Question about 1993 Isuzu Trooper

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1992 isuzu trooper 3.2 DOHC 4X4 LOW IDLE GOES UP AND DOWN 750 RPM TO 1500 RPM

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  • Anonymous Aug 15, 2008

    idling too fast

  • Anonymous Mar 21, 2014

    when i turn the heater fan on the idle keeps surging

  • Anonymous Mar 21, 2014

    the idle surges up and down.then it will rev up to 2000 rpms and stay,until i go and stop again . sometimes turning the fan switch on makes it surge to

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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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1 Answer

Whats oil pressure on 3.1 isuzu


4psi idle (bad) and revving to 3k does what, you didnt say.
what was idle RPM 800 or 400>?
the answer is different by hot and cold oil
and oil type, no type stated (do not say brands) 10w30?
running 0w are you>?
and is as low as 8psi hot. at idle ,that is if idle speed is at spec.
is it?
and 3000 rpm would be like 25psi hot, and more cold.
the max pressure will be the pump regulator value.

here is the sensor spec.

The sensor closes when the oil pressure drops to between 4-7 psi (28-48 kPa).

the oil type and bearings clearances (in total) dictate pressure.

3,1 CPC engine spec is.


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Jun 17, 2014 | 1994 Isuzu Trooper

2 Answers

2001 isuzu trooper 4x4 TOD 120K - rpm surge while cruising


I doubt VERY much just replacing the converter is going to solve that problem. Get a second PROFESSIONAL OPINION.

Mar 19, 2017 | 2001 Isuzu Trooper

2 Answers

Rpm hunting


check for a vaccuum leak this is where i would start if it rolled into my shop. possibly a PCV valve sticking or a hole in the hose, this hose should run from the valve cover, or crank case and then to the intake, or carb.

Apr 25, 2010 | 1998 Isuzu Trooper

1 Answer

1999 isuzu rodeo LS: Revs high sometimes then revs low to the point it stalls. goes back and forth , won't maintain a level idle. I have to press the gas pedal so it won't stall, so either im stalling at a...


Do you have a check engine light? Which engine? My 1996 Trooper with a 3.2 D.O.H.C. is awful for plugging up the E.G.R. I have cleaned it several times! Good Luck!

Mar 21, 2010 | 1999 Isuzu Rodeo

1 Answer

When fan belt slip the rpm sticks


Normal...

The RPM is token at the alternator.
When the belt slips, the alternator turns at lower speeds too, and thus the RPM shows low.

Change those belts, quickly!

Nov 01, 2009 | 1992 Isuzu Trooper

1 Answer

Idle speed high


Sounds like the tps (throttle position sensor) is either defective, or out of adjustment. Need an oscilloscope to check, so see a mechanic. Could also be vacuum leak. check lines for cracks and leaks

Oct 19, 2009 | 1990 Isuzu Trooper

1 Answer

What years auto transmission fit a 1999 4X4 Isuzu Trooper Limited w/TOD power/winter drive?


Isuzu changed trooper models in 1998-99 if yours is the older type then 1992-98 if the newer type then 99-05

Oct 11, 2009 | 1999 Isuzu Trooper

2 Answers

Just bought 1998 hyundai elantra with 96K miles on it. engine light came on and when i stop at red light, the rpm goes down and car starts vibrating. it gets better when i put it to park. anyone can help...


Sounds like the ISC (Idle Speed Control) which is adjustable.  The secondary idle needs adjustment to prevent the car from wanting to stall at low speeds.
Greg

Jun 19, 2009 | 1993 Isuzu Trooper

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