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[TheBoy]

Stop randomly changing parts. It needs live data - initially LTFT for both banks, and MAF reading at idle.

[X30XE]

I haven't read the entire thread... Just your first post.  You don't say whether you owned it previously or whether you've ever had it running right previously?

Just wondering if you aquired it with the problem? And thus it could be damaged engine internals (possibly due to snapped cambelt) that someone has unscrupulously tried to conceal? 

(and yes; I have experienced this exact scenario recently myself)   

[Broomies Mate]

I haven't read the entire thread... Just your first post.  You don't say whether you owned it previously or whether you've ever had it running right previously?

Just wondering if you aquired it with the problem? And thus it could be damaged engine internals (possibly due to snapped cambelt) that someone has unscrupulously tried to conceal? 

(and yes; I have experienced this exact scenario recently myself)   

Have a go at reading the thread, then.  It isn't a 400 page epic. 

[05omegav6]

Last thing to replace is the loom, but no recent fault code updates...

Fresh loom was the only thing that cured mine having exhausted all the other possibilities. Only three things cause a misfire code... Contaminated plugs, contaminated coil packs, bollaxed loom.

Simples.

[JamesV6CDX]

Last thing to replace is the loom, but no recent fault code updates...

Fresh loom was the only thing that cured mine having exhausted all the other possibilities. Only three things cause a misfire code... Contaminated plugs, contaminated coil packs, bollaxed loom.

Simples.

Or low / no compression - admittedly more rare and as a result of a belt slip causing valve trouble

[JamesV6CDX]

Id still like to get my hands on this one for a look

[Ulap31]

To every one car running sweet when I bought it. Hit a nasty speed bump small clonk from underneath and problems since.
To James v6cdx tried messaging you but maybe I'm not doing it right, can we swap details etc as would like someone other than vx dealers to look at it.

[Ulap31]

Have had a thought. On bank 1 I've noticed the exhaust is blowing, up near the engine. Checked down pipe which is good and had a new gasket to manifold.
Could the speed hump I hit have cracked the manifold as the exhausts & the car are low and if so is the ecu adjusting the fuelling etc to bank 2 to compensate for the cracked manifold.

[terry paget]

Is the suspension lowered? How long had you owned he car before you hit the speed bump? Is there any sign of damage below the car from the impact with the speed bump?

[Kevin Wood]

An air leak into the manifold could well upset the lambda sensor reading and cause that bank's fuelling to be out. A look at the live data (fuel trims for each bank for a start) would show if this is the case.