I installed my new 62mm TB then all hell broke loose. everytime i drive my car the cel p2074 pops up and ive been searching and searching and there is no where that tells me how to fix it. when the light is off the car runs fine but when its on the car sputters and bogs out and doesnt move. i think its cause the bigger TB is getting the TPS all crazy and its not letting the fuel pump pump enough fuel or something like that. but please if anyone has any idea of how to fix this i would realy appreciate it and i know there are a lot of you out there who know your stuff so please i need your help.

 

and one more thing, the reason i think is the problem with the fuel (as stated above) is because as soon as the cel turns on, about a minute latter my aem wideband starts acting up like instead of reading 14.5-15.0 while im cruising it starts reading 10.5 -12.0 as if i were in WOT thanks again

 

maybe a wire or sensor got hosed when doing your swap, either that or a boost line came off (red one on upp? black on tb?)

 

2074 is a code that is thrown when your PCM see's overboost. Are you running a staged PCM with aftermarket WGA / Boost controller or both on the factory lines?

If no, get a staged PCM or bypass the factory lines.

 

i do have a MBC and i do have a WGA and no i have stage 0 but ithink i just need to do another boost leak teast and check for leaks one last time. and yes i did reroute all my vac lines and got rid of all the factory ones, but i think ist a leak on the new 62mm TB and i think i need to do the fades TIP mod (i think thats what its called) because my car is boosting to fast so ill fill you guys in after i do a quick check and thanks for all the help guys

 

Coming from a person that owned a ACR new. check it out. It spikes hard because there is a minimal bleed and the turbo is small. Most turbo cars build boost as the RPM increases. We are full boost in the mid-high 200RPM range, and bleed boost off. Its called "part throttle boost". It is a normal occurance when you bypass the Factory lines. The factory selenoids bleed the boost off at certian RPM's to stay uniform.

Your throwing the P2074 because your staying in boost for too long under low RPM condidtions. That is what you call part throttle boost. One thing you may need to do, (and I am not trying to sound insulting at all) is learn to drive the car again without boosting if un-needed. Part throttle boost is a pain in the ***, and leads to compressor surge and flutter.

On stage 0, which I ran, I threw it a bunch of times when not paying attention. You need to get a stage 1 PCM so it doesnt throw the code anymore and dump timing in. I am sure the car slows up alot once the Cel goes off.