Question about 1992 Isuzu Trooper

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Why does 1992 isuzu trooper runs for a few seconds then stalls and won't keep running? I've replaced the fuel pump,fuel pressure regulator,and fuel filter. Spark plugs and wires have been changed also

Why does 1992 isuzu trooper runs for a few seconds then stalls and won't keep running? I've replaced the fuel pump,fuel pressure regulator,and fuel filter. Spark plugs and wires have been changed also.

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  • Isuzu Master
  • 20,706 Answers

Hot or cold engine or both?





which engine, to work on one, you need to know what it is

and what EFI system it uses. or its all just a crap shoot.

no new distributor cap and rotor why skip the full tune up,. why?



first questions.

1: can you save the stall with a a fast right foot.

2: why change out pump etc, if fuel pressure is at spec, a $20 tool would have saved you 5 hours hard labor and bath in fuel? why?





Stalls 101.:



the engine can stall for over 50 reasons are you going to do all 50?

surely not. why not consider diagnosis.. as a path.

1: car stalls, right foot saves it. and can drive fast if i keep foot busy.

a: ISC stuck closed.

b: EGR valve stuck open (depends on which engine options)

c: low compression on one or more cylinders.

2: can\'t save it from stalling (right foot)

a: fuel pressure is low. (wires bad.)

b: lost spark, for any reasons.

c: lost 12vdc to the EFI system( killing spark and fueling)



stalls.

hot or cold or both

stalls, can save it or not, hot and cold

hot restarts are easy and it runs good hot,yes./no.



there is lots more to it, then just stalls. lots more.

Posted on Aug 31, 2014

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Posted on Jan 02, 2017

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5LTRBTR
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SOURCE: 1997 subaru Impreza sport won't stay running . stalls after minute replaced Fuel pump,filter spark plugs wires ,cleaned injectors checked fuel pressure what next

check your grounds. I find many easy fixes by cleaning all the grounds around the engine bay. I would also check the ground at the fuel pump connector that wiring is prone to corrosion and breakage

Posted on Feb 25, 2013

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1 Answer

1996 trooper turns over but wont start


A few things to check:
  1. Did you repressurize the system after replacing the fuel pump? THIS IS THE MOST COMMON ISSUE. You must cycle your ignition switch from OFF to ON several times before first start after depressurizing the system;
  2. Has the vehicle been bumped hard, violently jarred, or in an accident? RESET THE INERTIAL SAFETY SWITCH;
  3. Are you getting correct fuel pressure? If not, replace the fuel pressure regulator.

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yes sir mostly its a fuel pump regulator problem .
check the fuel pump pressure to make sure it is the pump regulator that controls the amount of pump pressure or change the whole pump would be better have a good day sir

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