When I get the car to finally light up in the morning the car the idle revs are unusually low (500) and then as the car heats up the idle revs increase to 1000 sometimes 1200 or so.

Could this be related to the temp. sensor that monitors the coolant temp? If that is the case, could that also inhibit the cold start value from working properely as well?

Also, when it is cold I have hestitation, most noteable when I round a corner or shift. Any ideas?

Thanks in advance.

Gards

Is your ABS light on?

__________________
-Marty

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
http://www.peachparts.com/shopforum/showpost.php?p=831799&postcount=13
http://www.peachparts.com/shopforum/showpost.php?p=831807&postcount=14

No, but I don't recall off the top of my head if that light is burned out. I am pretty sure that it isn't not burned out.

Would that or could that be an OVP issue?

Thanks,

Gards

When I had a bad OVP it was a horrible cold start then fine when warm except for the ABS. Dont think I had high rpm's like that but I can't really rember.
The OVP should have a fuse you can check but I think it usualy outlasts the rely.

good luck
Marty

__________________
-Marty

1986 300E 220,000 miles+ transmission impossible
(Now waiting under a bridge in order to become one)

Reading your M103 duty cycle:
http://www.peachparts.com/shopforum/showpost.php?p=831799&postcount=13
http://www.peachparts.com/shopforum/showpost.php?p=831807&postcount=14

Thanks for your replies. I did check the ABS light and it does work and is off.

Thanks,

Gards

just happened on this question i have the same motor. when cold it runs from 500 to 1500 and also stalls on every ocassion until it gets hot it also takes some cranking of the starter to fire up. my abs light comes on and it stays on. so where do i look first please regards ken

Just a side note . . . Does this water temp. sensor also responsible for sending the signal to the dash that displays engine temp?

Thanks,

Gards

No that is a diferent sensor. There are three sensors on mine that deal with Temp Stuff. The one mentioned goes to the CIS-E, then there is a single pole one near the water pump that does the gauge, and a three pole one(two poles on one connector and the thrid sitting by itself) that controls the fans. On some that three pole deal is two seperate sensors, one with two poles and one with a single!

__________________
~Jamie
_________________
2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....

I have a similar problem in my 16v to that described in the first post - cold start gives a poor/low idle which improves as the engine warms up.

In fact, the warmer the engine the higher the idle - when over 100 degrees it will sometimes idle at 1400 rpm!!

Ideas?

__________________
190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg

To follow up.. OVP was the cause of a low idle when cold, high idle when warm.

By the way, ABS light won't always be on if your OVP is failed. Particularly on a car with ASD - there are 2 circuits inside the OVP.

__________________
190E's:
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
http://www.maylane.demon.co.uk/190esmall.jpghttp://www.maylane.demon.co.uk/190esmall2.jpg