.
Ohhh yes, the high idle was solved leaving behind the infamous 'surging idle'

There has to be a very special group of German engineers who gather at least annually to laugh at those they left behind to deal with their incredibly bs style of so called engineering.

...

Quote:

Originally Posted by tilac1

I got so sick and tired of trying to get a decent, consistent idle, I removed the IAC valve and replaced it with a plumbing gate valve from home depot, I think it was 3/4" but I cant remember. It fit perfectly inside the hoses and secured with hose clamps. Air cleaner hides it. Set it and forget it. Low tech but works great.

I too sympathise with the frustration of M102 / M103 idle troubles

Bob - when do you get the surging?

Does it happen immediately from cold?

OR does it happen after you've been driving?