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Discussion Starter · #1 · (Edited)
Hi everyone.
Long time reader first time poster (in this face-lifted forum ) :)

I´ve been reading a lot of posts regarding misfires on the X-type and I learned a lot thanks to you guys, but apparently not enough .
My X is misfiring on odd cylinders (sometimes 5, other times 1 and 3 ....), so I changed some parts that you guys sugested that could be the cause of the problem (IMT O-Rings, brake booster vacuum hose, breather hose for the intake manifold) but unfortunately it did not work
My car is not a "normal" jag, because I had it converted to run on LPG several years ago.
The thing that gets me confused is that when I change to run on LPG it runs great, but misfires on petrol.
Knowing this, I think I can discard plugs and coils because if they were the culprits it would run even worse on LPG.
Can any of the experts here help with this (un)common problem

Thanks
 

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Its worth checking the wiring from your petrol injectors back to the gas ecu for any breaks damage etc possibly heat damage depending upon the route used for the loom.
 

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Can I ask those who use LPG if an average 23 MPG is what you get from the message centre? This is for town driving in a 3 Litre X Type.
 

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Discussion Starter · #4 ·
Thanks Big Bear for your suggestion. That is going to be my next step (checking all the cables ......). I know there is a common wire for the bank 1 injectors but I do not remember the color. Can it be yellow/green ????.
My installer also said that it could be the injector emulator, but he finds strange that only one bank fails.

I noticed that you had your cat converted too. what kit are you using (i´m using prins). You had to put a petrol return pipe, or have you used an emulator for the petrol pressure?

Santer: I think the message center does not give an accurate LPG consumption but rather a petrol one (he thinks).
23 MPG is VERY good for 3.0 LPG Jag. mine does 14.5 l/100Km

Thanks
 

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Thanks for the reply amcastro1
 
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