Thread: Part-throttle hesitation

Are you convinced that this is related to the tranny swap?

I'd start by checking base idle and also making certain that the EGR to BPT pipe is clear.

If you are ever over here on the West side of the state. Give me a holler. I'll help you out with the car. I'll PM you my number.

OK I can solve both of your bucking problems. It is your tunning. My turbo car used to do this underpart throttle. It would kind of feel like it was breaking up but not really just kind of hesitating a little. My friend jumped in with the laptop and wideband and we were able to fix the problem in about 10 min.

My car bucks at low throttle in first also.

Did you do this on a safc2 on low throttle points? Im guessing you were running rich? i think thats whats happening to me but im not sure and i dont know why it would do this to me now since it hasnt before

no I did not use a safc. I used an e-manage and I used the TPS reading with the maf voltage to determine what was going on. My friend actually did the magic. He went into the e-manage at the specific rpm where the readings were strange and he changed the values. If it is hesitating during acceleration it is most likely timing or something with your tune.

I had this issue years ago with my '94, after swapping out the stock lowport for a highport. I ended up going to a highport ECU, despite others having done the same swap with no problem.

Nic I don't know if you have access to one but if you have a spare ECU maybe try that out.

mine is only when crusing, wot or half throttle is fine, its like just crusing or lil throttle for me

Most partial throttle bucking is a bad O2 Sensor.

I was having some bad bucking problems with mine I disconectted the O2 sensoer and the car ran way better. Put in a new one and everything works perfect.

****. I just got an O2 sensor too. I guess ill try using the 4 wire O2 sensor and ground it somewhere on the block.