Nistune Forums

I can double check if CA18 should be correct. Z31 doesnt have a variable TPS input (only switch). Shouldn't report voltage. If it does for Z31 then I can make NIStune ignore it ok, cool. how can i make it ignore it? it does read a voltage although its off at times. at idle it says "TPS ON"...

i get around the same voltage...

although i beleve it is incorrect. Ive been suspecting the tps sensor since last week.

The 02 sensor goes crazy .2 to 1 volt until the car warms up then its fine...

im sure someone will chime in, but your k-value seems too high for 550 injectors...

im running 420cc's and im at 376 k value

i believe 286 is in the ball park.

thanks matt

These values seem off compared to all the others. I tried reloading new image files but still nothing...

anyone have correct values or a idea of what the graph should look like?

what injectors are you running?

its wierd. once the temp reads 50 it acts up on the dot every time then goes away at 70. so basically starts fine, runs like crap after a min with a loopy idle vac gauge reads -21 rythemically moving to -15 and back untill the coolent gauge reads 1/2 way. then a study -21 im getting some dyno time n...

Well the car starts fine, but then after about a min, the idle goes up and down almost stalling untill the car reaches operating tempature. If i fiddle with the idle timing and the cold start it changes it but i still cant get it quite right.

anyone seen this?

ok so if factory fuel flow at idle is 259cc @ 30psi and the benz injectors flow at 420cc @ 37psi. wouldent the rateing "psi" effect the changed k values when doing a injector swap? i figured the 420cc injectors would be at about 340cc @ 30psi anyone know what the k value and latency would ...

well im going to try and figure out how to hard wire the pump this weekend and update with results

I know on Z31's the ECU has a bit of control on the powerflow to the fuel pump. I too have this problem having the injection multiplier reduced from 365 to about 300. I have a walbro 255 fuel pump. I need to recheck my fuel pressure because i believe it too was a bit higher then normal. I have a new...

one other thing- if you change the offset to 0 do you have to go through and do the "change maf sensor" in the operations window?

also how does the new feedback controls work? when they are all checked it means no 02 feedback?

the fuel temp gauge on my 84 z31 ecu does the same thing. i believe its in the "to do" list for matt.

Hendrick -
420cc injectors on my z31 turbo, kconst is at 376 and latency at 79

idles well and drives well, but when i get on it, it misses/hesitates when you shift. runs was too rich up top. i need more time on the dyno to work with it.