c32used

Pretty much when I do a search it pulls up the usual culprit so now I turn to the more knowledgeable forum members for help my issue is as follows


basically my SC keeps shutting off which made me think its the IC pump which I had replaced but even on the same day it was replaced within a half hour of driving I experienced the same shutoff again... Now it does appear to work fine at cool engine startup temps but maybe its somehow getting hot thus maybe the SC is being shutoff by car safety systems will changing the SC relay help in fixing this issue? I replaced Johnson CM30 with the same but this basically tells me maybe there was nothing wrong with it to begin with...

any help please.

ScottW911

I really know very little about the technical working of our S/C's but I would assume that there is a thermostat that is talking to the computer to tell when the IAT's are too hot.

Is it possible the thermostat is defective?

TemjinX2

does it only happen when its really hot outside and not happen when its cool?

FrankW

thermostat +1

or it's your stock heat exchanger not able to cope with the higher IAT that the 185 would bring?

Gramma_Benz

Are you able to do any logging of your IAT's?

I just got a REV Application for my iPhone, total about $200 and it's awsome.

Do you have any cooling mods?

c32used

A MB mech told me no to thermostat thanks

c32used

I am having car data logged tomorrow...I have an LET HE and Johnson pump

c32used

BTW guys I been motoring my average temp while driving and my temp shows 90 and under at all times I been told by the MB mech try changing the relay for the SC since I replaced the IC pump already. Basically it works and it doesn't no mater temp or duration of travel. It works and I gun it later and nothing it's truely strange

c32used

Well I wish it was a stock HE but mine is a LET HE

c32used

Any temp anytime...let me put this way car is fine one minutes then all of the sudden SC just cuts off like if IC pump is faulty. Then try later on same drive and it's fine.

FrankW

test the voltage of the i/c pump wires. could be the i/c pump not even getting power which is a relay issue. I've seen it happen on E55s.

c32used

I'll have it checked tomorrow thanks

Newzchspy

Gasoline Vic?? What brand and octane???? Still runnin that old 87 Citgo

c32used

c32used

Anyone have a diagram where the SC relay may be? I was told there doesn't appear to be one but the tech is looking..

c32used

It was a popped fuse from trunk fuse block

Since fuse was popped when SC was cool it worked fine but since IC pump didn't activate when car asked it to well it caused SC to not activate as a security measure. How it popped But tech who worked on it told me that it could have been the other IC pump I had causing a load due to starting to fail...which the way he explained it seemed to make more sense then my explanation lol

TemjinX2

glad you got it fixed and it was cheap fix..lol.

rockjock

It probably popped when they didnt disconnect the battery when they swapped pumps, plugged the new one up-started the car and first time around she went....I've done it just like that a couple times