cleaned the tps but nothing doing.revs low after i put a forge dumpvalve and rs500 cooler,any idea guys?

 

have you reset the base idle?

warm her up, unplugg the iscv, and adjust the base idle via the idle screw under the throttle body(brass screw) to around 900 rpm,

then reconnect the iscv and all should be well.

if your idle has dropped since fitting a new dv, you may find the old one had an air leak,inducing air into the plenum which would give you a higher idle speed. and for that reason it would be wise for a fuelling and boost check

 

cheeRS mate,very helpful