triangledog

I have a 2000 cherokee sport 4.0 84,300 mi starts fine when cold ,even extreme .When operating temp reached has long crank to start ,runs fine after starting ,replaced fuel pump ,still same ,checked coolant sensor resistance 20.53 approx 50 deg [f] ,623 at operating temp is this normal ?, thanks for any help

joeriggs

I'am Having the same problem. I talked to a tech at a local jeep dealer and he said to change the fuel filter because it has a check valve in it.He said they have also changed the pump's in the past to fix this problem and failed to do so but the filter worked.I'am going to try that first.

CCKen

20.53 Ohms at 50*F coolant temp is too low. It should be around 17,990 to 21,810 Ohms resistance at 50*. 623 Ohms at operating temp looks to be in the ballpark.