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Old 02-09-2010, 12:50 AM
Benz sage's Avatar
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Join Date: Mar 2008
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Continuing CIS-E troubleshoot

I just pulled the good OVP Relay from my other 86 190e and installed it. I tried soldering the old OVP's terminals but think it was still weak


The new OVP Relay helped a little, but now the the car is running rich. I had to unplug the cold start injector solenoid or the car would flood with gas until it loaded up and stalled within a minute of start up. I pulled another cold start injector from my 88 parts car and will change it if necessary, but I believe it maybe a CIS-E related.


I also noticed that now, when I start the car, the vacuum (economy) gauge will move about a third of a gauge of vacuum when cold. Is this common ? – I don't remember my 86 5 speed doing this at startup.
Is this the cold air valve fudging up or the signaling process?


Also I found a circuit diagram for Automatic transmission up shift solenoid that interacts with Wide Open throttle switch on gas pedal, from a Benz website. Would this circuit have anything to do with the car's lack of performance? (some type of internal conflict?)


I realize that someone can't expect much from a $900.00 car, but I am trying to learn the CIS-E related problems, so when an immaculate 300 series comes along with CIS-E problems, I can beat the owner up on the purchase price.


I have had an 82 Rabbit convert for over 5 years, and have never had problems with the mechanical CIS, but am impressed with the fuel economy of the CIS-E.

Benz Sage
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Last edited by Benz sage; 02-10-2010 at 10:51 PM.
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