Trammisson presure switch - 2003 Jeep Liberty

sound like you have lost presure switch that is supposed to relive presure when presure is high or the belt is too tight putting presure on the bearing causing over heat or oil cooler restricted and not coolling the oil

check on your oil presure switch wire and also have your oil presure measured . could be ur switch is faulty if presure is low change oil pump

Find the ac compressor,and there are two ac lines coming from it,a large one,witch is the low side,and the small one,witch is the high side.Follow the large ac line from the compressor until you come to it.I hope this was helpful,and if so,please rate,thank you.

When the ignition switch is turned on the pcm turns on the fuel pump by energizing the fuel pump relay. The PCM keeps the fuel pump on as long as the engine is cranking over or running.It does this by recieving pulses from the ignition module. If there are no referance pulses the PCM will turn the fuel pump relay off in 2 seconds with the ingnition on.

Most models also include a secondary control path through the oil presure switch witch will turn the fuel pump on after it detects oil presure.cranking time will be longer if the fuel pump doesn't recieve current until oil presure switch contact is closed.

replace your oil pressure sending unit.

CHECK FREON PRESURE IF LOW A/C COMPR WON'T COME ON IF PRESURE O.K, CHECK A/C FUSE, RELAY AND LOW PRESURE SWITCH LOCATED ON ACCUMLATOR.

reason i asked 4.7L engines develop a sludge problem i believe the switch is by the oil filter

make sure you installed correct switch

has the charge been tested< these suffer from leaks, have the system leak tested and then repair and recharge.

Hi ...... First thing to try is replace oil pressure switch if that doesn't work come back. Defective batch of these were fitted.