Question about 1987 Jeep Comanche
I changed the heads & the fuel injectors are not working
Fuse power to rail injector must be good check fuses first.
is CEL glowing key ?
ok,no engine stated. this the 4 liter? I6? nah you said HEADS
not 2.5L I4
not 4.0 L I6
so must be V6, really
or the 2.1L diesel....>>>>
and 3 or 4 diffr. EFI systems, im not much help
why folks post engine free ,amazes me....
it takes 2 things.
fuel pressure over 30psi (generic)
and the noid lamp passing on injector.
and the knowledge that all jeeps,(cars) cut fuel (gas)
if the PCM see and errors with (crank for 5 seconds)
4: if IMMO , that too, no imm on 87, think , go lazy to look up.
If the NOID lamps fail x6 (no injection pulses)
then the ASD relay is dropping out)
87 is the really really old RENIX/Benicx injection system. on 4L
i had a 88. same car.
see alldata.com for permissive to inject.
on my old I6 4L Renix sys
the injectors are all grounded , that is correct
and the ECU drives this hot switched ! unlike most cars.
back then the ASD was called the LATCH relay.
if it dont pull in and stay , it will not run.
Ill stop there. until you say what engine and country car resides.
export jeeps are wired different (laws)
Posted on Feb 17, 2014
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Posted on Jan 02, 2017
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