Question about 1999 Isuzu Trooper

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1999 IsuzuTrooper is idling too high while driving.

1999 Trooper is idling too high all day while driving. A sensor was replace and it stop for a couple of months and has returned. What is the name of this particular sensor and is this really the only problem?

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  • 69 Answers

By the sound of it...the fuel mixture is off...did you get a reasnt tune-up?

Posted on Jul 21, 2010

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Posted on Jan 02, 2017

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I have a 1999 Chevy Malibu LS. It has "idle system high" reading on PC. I was told to replace idle control valve and that was a dead end. I then replaced the throttle position sensor and the problem still...


ECM might be sending the wrong signal to the Idle control Motor. Verify the signal into the motor. A vacuum leak can cause high idle also, listen for air leaks. Just thought of this, make sure something is not keeping the throttle plate stuck open. Debri or some other obstruction.

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I have a 1999 dodge dakota, manual 5 speed, 5.2L V8, The problem I am having is the idle when standing still is about 1100-1200rpms. When driving and I depress the clutch or put in nuetral the rpm's...


The most common cause of high idle is an intake air leak. It will cause a lean condition to the O2 sensors and the PCM's solution is to increase the fuel mix resulting in faster idle. It can also cause a Check Engine Light if the idle remains too high for too long. Do a smoke test or soapy water test around the intake manifold and throttle body. If you detect any leaks, seal them and try again.

May 18, 2017 | 1999 Dodge Dakota

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My 1995 isuzutrooper dies for no reason, I have replaced the fuel pump and it still dies for no reason after driving only a few miles . it does not show a check engine code. ??????


try clearing the pick up in the fuel tank and check the fuel lines for block ups and even small pin holes on the pickup fuel line can draw air and cause this problem try running it from a makeshift tank see if this solves your problem

Mar 21, 2011 | 1995 Isuzu Trooper

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I have replaced the throttle position sensor, egr valve, o2 sensors, mass air flow sensor, fuel system, and my 99 trooper idles high, and shuts off


Check the Idle accelerator valve located on front side of throttle body, it is either stuck or needs cleaning real bad, this is what controls your idle speed, by letting small amount of air in. It has a plunger on it that moves back and forth slowly to adjust amount of air mixture, it is controlled by computer. Unplug it and just turn on key and check for voltage.This valve gets real gummed up, probably need to take apart throttle body and clean. HUNT

Jul 12, 2009 | 1987 Isuzu Trooper

1 Answer

93 trooper idles high then check engine light comes on then idles down


There is a sensor in your car telling your computer to light up your check engine light. When your car drives okay it is usally associated with a faulty switch or sensor. Probably oxygen sensor

May 11, 2009 | 1993 Isuzu Trooper

1 Answer

Engine idles way to high,fuel regulator all ready replaced


check your maf sensor could be dirty or needs replacement

Apr 17, 2009 | 1999 Isuzu Trooper

1 Answer

1999 ISUZU TROOPER has intermitant problem and sometimes depending on the weather it will idle between perhape 200rpm and 1500rpm, I changed the tps sensor and went away for a few months but it is back, I...


 An electronic throttle control (ETC) system to control an idle speed of an engine includes an accessory that increases a load on the engine and a controller that generates an idle request signal based on the increased load.
Your going to have to get your Isuzu scaned. the code is P1511 which is a defective ECT. Sorry I can't help you with more but it sounds like this may be the problem. 
Good luck and hope this helps

Apr 09, 2009 | 1999 Isuzu Trooper

1 Answer

Isuzu trooper engine stops while driving


If its the 3.0 diesel it could be the rail oil pressure sensor starting to pack up .

Jan 21, 2009 | 1999 Isuzu Trooper

3 Answers

98 Isuzu Trooper stalls on cold start, idle issues..


I had the same issue on my 99 Trooper.

It would usually start when completely cold, but idle around 2k RPM.
It would drive fine. But if I shut it down, ran into a store, and came back out, it would start but immediately idle.
Had to ride the gas a little to get it into gear.
The Check Engine light has been going on and off for 6 months or so.

I took this to my local trusted repair shop (no Isuzu dealers within 200 miles).
The diagnosed the light, and found that the Intake Gaskets were bad or leaking.
The idling problem was related to the car not being able to control the amount of air coming in.

They replaced the Intake gaskets by the next day, and I haven't had a problem since. And no more check engine light, which has been on half a year.

Here's some details from my bill:
(1) Intake Gasket set $107.95
Misc materials $21.00
2.1 hours of Labor

The total cost to me was $345.00, and I definately don't feel gipped.

Jan 06, 2009 | 1999 Isuzu Trooper

1 Answer

Replacing transmission fluid


If it is automatic you put fluid in through the dip stick tube for the tranny.If it is standard you put oil in through the fill plug on the upper side of the tranny.Hope this helps

Sep 22, 2008 | 1994 Isuzu Trooper

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