92 YJ, 2.5. New fuel pump, new temp sensor, new fuel filter, new crank position sensor. Stalls out from time to time, primarily in warmer weather. No leaking fuel lines detected, good pressure at the rail. Any pointers?
Fuel issues
- Thread starter Griffin1
- Start date
when it fails did spark go away?
at fail did ASD drop out. (a test)
if spark was good at fail then a fuel pressure gauge is next. test #3 here /now.
at fail did ASD drop out. (a test)
if spark was good at fail then a fuel pressure gauge is next. test #3 here /now.
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btw the dribble test only can prove a dead fuel pump if dry,
the list of ASD drop causes 1992.
i've published this vast times now., ASD drips iF?
So you found spark dead? even see tachometer RPM needle not rise a tad cranked, (means CKP dead)
ASD RELAY drops after closing 2-3 seconds, or is dead (swap horn relay to ASD relay slot)?
The ASD drops out of SPARK is or went dead,(detected) by law and by NO CRASH AND BURN ,events
see FSM page 8w-72 (yj sheet 3,11,14)
1:CKP dead (crank sensor.)
2:CMP in distributor, (on newer cars its on the CAM shaft,my 2010 jeep yes)
3:the PCM, ( ASD monitor pin)detected ASD output overloaded (too much current, amps)A142 feed yes.
A:COIL spark, primary shorted.
B:: on or more injectors shorted (the wires on them love to.)
C:02 (oxy sensor) shorted heater or its wire to it shorted to exhaust pipe, easy
D:Some years have Alternator pin ,A142 that shorts and same deal happens,. Alt, pin C shorted.
just one of 50, causes, of stalls or don't; start. (even one lose rusty wire, in the EFI system)
cranks fast, for sure.
the list of ASD drop causes 1992.
i've published this vast times now., ASD drips iF?
So you found spark dead? even see tachometer RPM needle not rise a tad cranked, (means CKP dead)
ASD RELAY drops after closing 2-3 seconds, or is dead (swap horn relay to ASD relay slot)?
The ASD drops out of SPARK is or went dead,(detected) by law and by NO CRASH AND BURN ,events
see FSM page 8w-72 (yj sheet 3,11,14)
1:CKP dead (crank sensor.)
2:CMP in distributor, (on newer cars its on the CAM shaft,my 2010 jeep yes)
3:the PCM, ( ASD monitor pin)detected ASD output overloaded (too much current, amps)A142 feed yes.
A:COIL spark, primary shorted.
B:: on or more injectors shorted (the wires on them love to.)
C:02 (oxy sensor) shorted heater or its wire to it shorted to exhaust pipe, easy
D:Some years have Alternator pin ,A142 that shorts and same deal happens,. Alt, pin C shorted.
just one of 50, causes, of stalls or don't; start. (even one lose rusty wire, in the EFI system)
cranks fast, for sure.
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tell all, tell when it works and fails both, (i guess only hot days , now gone)
can you make it fail? on demand? in any way, if yes then do the tests when it fails.
spark is first (if engine known to be good, gee it is old)
and learn the PCM cuts fuel if it DETECTS spark loss in any way shape or form. up to 12 ways it can.
only fuel pressure gauge TOOL finds spec. pressure, (failing) 41psi cranking per the FSM , in the sticky .
can you make it fail? on demand? in any way, if yes then do the tests when it fails.
spark is first (if engine known to be good, gee it is old)
and learn the PCM cuts fuel if it DETECTS spark loss in any way shape or form. up to 12 ways it can.
only fuel pressure gauge TOOL finds spec. pressure, (failing) 41psi cranking per the FSM , in the sticky .
if it stalled did it restart easy?
ever do a full tune up in 60k miles. (tune up parts for spark and filters?)
if will not restart, try cranking with 5% added right foot throttle to hide the dead IAC? (lack of air means no start)
same vein, crank at WOT, wide open throttle, this is magic EFI cut fuel mode, called unflood my engine.
if all this fails test for spark loss.
ever do a full tune up in 60k miles. (tune up parts for spark and filters?)
if will not restart, try cranking with 5% added right foot throttle to hide the dead IAC? (lack of air means no start)
same vein, crank at WOT, wide open throttle, this is magic EFI cut fuel mode, called unflood my engine.
if all this fails test for spark loss.