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Author Topic: 2.5L need info  (Read 1699 times)

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  • Vehicle: xj
  • Year: 97
2.5L need info
« on: November 15, 2022, 08:09:06 PM »

Anyone have info on 2.5L VM eng checking the #1 injector - maybe the ohm's or any inspection ideas.

I'm lost for experiance on this eng, its done at @2000rpm. 



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Re: 2.5L need info
« Reply #1 on: November 19, 2022, 04:19:03 PM »


Have you tried a search on the forum?  The XJ 2.5 diesel with its separate overheating heads has been discussed nearly to death in the past.

Try a few different search terms : VM 2.5,  2.5 diesel,  XJ 2.5 etc....


Jeepless :-( 2006 Chrysler Crossfire Roadster 3.2 V6 - 1993 Yamaha FJ1200


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  • Vehicle: CJ-7 4.2 auto
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Re: 2.5L need info
« Reply #2 on: December 06, 2022, 12:15:18 PM »

Hi,  hate to put a downer on your purchase but you should have bought a 4ltr petrol. Parts for the fiesel will be a nightmare for you to obtain stateside and parts are not really interchangeable with the petrol models. engine and driveline are not the same as the 2.5 or 4ltr petrols.

scan through the search option results will give you an idea of common issues and potential improvements.

No.1 injector is a pain as they are "unique" to the jeep and rely on a set resistance range with will change when the injector gets clogged with soot or the wire goes hard with age. depending on the value you can fool the ECM by adding a resistor. but if you engine wont reve past 2k then i would first check the intake pipe just to the left of the radiator (facing wind shield), these have a metal spiral spring inside the intake pipe as a support, with time this metal spring fails and allow the tube to collapse when going past 2k. replace the pipe or use and old mastic tube which surprisingly is a very good fit (cut to required length)

have fun
XJ 2.5 diesel - dead. XJ 4.0 6" lift - sold to some lucky person
CJ7 4.2 auto standard(ish)
Alfa 147 jtdm
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