What normally causes this? i have had the timing checked, new dizzy, plugs,leads, rotor arm, had the fueling set but still bad, drives fine if driven off boost but when it kicks in it really holds back and misses, have been told maybe the cam is worn, sound right? any ideas please on what to try next, thanks

 

do you have uprated boost pipes,because its quite common for the botttom boost pipe (turbo to metering unit) to collapse under boost not allowing air to the turbo

 

yeah they are uprated mate

 

i had exactly the same problem with one.....EXACT!! go change the spark plugs. let me know how you get on.....i had few sets in it and was the same....put ngks in an spot on

 

got new ngks in there now

 

has is sorted it mate?

 

Have you set the plug gaps right.

 

i put the new plugs in before i posted here, plug gaps are right too

 

have you changed the coil, might be a rubbish spark to start with