Question about 1993 Isuzu Trooper

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1993 isuzu bighorn diesel engine holds revs to 3000 rpm for about 30 seconds and then dies

1993 isuzu bighorn diesel engine revs to 3000 rpm will hold for about 30 secondsand then stalls, has new injectors, fuel pump, filter.

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Do you think the primary fuel filter under the tank could be blocked or water is in the fuel?

Posted on Mar 25, 2014


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Posted on Jan 02, 2017

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SOURCE: 93 isuzu bighorn

a temperature sender located at the thermostat housing was found to be faulty sending permanent earth to tranmission making the overdrive gear inoperable . when replaced the vehicle achieves 100kph from 2500 rpm as true.

Posted on Sep 19, 2008

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SOURCE: Isuzu bighorn diesel 4jg2 engine timing diagram

This site has it .

Posted on Aug 25, 2009

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I have an isuzu npr it's a 6/91. Wednesday night at idle the truck revs itself up maximum rpms. What would cause this is it something to do with the fuel?

wow, a real photos, how cool, like the 2nd one here ever or 1st.
but in what country? this is USA forum, with zero data on
cars not here.
the problem is what engine is there.
diesel or gas.
and what is the displacement.
we have like 1000 posts here on NPR , an not one answers even 1 question asked, i cant guess why or whats UNDER that hood.

hot engine races
cold or both?
what engine.
what RPM is high, 1000, or 3000 ?
if gas engine, vacuum leaks top that list.
on diesel? , injection problems many.

it has to do with air and fuel controls on all injected engines.
if gas, it can even be, OMG a CARB fueled.

Feb 17, 2016 | Isuzu Cars & Trucks

1 Answer

Isuzu bighorn diesel

run the fault codes to find the reason for the engine light and the transmission light

Mar 14, 2014 | Cars & Trucks

1 Answer

How much oil does a 1993 isuzu bighorn 3.1 turbo diesel take?

Not sure. easyest way to find out is call nearest autozone and they will be glad to tell you.

Aug 12, 2012 | Isuzu Cars & Trucks

1 Answer

My 1997 Isuzu bighorn (trooper) appears to "miss"

When is the last time a tune up was performed on the vehicle? I would get some amsoil engine foam, and use it as described. Also get some fuel system cleaner and use that as well and go from there.
Thank you,

Nov 30, 2010 | 1994 Isuzu Trooper

1 Answer

Ticking noise from engine

The most common reason is the hydraulic valve lifters. The short term fix is to

a) replace the oil and filter if this has not been done recently.
b) Rev the engine to 3000 rpm and hold for 30 seconds. This pumps up the lifters and helps clear old oil.
c) do this 2-3 times until the clicking stops.

The longer term fix is to replace all 16 lifters.

Other more expensive reasons are
a) a big end bearing. This sounds more like a hammer on anvil hit, and its louder if you blip-rev the engine. Rev to say 2000 and back off slightly and the noise stops. The fix is a replacement engine or engine rebuild.

Nov 27, 2010 | 1994 Eagle Talon

2 Answers

My isuzu is 1996 bighorn . problem is check engine light come on engine stopped . how to read DTC .

Not sure about DTC but Diesel Bighorns have a real problem with cooking their alternators which present with similar symptoms to what you have described.
Hope this helps.

Apr 14, 2010 | 1995 Isuzu Rodeo

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

Turbo timer installation 94 isuzu bighorn


May 03, 2009 | 1994 Isuzu Trooper

1 Answer

93 isuzu bighorn

a temperature sender located at the thermostat housing was found to be faulty sending permanent earth to tranmission making the overdrive gear inoperable . when replaced the vehicle achieves 100kph from 2500 rpm as true.

Sep 18, 2008 | 1993 Isuzu Trooper

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