300E Cold start issues - PeachParts Mercedes-Benz Forum

pawoSD · #7 07-02-2009, 03:27 PM

Quote:

Originally Posted by MattBelliveau

Economy guage sits in the black at idle. I noticed that the parts page shows two different temp control sensors, the one described above, and one at the air filter housing. Could that by chance be the one missing in this picture? Could this be part of the problem? Thanks.

I don't believe a 1989 model has that sensor....your intake tube may have been replaced at some point, and the later ones have a sensor there (mine does)....thus the hole. If it is not dangling around below there then I doubt yours has one. The sensor at the back of the engine is most important to the computer to run the engine properly. It needs a 22mm deep socket to be removed, and you need a proper inch-pounds torque wrench to put it in to the right torque (not much) so you don't damage anything.