Nistune Forums

Problem found and all fixed. Thanx guys.

Thanx for the reply Matt. No, its on a Z31. But, I found the problem, it was my mistake. i used the air valve connector to the injector, and vise versa.

Hey guys, here is my problem. After connecting all my engine wiring back up from doing a HG replacement, I found that the #1 injector was stuck open. First I thought it was a bad injector, due to how old they are, but I moved the connector to #3 and the problem followed. I did absolutely nothing ECU...

i understand what u mean, but this is not a problem i had until recently and i have ran nistune for several years now. The ecu ground, which is what i think might be a problem, has not changed since i originally connected the system.

hey guys, whats up? first of all, i apologize if this has been addressed here previously, i briefly searched and did not see anything similar. My problem is that my AFR across all rpms was randomly shooting up to 16-17. other times i would start the car and it would be in the 12-13 range, in which f...

thanx guys, *almost* everything is great now. just got to work on light load/low rpm cells now. these are off by more than 1 point still.

i couldnt find where to set the temperature, what i did do was to change the k value from 215 to 155, which for 550cc injectors seems a little low to me. anyways, this brought the afr back to normal. what im afraid of is that this problem fixes itself and then i will be extremely lean until i change...

well, bit 3 turned off didnt do anything. still rich like a pig.

ok, its not just me then? i thought this was the weirdest shit. when i drove from california to texas, about 1800 miles, i would fill up the tank and for the first 1/4 i would often get more than 100 miles, and right after that i would get 30 for the next 1/4. and it just kept doing that until the t...

hey whats going on Matt, guys? here is my really weird problem, my car, 84t with an 88na ecu, decided to cycle between stoich and extremely rich afr. from ~14.5 to ~9s. now, the bizarre part is that this isnt from second to second, or minute to minute, this happens, from what i have noticed, dependi...

whats up guys, just as an estimate, what is a ballpark figure for k constant and latency with a cobra maf using 550cc injectors? my numbers came out to 592 (0250) k and 2340 (75) latency. i thought that the k value was way off but it is what automatically came up. any ideas? thanx a lot guys..

alex

thanx for the clarification.

hate to be a bother, but i am confused on this. i looked at the user manual, pg 32 which is the one that talks about the 87-89 ecu and i see no mention of the diode although it is there for the other ecu's.

guys, whats up? basically, my problem is that when i try to log a run selecting rpm, timing, afr, and afm voltage only the rpm and timing actually come up on the graph. the others i can read in the individual gauges, but not on the graph. also, all the graphs are saved with the date stamp, but when ...

Hey Matt how is it going? so for the 88 ecu, where does the 5.1 volt zener diode go? do i put this in place of one of the resistors?