QuestionI am getting good water flow through the system. The original thermostat is a 195, I put in a 180 and received the same results. So I put the 195 back in just incase the computer was advancing the ignition due to the temp not being in the normal range.
Prior to replacing everything I also ran a system flush, and there are no signs of any mineral build up. This problem started slowly and happened every now and then. But now it is everytime I drive the vehicle, or if I let it sit and idle.
I check the Thermistor's Voltage and Ohms reading and they are with in range. Could this be the EGR causing the system to advance the timing. I have also replaced the Cap, Rotor, and Plugs.
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Followup To
Question -
I have a 1994 E-150 with a 351ci. I have replaced the Waterpump, thermostat, Radiator, and Fan Clutch.
The engine heats up to normal then goes over the normal range and back down a couple of time prior to staying on the border of High Normal to in the red. The code I pulled from the PCM are KOEO 33, 133, KOEO 632. I couldn't find the SPOUT Connector to check the timing, but it looks to run with it connected at about 17 instead of 10. What may be causing the temp. to go up and down then stick in the Hot range?
Answer -
Hello and thanks for the question...I'll try to help.
Are you getting good water flow through the radiator? Remember....NEW does NOT mean good. I would suggest trying a different thermostat and go from there.
The spout connector is located near the TFI module .....on the left rear fender.
Erik
AnswerHello and thanks for the reply...I'll try to help.
Just out of curiousity..have you tried grounding the single wire that goes to the coolant temp sending unit. The ECT and sending unit are different. The ECT has 2 wires, whereas the sending unit has only one. It could very well be that the sending unit is faulty.
As far as the codes, the 94's only use 3 digit codes.
I have no listing for the 33 or 133.
The 632 is the over drive switch not being cycled during the KOER test.
Erik
