I just bought an 2003 Isuzu Trooper 4jx1 model last month. Lately I started to experience an engine shut-down when ever I try to run it on cold engine. I also notice that it is hard to start when the vehicle is in a downward slope. When it starts, the idling is very poor as if it will go off if I try to push the pedal. The smoke is white when the engine is cold but no smoke when engine gets warm. Thanks in advance!

SOURCE: isuzu 2001 diesel engine won't start

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

SOURCE: 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.

SOURCE: My Isuzu Trooper 2004 4JX1 turbo just underwent a

check the alignment of the camshafts..make sure the marks were aligned correctly.

Simon

• 235 Answers
• Posted on Apr 20, 2009

SOURCE: My Isuzu Trooper 2004 4JX1 turbo just underwent a

The ECU will be fine with a engine rebuild but the 4JX takes a bit longer to start if all the injector oil paths are empty - can be up to 5 or 6 mins of 20 second cranking bursts.
Also if you rebuilt due to diesel in the oil from bad injectors the control valve for the injector oil pressure may be faulty so it wont start.

SOURCE: loud tapping/knocking noise from fan belt/rocker cover

Do a compression test first.find out where you stand with the engines condition. If you think its coming from the belt area directly, then remove the belt/s and manually spin and wiggle each pulley. Try to see if anyone of them have a bad bearing. Let us know.