MancheKid86 Posted February 11, 2013 Posted February 11, 2013 like above, noticed the engine idling at 1000 rpm latley, didnt think much of it then i turned the key over but didnt engage the starter, the fuel pump didnt stop pumping, any one know whats up?
87manche1 Posted February 11, 2013 Posted February 11, 2013 Engine bay if u don't have ac by the battery its the center relay of the 3 if u do have ac its the second from front of the four
87manche1 Posted February 11, 2013 Posted February 11, 2013 http://www.justanswer.com/jeep/4phno-jeep-grand-cherokee-laredo-1989-jeep-cherokee-larado.html
87manche1 Posted February 11, 2013 Posted February 11, 2013 Its either stuck or the ecu isnt operating properly and constantly sending voltage
Eagle Posted February 11, 2013 Posted February 11, 2013 ECU? I thought the fuel pump relay was triggered by the fuel pressure regulator. What year MJ are we talking about, anyway?
87manche1 Posted February 11, 2013 Posted February 11, 2013 Fuel pressure reg is vaccum operated no electronics. Ill recheck my books but 95% sure signal to relay comes from ecu
cruiser54 Posted February 11, 2013 Posted February 11, 2013 Fuel pressure reg is vaccum operated no electronics. Ill recheck my books but 95% sure signal to relay comes from ecu Pins 85 and 87 are fed by the ECU. 87 power and 85 ground.
JMO413 Posted September 23, 2018 Posted September 23, 2018 Did you ever figure it why this was happening? I currently have the same problem.
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