Hi everybody !!

First, i'm sorry for my very bad english, i'm french...

I'm stuck with an S-Type 2.5L V6 of 2003 :

After an engine change (used but very good aspect), i've a little (big) problem...

- When I accelerate, all is well until 3000rpm, but after 3000 rpm, i've misfire on the cylinder 2, 4 and 6 with the DTC P0300, P0302, P0304, P0306 and necessarily P1314.

The engine switches to restricted performance and after a few seconds in neutral, any errors, no misfire...

I've changed the ignition coil, spark plug, and no result...

With the IDS SDD, I can not seem to communicate with the ECM... i've error [Err 0xC]

Anybody have an idea ? i'm very... blocked...

Thanks to all !!!

 

Those DTCs are from the PCM (which Jaguar call ECM) so something must be communicating!!

Might be a bad cat. conv. -- try an IR gun to check temperature drop across the cat(s) and/or remove O2 sensor(s) and look with a borescope.

 

I have this code with simple odb reader... With the wds, no communication with pcm... :'-(

 

Odd. Not the PCM (ECM) to blame, then.

 

We don't know much about the 2.5L because it was never sold in the US.
Have you looked at the UK forum?
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It's essentially a (USA 2003-on) 3.0, with a tweak to 2.5.