Question about 1994 Isuzu Trooper

1 Answer

94 isuzu trooper turn key fuel pump runs for 2sec.and shuts off?

Not sure if my 94 trooper needs a fuel pump I turn on the ignition and the pump pumps out gas i only know this because i detached the fuel line right before the filter but after about 2sec. it shuts off. if i turn the key off right away and then turn it on the pump doesn't do anything unless I wait a couple of minuites then turn the key on. so I'm not sure if it's a bad pump or something in the ignition thats f**ked up and sending a signal back to the pump and shutting it off. What should I do first?

Posted by on

  • Ryans94 Feb 24, 2009

    so were shoudl i start it ran fine a couple weeks a go and it will run if i hold the throttle to the floor but it seems like it's only running on 1 cylinder and i've had the coil packs tested and theyre fine so is it the ignition control module under the coil packs thats causing the problems if so how do i test it because the parts stores in my area are no help at all

  • mike loshbough
    mike loshbough May 11, 2010

    it is supposed to turn off after 2 seconds but if you crank it the pump will stay on

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Genius:

    An expert who has answered 1,000 questions.

  • Master
  • 1,118 Answers

Can you hear a click during that 2 secounds? Thats the relay shutting off the pump just what its suppost to do. The pump does not run contenuosly, if it did it would burn up, thats what the relay is for, it kicks on and off to maintain the correct pressure to engine as needed. It will not turn back on until it resets itself because engine was not running, thats the way there designed.

Posted on Feb 19, 2009

  • ccn7 Feb 19, 2009

    As i said the relay only kicks on when the engine needs fuel, its an on and off situation. Pump only stays on when the engine needs fuel to sustane the right pressure. Yes its supposed to turn off and then back on when its running, to maintane correct fuel pressure.

×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I have recently purchased a second hand isuzu trooper model 1999 with manual transmission..everything goes on smoothly until one day it suddenly stopped as if it has gone out of fuel and wont start no...


No its not full with diesel fuel this is a common shut off on the isuzu. Plus the valve are always noisy . The crank sensor on those go out easy.This may not be the problem.Go to the back have someone crank it ,or if your hearing is great as you crank it do you hear a hummin noise that will be the fuel pump if you dont then the fuel pump will most likely be your problem.If you hear a humming noise as you turn the key on the fuel pump will not be the problem.Now let check spark. do you have a tach on it (the RPM) if you do crank it if it bounces just a tinytiny bit you have spark and the fuel pump will be the problem. Most common Isuzu trooper failure the ignition module

Apr 21, 2011 | 1999 Isuzu Trooper

1 Answer

My 1990 isuzu troopers fuel pump is constantly running and making the battery go dead even though the key and engine is off. What can be the problem?


Bad switch or someone has bypassed the switch, should shut off when you turn ignition switch off, my 94 does. HUNT

May 14, 2010 | 1987 Isuzu Trooper

1 Answer

My 1990 isuzu troopers fuel pump is constantly running and making the battery go dead even though the key and engine is off. what can be the problem?


start with pulling the fuel pump relay!!
this should kill the power to the pump and save your battery,
so well pulling the fuse but pull and test the relay,, it may have got to hot. if it checks good and clicks when you plug it back in!![key off]
then there is a short in the ignition to relay circuit

Mar 25, 2010 | 1987 Isuzu Trooper

1 Answer

Lost power to engine


Check make sure all plugs are firing. Sounds like what my 93 Rodeo was doing-Idled okay but very rough when in gear. Turns out only 5 out of 6 plugs were firing due to a defective ignition module- 100 bucks later it works fine.

Hope this helps.

Mar 20, 2010 | 1992 Isuzu Trooper

1 Answer

1989 Isuzu troop temp gauge goes straight to hot when key turned


there is a sending unit for the guage.but if it has been running a few minutes and gets hot you may need to check the thermostat or water pump.check the water pump by taking the radiator cap off.then start the vehicle,look into the radiator and see if any coolant is flowing or circulating.do the cheapest fix first

Mar 15, 2009 | 1989 Isuzu Trooper

1 Answer

1988 trooper starts, wont turn off with key


the ignition switches are typical to fail

Feb 13, 2009 | 1996 Isuzu Rodeo

2 Answers

Got a 94 trooper that will not start unless its on starter fluid.


How much pressure is in the fuel rail? It sounds like a weak pump or bad check valve. If your lucky though it could be a clogged fuel filter. Let me know what you find.

Dec 31, 2008 | 1994 Isuzu Trooper

1 Answer

Not firing up


9 times out of 10 the problem is the fuel non return valve not shutting off properly and the fuel runs back from the pump and injectors....needs to be replaced .About €80. Ring isuzu and give them chassis no...you may be entitled to injector set under warranty. All 01 troopers qualify

Eugene

Nov 23, 2008 | 2001 Isuzu Trooper

1 Answer

93 Trooper cranks, but won't turn over


have someone kick at the gas tank while you are turning key if it starts it is fuel pump

Aug 05, 2008 | 1993 Isuzu Trooper

Not finding what you are looking for?
1994 Isuzu Trooper Logo

Related Topics:

437 people viewed this question

Ask a Question

Usually answered in minutes!

Top Isuzu Experts

yadayada
yadayada

Level 3 Expert

63990 Answers

Steve Hurc
Steve Hurc

Level 3 Expert

450 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21990 Answers

Are you an Isuzu Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...