ive just sorted out my boost leak as the car was only running 0.3bar

the person who mhad done then rebuild before me had replaced one of the lower inlet gaskets with the wrong one

 

so ive sorted and put it all back and now there is a miss

i scaned it a l o2 sensor was reading 0.04 and the r one was reading 0.00 so not working will?can the be doing the miss

O2 sensor are not used at idle. So although you will get a reading, they will not cause a misfire.

 

Your problem is either Spark fuel or compression.

 

Start checking the easy / cheapest first. The PTU, make sure the connections on both sides are clean and have good contact. If it still misfiles, check you are getting a spark from each plug.

 

If you are, check the injectors are firing, with the ignition on but engine not running, rota the CAS and listen for the clicks.

 

If all is well here then you need to do a compression check on your cylinders. Low compression and you need to do a cylinder leakage test to tell you what's at fault.

 

This is the order in what you should check. My guess is that you will find the fault at the spark level, i.e. ptu or coil pack connector.

 

Let us know how you get on.

ok thats mate i will do

Check the injector connectors are seated correctly. To replace the lower intake gaskets you will have had the injector connectors off and they very rarely make a good contact when first replaced...

This is the order in what you should check. My guess is that you will find the fault at the spark level, i.e. ptu or coil pack connector.

 

Let us know how you get on.

 

I had a similar issue and it was a spark plug that was intermittentantly faulty. It's a fairly easy thing to try after checking the PTU connections.