im having a weird problem that im really having difficulty solving, first my problem was a partial throttle acceleration studder, i tried setting the tps to .38 closed and 4.03wot, helped but still didnt solve it, so i was also having bad cold start studder and hesitation/flooding causing the hesitation. So i remembered i hadnt switched my jdm coolant sensor to my new usdm one when i swapped the motor, i didnt think that had much affect, but i switched it and set my tps voltage to .45 closed 4.16 wot, partial throttle hesitation gone. Nice and smooth,
Now my main problem, This only occurs in 1st gear. My setup is as follows.
Calum basic ECU 370's 4bar, Z32 maf in blow through setup. Now here is the thing, ever other gear is perfect, 2nd just burns the tires like crazy, 3rd gear spins the tires till 70-75, 4th and 5th are smooth, all gears accelerate smooth with no hesitation, no bogging, no misfire, no detonation. Im running 12psi of boost but the initial spike is around 19psi. T25 setup, i know i know poor t25, but ive been running this setup for a while, this just started to occur a couple weeks ago.
No matter what i do in 1st gear when i punch it, it starts to want to just burn the tires then it just cuts out, to the point where it almost feels as though the engine shut off then kicks back on bucking and misfiring through 1st but bam hit second and the tires go up in smoke it will pound off the rev limiter with no problems and go hard. Its only f'n first gear. What the Hell.......Im almost thinking maybe a maf problem. im gonna redo the ground for it and also run a grounding wire from the battery to the intake manifold where i have all the other grounds including my MAF ground. But its weird as hell. I cant lauch the car from a stop because once load is put on the motor and it starts to make boost it cuts out, bucks, hesitates to the point it feels like the motor shuts off, then it kicks back on and goes being the car is still in gear. Any ideas. Weird problems popping up lately, Oh and ive been running the Calum Ecu for a while with no problems, this just started a couple weeks ago out of the blue. I dont have any boost leaks so dont ask, im smarter than that, all couplers are good. Unless my MAF has just all of a sudden busted a huge boost leak somewhere going up through the sensor. but i doubt it because i would think it would affect all the gears not just one.
I know it must be fustrating for you to because you just got your car tuned like crazy it was running like a champ then you started having all these bogging and hesitation issues one right after the other. Cant figure this out.