went for a drive today and noticed what I think is a boost problem, I was poodleing along at 65 mph in 5th gear then nailed the throttle and just before it started to boost it died before I could hit 70 mph, until I released the throttle again.

It only seems happen in that rev band and in 5th

Any idea as to what this could be ? and what I need to check

chears

 

Sounds like overboost protection due to running too much boost.

Was the cut severe? Like someone turned off the ignition?

 

Yes thats exactly what it felt like, "totaly die's" is there anything I can check myself,

thanks

 

i thought i was special having this problem when i got my sapphire a few weeks back but after reading the tech sections on here and rsoc it seems my car is just common with it's illness's

 

I had that problem after adding stage 3 parts. It wouldn;t run smoothly over 18psi, anything higher it would cut out slightly then go again. After a lengthy check over everything it turned out to be a corroded dizzy cap, that wasn't producing a strong enough spark.

 

mine was over boosting (as stu directed me to at the time!) simple adjustment to the actuator later and all was fine