I had the tuning man round the other day, the emisions where ok on tick over, then when reved they were sky high, then came back down at tick over.
If the AFM was unplugged it made no difference, I have 2 AFM's so tried them both and the same with the other.
The engine is a C20 XE, obviously Had a cat, THe AFM is a none cat i think, thats why it has a mixture screw, the loom has a connector to the ECU for a lambda sensor but i cant find the the wire or the plug that would go to the exhaust.
The probs i am having is when i put the foot down there is nothing then all of a suddden picks up, the throttle is uncontrolable!
The numbers on the AFM ECU and ECU plug are below, can anyone shed some light please?
ECU 0261 200 185
GM90 299 569
ECU Plug 1928 401 304
AFM 0280 212 015
Also i hve a vacuum pipe and i dont know where it goes, It starts at the right hand sid of the injector rail From a little box, There is one pipe that goes to the front of the throttle body there is a plug connected to it, then another long pipe that i have no place For!
Please help Please.