I just recently installed a new fmic and hallman mbc, i drove the car around the block (let it warm up alittle before) and i go to boost and than shift and all the sudden she revs up to 5,500rpms and sticks there. the only thing i do is shut her off. Start it back up and drive. the car drives fine normally and is idleing normally. and no i didnt install my hallman backwards. any ideas what is going wrong?

 

so did it randomly rev up to 5500 rpm and drop while driving? it Kind of sounds like your clutch is slipping.

 

Or there is some sensor out of whack?

 

At first I thought he was talking about 2 step, but you were already moving, I'm going to guess your clutch is slipping or your losing boost. Check your clamps on your FMIC

 

no the clutch is fine, my foot isnt even on the gas and when i shift (when in boost only) it revs to 5500 and stays there. Its out of gear in neutruel and still holds 5500rpm and doesn't do anything

I shift as soon as my foot hit the clutch pedal and its disengaged the car skyrockets up to 5500 so i leave it in neutruel without touching the clutch and it sits at 5500 and this only happens when i boost. the car will drive and shift normally but as soon as i hit 1psi the rpms take off

 

see if your throttle cable is getting stuck up somewhere or maybe your gas pedal is snagging up on the carpet lol, it happened to me before

 

do you have NLTS? maybe if you do its not working right?? IDK

 

naa its just a 5speed 8 and i checked around the throttle cable

 

could be throttle hang but even that your rpms will eventually come back down. How long does it stay at 5500

 

re- check the hoses to the MBC and the fittings. If all OK, then start taking off the mods you added, and see which "part" it is that made the revs stick. I bet it has to do with the MBC and the hoses, and the nipple getting plugged under the airbox. just a guess. Or boost knob is closed/open.

 

i have the mbc fully open, but i was running the car for a month or two with just a hose going from the turbo to the wastegate and it was running fine but boosting horrible lol. ill check that stock solenoid again and plug her up all i did was electric tape it, but its been like that for awhile i dunno if me just moving it around might have did something

 

I figured out my problem this morning!

I was reving the car up in my driveway building little boost, the car was idleing like **** but few rev ups and she sky rockets to 6+k this time and i see the throttle stuck i shut the car off cause i wanted it to stay stuck open to diagnose where it was getting stuck from everything was fine!!! so im playing with the throttle manually while the car is off and i notice its sticking im like wtf? so i take my IC pipe off and there is a Packing Peanut stuck to my throttle plate!!! i took it off and the car runs and boost beatiful again and i didnt have to de-mod ^_^ thanks for the help

 

wat

 

Packing Peanuts?? I hope it's not those Recall Peanuts

 

i bought a used fmic and he had UPS pack it and they got packing peanuts all inside the fmic, i thought i got them all out but apparently there was still 1 left