what would cause my car to overboost.if i give it half throttle boost guage will stay at 1.0 bar all the way to 7k+ but if i floor it then it rises to 1.5,garage cant find anything wrong when it was plugged into their computer,cars just been rebuilt and i dont want it going pop.cars basically standard,vf28 standard vta,backbox,downpipe etc anything i can check cos im at a loss here

 

What did it boost to before ?
I managed to get the boost restrictor pill in the wrong place on re-fitting mine.... for the third time !

See thread - boost restrictor pill (halfway down page 1 !

HTH

DunxC

P.S. Mine goes to 1.55 bar from a rolling start, but never reaches that from a standing start.

 

dont know just had a boost guage installed to keep an eye on things.Surely 1.5 bar is way too much boost for a standard car?why doesnt it hit fuel cut or is there no cut on later classics?

 

Try to borrow another gauge, check it is accurate !

Otherwise, I'm no expert on classics, but check out the boost restrictor location in the plumbing...

Sorry,

DunxC