DFI Module Going into Bypass

[JCSuperina]

Hi all, I'm in the process of making a 2-step system but I can't stretch out the cut long enough due to the PCM going into bypass. I don't know if I can just trick the DFI into staying off bypass but let me know!

[antus]

this is a bit too much of an open ended question. what car? what ecm or pcm? what are you doing to try and get the 2 step function? what do you mean bypass? Normally bypass going high happens when the revs are above 400 rpm and is normal. I am takeing it that you want to keep the built in 10 degrees timing generated by the DFI? You could put a switch on the bypass line to disconnect it from the ecm/pcm and ground it to keep it in bypass, or you could connect a switch to the diag pin and ground that to put it in diag mode where it'll flash codes and also give you a locked 10 degrees timeing.

[JCSuperina]

Sorry my bad, it’s a NA VY V6 PCM. I’m cutting the EST line out when it reaches 2k at the moment I’ve got it set at 50ms because any higher and it will immediately give a CEL. I’m wanting it to stay on the PCMs timing rather than going into the DFIs. It’s going into limp mode because it’s detecting the spark is not running right, just need it to stop trying to go into the DFIs limp mode so that I can make the 2 step a bit more aggressive because at the moment it still creeps up much higher then what it should.

[antus]

Ahh I see. So your spark cut is to break the spark signal by cutting the EST line. And you need to avoid the fall back mode the PCM goes in to. I'm not sure how it detects that state. Does it set any codes? I trust you have verified bypass goes low from the PCM.

[immortality]

Aren't The1 and Chrome trying to do the same thing with their 2 step/rev limiter and having the same issue?

viewtopic.php?t=8567

[Chr0m3]

Aren't The1 and Chrome trying to do the same thing with their 2 step/rev limiter and having the same issue?

viewtopic.php?t=8567

I don't have that issue, the1 does our code is entirely different, I've also told old mate here what he can do, he needs to make the cut faster so it doesn't trigger the fallback.

[JCSuperina]

If I make the cut any faster it struggles even more to hold the rpm normally just sky rockets to redline.

[Chr0m3]

If I make the cut any faster it struggles even more to hold the rpm normally just sky rockets to redline.

Don't know what to tell you a genuine bee r can cut fast enough to hold and not cause EST to fallback.

[immortality]

Aren't The1 and Chrome trying to do the same thing with their 2 step/rev limiter and having the same issue?

viewtopic.php?t=8567

I don't have that issue, the1 does our code is entirely different, I've also told old mate here what he can do, he needs to make the cut faster so it doesn't trigger the fallback.

Fair enough, I just recall you were both working on a similar thing and having issues.

[Chr0m3]

Aren't The1 and Chrome trying to do the same thing with their 2 step/rev limiter and having the same issue?

viewtopic.php?t=8567

I don't have that issue, the1 does our code is entirely different, I've also told old mate here what he can do, he needs to make the cut faster so it doesn't trigger the fallback.

Fair enough, I just recall you were both working on a similar thing and having issues.

My issue is it doesn't work at low rpm, higher the RPM better it works, I don't get EST codes etc.