ok guys im needin some help, bud just got his first honda and i dont want him to hate hondas lol. clean 91 crx si with a dohc zc swap and jrsc (Jackson Racing Supercharger). its only on 6lbs but runs good, no tune but does have a fmu. having a hesitation when you hit the gas, worse at lower rpms or bogging up a driveway.

no cel codes, tried everything i can think of to fix it, triple checked timing and all the sensors. has a 88 prelude si t belt on it and a 89 integra ecu throwing no codes. plugs aint white so im leaning away from it running lean,

 

umm any kind of boost you will need tunning

 

I knew someone would say that... And its not true. On only 6lbs with the big injectors and a fmu you can run easily, its pretty much a street tune. But either way I know the boost ain't the problem because it wasent doin it when he got the car.

My stock a6 did it to but I have no clue why, it don't do it anymore. I do think its running rich and on the way home tonight the cel threw code 1 o2 sensor but idk if its bad or threw it because it ran so rich. After you get past the hesitation when u hit the throttle it lights up and goes.

 

Still can't figure it out

 

TPS adjusted correctly?

 

smh the tune is so that you could modify your basemaps so that you wont run rich or lean hence its called a tune not just because you slap on bigger injectors and a fmu will it make it work but your call im just saying a tune will make your friends car run great

 

Lol, please explain how that fmu controls ignition timing? Get the car properly tuned please.