Question about 1990 Isuzu Trooper

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Bad idle how to scan 1990 isuzu trooper, where is the OBD port? when i start truck in morning i often have to rev it up well passed 1000 rpm before it starts idling properly, problem comes back several times through out the day...especially after driving fast. i have noticed that fuel economy has gone down since the problem started occuring, there are a few holes in exhaust system before the cat, and leaking oil as well cheers

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 8 Answers

SOURCE: 1992 isuzu trooper 3.2 DOHC

I had the same trouble with my 93 Trooper.

I went on a sensor-changing spree.

The one sensor that fixed this idle problem was the throttle position sensor.

You can get one here.

Throttle Position Sensor

It's very easy to change, and fixes the problem instantly.

Good luck.

Posted on Sep 19, 2008

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fischmilch
  • 96 Answers

SOURCE: IAT sensor

The intake air temperature sensor can be found in the air intake duct, or threaded into the intake manifold depending on which engine you have.

Posted on Nov 10, 2008

losflip
  • 94 Answers

SOURCE: fuel pump

On all Trooper II models the fuel pump is located in the fuel tank, fuel tank must be removed to access.

Posted on Nov 26, 2008

losflip
  • 94 Answers

SOURCE: 1990 isuzu trooper belt tensioner replacement

No it is standard, loosen to left.

Posted on Nov 30, 2008

  • 1 Answer

SOURCE: isuzu 2001 diesel engine won't start

cant start deisel 3.0 lilter sounds like there is no fuel getting to the engine

Posted on Feb 15, 2009

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2 Answers

Why does 02 camry idle high when started?


It only revs up when u start the first in the morning? If so, it is normal, once it warm up it will back below 1000 rpm.

Jul 26, 2014 | 2002 Toyota Camry

1 Answer

Engine no power at cold..after warm up ok..if you rev. it at 2500 rpm then off the pedal engine dies..


Could be an issues with the Mass Airflow sensor and the idle valve. If the vechile is setting off a check engine light take it into Auto Zone or a similar store they will scan the codes for free and give you a print out of what is wrong

Nov 26, 2011 | 2001 Isuzu Trooper

1 Answer

Engine is dying on idle


quick test , replace a piece of the fuel line with a clear plastic one, chaeck for air bubbles especially with less than half tank

Jul 28, 2010 | 1990 Isuzu Trooper

2 Answers

Have a code p0401 how do u fix it , I know it has something to do with the egr system but I,m not sure where its located on my trooper, engine size is 3.5 v6


I have a 2000 Isuzu Trooper that had a PO401 code that would reset and then 2 miles later the light was on again - I found if you remove the EGR valve and start the engine that the engine should idle rough - If it doesnt and you have vacumn at the intake port spray carb cleaner down the port slowly and see how long it takes for the engine to run rough - Keep spraying till the engine dies and spray some more down the passage and let the engine set for 5 minutes and then restart the engine - it will run rough at first but clear out - you should be able to feel the engine RPM change when you put your finger over the intake vaccumn port for the egr - If not then repeat the cleaning method again - If you do feel the rpm change then put the egr valve back on and clear the code and run your drive cycle to see if it is fixed.

Dec 17, 2009 | 2001 Isuzu Trooper

1 Answer

Difficulty to start early morning


I had the same problem, early morning rough idle. I changed the idol control sensor. Real easy part to change, usually about $100 for the part. My engine was teh 2.8 in 1990 Trooper. Hope it helps.

Jun 19, 2009 | 1990 Isuzu Trooper

1 Answer

Engine hunts and wont idle properly


If the RPM's fluxuates at an idle at all times you have a bad spark plug or a bad spark plug wire

May 29, 2009 | 1990 Isuzu Trooper

1 Answer

Idle speed too high


Look under the plastic intake tube for a hole

Nov 19, 2008 | 1990 Isuzu Trooper

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