Finally got the new plugs and fuel filter in. I will be putting them in tonight or tomorrow.

I tested the 2 pins on the temp sensor and it is coming back zero. I am assuming that is bad.

EDIT: If you have a 2 pin sensor, you should be reading pin-to-ground, not pin-to-pin. The 2-pin was supposedly phased out in 9/89. What does your connector look like? Is it a fat connector with space for 4 pins or is it two seperate connectors?

Of course, alldata is showing a 4-pin sensor, not a 2 pin, and WIS shows both. Are you sure you're checking the right sensor? I'm showing one for the gauge and the one for engine control - the one for engine control is near the back. Wiring diagram also shows 4 pins (2 resistances); should be 2.2-2.8Kohms @ 68degF.

If you have the 2 pin connector and a bad ground, that could easily cause bad readings to the CIS & EZL, because ground is what it's using instead of the other 2 pins.

__________________
A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.

The one I tested is between Cylinder 4 and 5 on the drivers side of the engine and is blue with two pins coming out. Do you know what that is? It came back as 0. That is strange it looks the same as the one I saw on an online store for the coolant sensor.

I just pulled the larger plug at the back of the engine. It has four pins. I will test that one as well.

Thanks

Honestly, no clue what you tested.

__________________
A.S.E Tech A1,A6,A7,A8 & MVAC 609 + EPA 608

Unless stated otherwise, any question I ask is about my greymarket 1985 380SEL.

Sounds like you tested the wrong component. The blue base, 2-pin sensor you tested is the CTS for high aux fan operation. You want the big 4-pin CTS with a fat black connector, located on the driver side back at cyl 6. Pull off the black connector, and test ohms on diagonal pins at various engine temps. Compare results against the table shown in the FSM. That CTS is actually 2 identical thermistors contained in a single assembly. Pins 3 and 4 are ground, 1 and 2 are signals. One signal goes to KE controller, the other to the EZL controller. The values you get from testing diagonally should be virtually identical to one another at each temp point, indicating that both the fuel and ignition management computers are getting the same readings at the same temps, but from different resistors.

Edit: Sorry, I just noticed that you already figured this out. But you really need to do the test at various temp points to know that the resistors give good readings throughout the entire operating temp range of the engine.

__________________
1988 California version 260E (W124)
Anthracite Grey/Palomino
Owned since new and still going strong and smooth
MBCA member

Past Mercedes-Benz:
1986 190E Baby Benz
1967 230 Inherited from mom when she downsized
1959 220S Introduced me to the joys of keepin' 'em goin'

There are only 10 kinds of people in the world--those who understand binary and those who don't