Quote:
Originally Posted by donbryce
I'll try changing the temperature sender to see if it is sending a false signal to this control module. Perhaps this might be something to look at in your case..I'm not sure which sender to check either..
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I'm trying to identify the appropriate temp sender involved in the idle control...Tom Hundt's
High Idle Hell refers to a "16 deg C temp switch", but the MB service manual diagrams don't mention it specifically...only as the "coolant temperature output from pin 9 of CIS-E control unit". I know it's not the S71 Cold Engine Lockout at "top right rear of engine", or the S25/5 105/115 deg C Temp Switch at "top front of engine" which are both involved in the the climate control system. I'm guessing that it might be the sender near the TVS junction at S29/2x1. UPDATE: Never mind, I've found a clue in an old post: "
You might check by making sure the engine is warmed up and then unplugging the oil temperature switch located down on the right side at the front of the engine, just above the oil filter can. If the idle goes down unplugging the switch, the swith is defective. The terminal on the switch should have continuity to ground cold and be open when warmed (above 16C) up." I'll be checking that out ASAP. UPDATE: Visit
High Idle on my '85 380sl for my self-discovery on this sub-topic.
Quote:
Originally Posted by 450slcguy
Mine did the same thing, but it wasn't broke, the pieces just separated. It took a bit of figuring out and several attempts to put the pieces together again correctly, but eventually they came together and worked just fine. Patients was the key. I had also though about replacing it with a standard metal band hose clamp, but the access to get a screwdiver in a horizontal position to tighten the screw was virtually impossible.
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Crap. That's probably what happened to mine, but the small C-shaped piece that popped off is in a garbage bag now. I'll try to retrieve it, and then see if I can get the clamp parts back together the next time I pull off the Mixture Control Unit and Air Guide. I've been considering a standard hose clamp, but like you said, it would seem impossible to tighten that thing from the very limited access.
Quote:
Originally Posted by ctaylor738
You can get the parts from a dealer or Phil should be able to find them for you. There are actually two pieces, the band and the lock, best to replace both, since it's very easy for false air to enter the system at that joint. I would look up the PNs but the EPC is down at the moment. I will try again later.
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If you can, I would appreciate those part numbers. Even if I get the old one reassembled, I'm not excited about reusing it.
Quote:
Originally Posted by ctaylor738
You did check the air guide very carefully for cracks?
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I gave it a good look, but nothing jumped out at me. I'll be checking it again soon...any particular areas to look for cracking? The edges? The folds? The throat where it's clamped?
I'm also considering doing the full intake manifold removal to clean up the gunk accumulated on the bottom plenum and replace those Manifold Seal Rings (aka rubber donuts). I recently bought one new one to compare its softness to those on the car...and they're quite hard. [Sigh] My
To Do List isn't getting any shorter.