Wonder if anyone can help me out ?

I have a V40 2.0 Turbo

The car has developed an intermittant missfire.

I have had the OBD diags on the car and it comes up with no faults (generic OBD diags).

The car will idle fine and most of the time rev freely enough, but as soon as you drive the car, it misses like hell (unable to drive car it's that bad).

Naturally I thought it would be the HT side of things so I got new coils, plugs and leads, this has not fixed the problem.

One thing I did notice while out with the diags is that even with throttle fully open the diags was only registering 79.9%.
Even when you open the throttle body by hand to 100% the diags only read 78-79%, this may be our diags (as it's VAG-COM diags with a generic reader on).

It's beginning to do my head in now, I shall give the MAF sensor a clean and shall put a new fuel filter on it tomorrow.

Just wondered if any of you lot may have any ideas what this may be ?

Cheers

Andy

 

Maybe a bad TPS

 

Replacing the coil/ht leads and conseqeuently rotten sparks seemed to have cleared up my misfiring problem. the misfires were worst on the freeway entrance ramp when accelerating hard. check engine occasionally coming on.
my dad had similar issues on his 98 v70 and after much investigation found that one of the ht leads was ground on to the engine block (or chassis) can't remember precisley. i know it's a different car but maybe worth a thought?
t.