Question about 1999 Isuzu Trooper

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Hi, i having problems with the idle speed on my izuzu trooper 98 when the the engine is still cold there's no problem but when it gets hot the idle speed becomes below 500 rpm and unstable thanks

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You should have the codes pulled if the check engine light is on. if its not on it sounds like a idle control valve

Posted on Apr 26, 2010

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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

1 Answer

Normal idle speed when cold once hot low idle speed


will be a sensor problem need to get the OBD read by a suitable mechanic

Mar 12, 2014 | Renault Cars & Trucks

1 Answer

How to change transmission fluid and add transmission fluid in 99 Izuzu trooper


Check this URL; http://autorepair.about.com/library/a/1i/bl729i.htm It applies to a '98 Trooper, but I'd guess that your '99 is the same.

Oct 01, 2013 | 1999 Isuzu Trooper

1 Answer

1993 izuzu bighorn hard to start then dies like no petrol, when it does start blows black smoke like running rich ?


check injectors for leakage when engine off-will have to install fuel press gauge run engine and check press ,turn off engine and whatch gauge -see how long it takes for press to drop,will cause hardstart hot engine-but should start better cold

Sep 19, 2009 | 1993 Isuzu Trooper

1 Answer

1989 IZUZU TOOPER NOT GETTING ANY FIRE


Need to have the Coil packs and the Ignition Control Module tested at someplace like auto-zone. I'm willing to bet thats your problem.

Feb 17, 2009 | 1988 Isuzu Trooper 2 Door

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

Leaking water and releasing pressure help!!!


Follow the top radiator hose, to the housing on the engine. That's the thermostat, it is actually 2 housing bolted together. remove the 2 bolts, and pull up on the housing. Flip it over and check the gasket. If it's bad, it will leak coolant all over the injectors.

Sep 18, 2008 | 1990 Isuzu Trooper

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