Tuning Fitted Prv Now have problem

[BLUNTY]

Hi There Fitted Prv car drives mint 1st and 2nd gear but struggles to pass 3000 rpm in 3rd with exhaust popping ! have i got boost set to high or is the car running lean

Please HELP:bang::bang::bang:

 

[pinin__prestatyn]

Well, what's the Boost gauge showing?

 

[BLUNTY]

Its Boosting 1.1 - 1.2 , now ive ajusted it down to 0.9 seams to have sorted it .
Could the Gauge be faulty!!

 

[pinin__prestatyn]

Weird, I have exactly the same thing. It's probably your coil packs or spark plugs. They are under greater pressure on boost, making the problem worse. Try getting a second hand coild and trying it on each cylinder, and if that doesn't work, replace the plugs.

 

[BLUNTY]

Would this not Hi light as a fault if you coil pack was faulty, as i have had it at a fault finders??

 

[pinin__prestatyn]

No, it won't show up as a fault on diagnostics or as a light on the dash. I fixed mine, turned out to be a faulty coil!