Major grief.

[escort greg]

i dont know if any one has any ideas but i fitted a cossy lump back into my sierra today and it will not run properly unless its on full boost if you try to drive normally it pops and bangs and misfires but as soon as you open the the throttle up it runs fine very bizzare changed almost everything to day but no luck pray:

[escort greg]

fear not ive sorted it just a loose map sensor vacuum hose sorted.