I have a 2550 2WD with the 239ci 4 cyl engine. The coolant temp gauge pegs when hot. I use a laser temp gun and it reads anywhere from 190 to around 210 on the inlet and outlet from the radiator depending on how hard I run it. Gauge starts jerking back and forth then pegs. Been doing this for a few years and I have not yet found the cause (I suspect the tach assy). Is there a good second port where I can install an aftermarket temp gauge or should I just pull the existing sender and put the aftermarket one there?
So far I have replaced the sender, and traced wires thru the bulkhead connector with no joy. I think the issue is in the tach/gauge unit. There is condensation on the face so I am betting it needs to be pulled and rebuilt. Not a good time now.
John
So far I have replaced the sender, and traced wires thru the bulkhead connector with no joy. I think the issue is in the tach/gauge unit. There is condensation on the face so I am betting it needs to be pulled and rebuilt. Not a good time now.
John