cant figure this out.. maybe fuel, maybe vacuum leak. i duno

[Guest ON3GO]

well i dont know whats up with my blue Z.

ok heres what i think is going on.

 

while driving it not into boost the car will stumble and surge like mad.. but once boost comes on its fine, well not fine.. still feels slow and boost is down abit.

after i gun it the car goes FULL rich, atleast i think it does. you can smell it big time and car stumbles and etc.

car feels slow.. werid cuz boost might be down a pound or 2 but it feels way slower..

car is getting about 10mpg which sucks and is making me sick lol.

 

another thing is if i fool with the MBC it wont lower or raise boost!!! whats that about.

lines looked clean and no cracks so i dunno whats up.

 

its a 82 L28ET with 77 ecu and harness.

fmic, full 3inch exhaust, downpipe, bov, jsk fuel rail and thats about it.

 

it never did this before but now it does all the time.

 

mike

[wigenOut-S30]

I would try to put a spare AFM in line if you can.. Also clean all contacts under the engine as well as at the ecu. You might have a boost leak somewhere as well.