| It could be the coolant temp sensor. This sensor sends signal to the fuel and the ignition computers and if it does not work, the car is switched to a limp mode. On my 87, 260E, this is the last sensor on the engine, towards the windshield. If you measure the resistance across the sensor, it should be between 2.5K and 3.5K when engine is cold and between 250 and 350 ohms when the engine is warm at 80 deg C. On my car, this sensor is a 2 pin sensor, but some cars have a 4 pin sensor. The resistance then would be measured across terminals that are diagonally opposite to each other. |