I know this is the wrong area for my truck ( 2g 1991 4runner) but I have 3.4 swapped it and recently added a gen 1 TRD supercharger (stock pulley) I’m having an issue with a lean condition. A couple times I did a WOT pull and got the optimal 12.4-12.6 afr but that is random because most times i try the computer seems like it does not want to give it more fuel and itll stay at like a 14.5. Which is bad lol. No codes. Just seems like the ecu doesnt want to give it fuel sometimes. And yes i swapped out the 32yr old stock pump with a walbro 190 because the stock 2g fuel pump is only like 70lph or something. Could it be vacuum to my fuel pressure reg is wrong? Any help is appreciated.

 

I thought the solution was either 7th injector, Supra injectors, and or SAFC, I believe all who put on a SC experience a lean condition during WOT under the right conditions.

 

Think I may have found it. Under WOT the throttle body is open 100% but the tps is reading 72%. Could that be the culprit?

 

FIXED!!! Intake leaked at the throttle body made a new one and used new couplers and she boosts just fine now!