FredrickPatton
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- Nov 1, 2014
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I have a 90 ranger with a brand new 2.9 in it and I cant seem to figure out why its surging at idle. Ive ran the computer and I got a code that says the coolant temp sensor is out of range and im not sure if that is telling the computer to act this way. Also not sure why the temp sensor isnt responding because it tested 3.74 ohms wich I thought was good unless im testing it wrong. Ive been over every possibility I can come up with. I cant find a vaccum leak, tps sensor tested good, iac tested good, new plugs wires cap and rotor. I didnt replace the harmonic balancer and the rubber ring has cracks in it so im not sure if that would cause it but I figured it would be shaking all the time if it was off and it doesnt so im not sure about that. Any ideas?