alrighty then!! back at it with this challenger, fellow tuners shine some light!

[Hellscat2018]

Ok awhile back a customer brought me this challenger i thought some major engine issues, has a comp stage 2 cam, and hellcat blower swap, he had all kinds of issues got them worked out mechanically he had all his plugs not sealed tight, a few vac leaks and a bad fuel pump, this one is throwing me for a loop tuning wise, i typically dont have many issues, so bank 1 and bank 2 tuning its showing it rich, long term are off, short term are good, start car 14.5 then slowly drops lean on wideband, Verified with 2 widebands, car runs good for the most part, what am i missing, here is the tune and latest datalog, wot its a perfect 11.2 and does what its supposed too

[LilSick]

i looked at the log for 2 secs - saw 10,000 misfires and almost as many missing channels

looked at 2 tabs in the tune - pw vs fm and what is supposed to be its inverse

whatcha got goin on there???

[edcmat-l1]

Looks to me like the injector data isn't correct. It bottoms out at 1 ms pulse width and it still wants to pull 20%. You also have disabled the ability to use spark to pull the idle down to idle speed by what you did with the minimum spark table.

If those are Hellcat injectors they do not match what I have for 2016 Challenger Hellcat data.

[LilSick]

If those as Hellcat injectors they do not match what I have for 2016 Challenger Hellcat data.

i already had stated that the inverse of the fm to pw is not the inverse...

iow that data wont work no matter what injector is in the thing

[Hellscat2018]

i already had stated that the inverse of the fm to pw is not the inverse...

iow that data wont work no matter what injector is in the thing

ill take a look at the injector data i might have done something incorrect

[edcmat-l1]

i already had stated that the inverse of the fm to pw is not the inverse...

iow that data wont work no matter what injector is in the thing

There's more to injector data than IFR. And it's typically NOT flow rate that causes an injector to "bottom out".

[Hellscat2018]

There's more to injector data than IFR. And it's typically NOT flow rate that causes an injector to "bottom out".

so my injector data was totally off, thanks for the info i dont know how i missed that, i will copy over the correct data and report back

[Hellscat2018]

There's more to injector data than IFR. And it's typically NOT flow rate that causes an injector to "bottom out".

still having issues, with this thing, i have a feeling something wrong with ecu, as with the correct hellcat data bank 1 and 2 are both way off, not sure whats going on at all

[edcmat-l1]

so my injector data was totally off, thanks for the info i dont know how i missed that, i will copy over the correct data and report back

Yeah I'm sure you know correct injector data is vitally important. And the bigger you go in injector size the more difficult they are to control at idle. Whenever you run into a "no matter what I do" fueling scenario like this it's always injector data. As you said WOT is fine, it's the low rpm stuff that you can't dial in when the data is off for big injectors.

You'll need to completely retune it after changing the injector data.

I'd put the minimum spark table back to stock and actually tune the idle.

[edcmat-l1]

still having issues, with this thing, i have a feeling something wrong with ecu, as with the correct hellcat data bank 1 and 2 are both way off, not sure whats going on at all

There's nothing wrong with the ECU. That's a typical cop out. Everyone and anyone who doesn't know wtf they're doing thinks "It's gotta be a bad ECU".

[edcmat-l1]

There's no way you changed injector data and completely retuned it in the time between your posts (2 hours).

[Hellscat2018]

well i have seen diablo, then hp tuners issues where the stock ecu blows out the coil drivers, that could be why that bank is showing big missfire counts, , i would be glad to hear if you got anything i am missing

[edcmat-l1]

Post a current tune file and data log.

[Hellscat2018]

well i have seen diablo, then hp tuners issues where the stock ecu blows out the coil drivers, that could be why that bank is showing big missfire counts, , i would be glad to hear if you got anything i am missing, i have done a bunch of these setups already and are pretty simple to dial in . the min spark table is set to those numbers to help with the cam idle, i mean i cant imagine trying to start tuning anything when both banks are so far off, im looking for problems at this point

[Hellscat2018]

i will get another datalog shortly and post that and tune

[edcmat-l1]

well i have seen diablo, then hp tuners issues where the stock ecu blows out the coil drivers, that could be why that bank is showing big missfire counts, , i would be glad to hear if you got anything i am missing, i have done a bunch of these setups already and are pretty simple to dial in . the min spark table is set to those numbers to help with the cam idle, i mean i cant imagine trying to start tuning anything when both banks are so far off, im looking for problems at this point

The misfire counts are from the cam setting off the misfire detection. Are you sure you know what you're doing here? Doesn't really look like it.

[MI_Tuning]

100% its tuning with all the issues. hope customer didn't pay to much money for this lol. i would hire a professional & all your issues will go away jay.

[Hellscat2018]

The misfire counts are from the cam setting off the misfire detection. Are you sure you know what you're doing here? Doesn't really look like it.

lol you talk a big game homie, and the misfire counts are higher on the same bank as the fuel issue. btw i found the issue, the fuel rail had a partial blockage on the cross over, i also saw that the injector pw was off on same bank. not sure why you are even on here if you are going to be a dick and fight with everyone lol, and again instead of just actually looking into things you wanted to throw slang , keyboard warrior hard at work, im not a dummy i was just looking for some advice, you can pack your shit up and head out of my post now playa as i am not impressed what so ever

[Hellscat2018]

hahha your wrong it was a mechanical issue , but thanks

[edcmat-l1]

lol you talk a big game homie, and the misfire counts are higher on the same bank as the fuel issue. btw i found the issue, the fuel rail had a partial blockage on the cross over, i also saw that the injector pw was off on same bank. not sure why you are even on here if you are going to be a dick and fight with everyone lol, and again instead of just actually looking into things you wanted to throw slang , keyboard warrior hard at work, im not a dummy i was just looking for some advice, you can pack your shit up and head out of my post now playa as i am not impressed what so ever

That's laughable. I'm not talking ANY game. You asked for advice about your tune file and I'm telling you what's wrong with it. And I'm right about all of it. Sorry you have trouble hearing it.

hahha your wrong it was a mechanical issue , but thanks

Of course it is. So go ahead and post a new data log with your current tune file that shows the misfire detection is fixed without disabling the misfire detection.

One thing many years of experience brings is the ability to know bullshit when you hear it. You started a thread looking for help with problems that are easily identifiable to anyone who actually has a clue. Your injectors are bottomed out because the injector data isn't right and the misfire counter is going crazy because it has a stage 2 cam and you have to disable the misfire detection or it'll do exactly what it's doing in that log.

You can be aggressive as you want with your reaction to me telling you that you don't know what you're doing but it doesn't make me wrong. Someone else recognized it as well and told you to hire a pro tuner. Maybe you should verbally attack him as well.


misfire detection.jpg