Nistune Forums

bugger... well i tried another ecu. same deal. tried starting again with the map. same deal. had it running almost ok while limping to a petrol station... then i put fuel in it. runs like shit again. gonna have to start looking at the fuel system again. i'll check the pressure isn't up shit creek fo...

more hair pulling... I got a set of VERY nice denso 550cc injectors. They look like a work of art in comparison. didn't change a thing. still runs like shit! more annoyingly, I tuned an almost identical car today. same 880cc injectors, pump fuel, rb25, rb20 ecu, z32 afm. it worked fine. im going to ...

this also exites me a LOT!

i'd almost give my left nut to be able to run nistune with a map sensor!!!!

i've always been under the impression the rb20 ecu's were in batch mode. i've seen some ecu's fry an injector driver and 3 injectors die at once.

i've also never noticed ANY ill effect from running an rb25 on an RB20 or Z32 ecu without any wiring change.

something i've noticed a LOT of people miss when wiring rb25's into other cars is supplying power to the o2 sensor power wire. Its in the same plug as all the other important stuff. blue wire from memory. Thing is, it also powers the vct solonoid. If you've done a conversion and missed this wire, VC...

Yeah Pete they are modified stock jecs bodies. Not my choice but they fit peoples budget which is the problem. Matt, I tried playing with the ttpmin and max as usually i can iron out all kinds of issues with ttp min. Everything I did made it waaaaaay worse. The flow data supplied with the injectors ...

taking say a stock rb20 with stock afm and injectors, i could probably smash in some numbers and be fairly confident it would run nicely... BUT... as soon as you change the afm or injectors or both, it throws out the load scaling and k value so much that you HAVE to use a dyno, or at least some educ...

I tested another new afm today. it made no difference. so that at least rules that out. im starting to think the injectors might simply be too big and/or poor quality. really small changes in pw make huges differences to the fuelling. Pete, no the tps idle flag is behaving perfectly fine. Here's a d...

blow through bosch z32 afm (brand new) Do You have some custom tube for Z32 AFM as OEM plastic under boost can't hold very long and boost leak then become problem? its runs perfectly fine under boost. its cruise (vacuum) thats the issue. so i doubt thats an issue. With the RB20 ECUs since they are ...

Im pulling my hair out a little with this one... RB25 GT3076r sidefeed 880cc injectors in stock rail at stock pressure. overkill i know. rb20 ecu walbro pump 98ron ulp blow through bosch z32 afm (brand new) camtech drop in's I've tuned similar setups with 840cc deka's with no issue, rb20 with 780cc ...

thanks for the reply's matt. sorry i didn't read it again till now. Turns out the car had a dead fuel pump. its was just leaning out and it was a coincidence that it happened around a tp of 64. no that car has no speed sensor wire hooked up. 60% of the cars i've tuned haven't. its never given me any...

I currently have 2 cars in my workshop today that Im having similar issues with. One is a stock rb25 and the other is a stock rb20. They have issues with hesitation. I believe the issue to be knock sensor related but im not 100% convinced. The latest version of nistune has a new variable called &quo...

i had a customer who bought one of the rip off z32 afms a while back. it had a red sticker instead of the normal orange one. he got me to try and tune it... in order to get the fuelling even half close the fuel map looked like a mountain scape and was almost completely inverted compared to a normal ...

I thought that might be the case.

I know im speaking a dieing language when I say this but...

Is there a way to burn an image file to an eprom that contains the TPS trigger voltage information? Would creating a .bin with the HCR32_RB20_256_E_for_RB25 address file then burning it to a chip work?