any of you guys had problems with aftermarket blow off valves messing with your idle?

stock ecu, wiring, and air flow meter....

my friends car has run like ***** lately.. rich and doesnt idle.... he has a greddy bov...


any suggestions?...

 

The stock ones usually are partially opened at idle where as the better after market ones are closed. But this has no affect on idle as the throttle body and ISC system along wth the ECU controls idle functions.


I suggest you check the following in this order:
(1) make sure that the hose to the map sensor has not come off. I it comes off the engine runs very rich and shitty!

(2) ignition system for bad plugs, wires, or coils
(3) fuel system for too much fuel pressure