what degree and how often, and on which cylinders, just 1 or all 4? Change your monitors on the AP to show ign correction for all 4 cylinders as well as knock count and charge temp.
Report back.

 

The most common is cylinder 3 but it’ll do it on all 4 most commonly it’s -1- -2 but I’ve gotten -5 in the past.

 

Actually scrath charge temp, check Octane Adjustment rating, I think the monitor is labeled OAR lean or learn? The value should be -1. if its not, you have bad gas, or are running low octane on a 93 octane tune.

 

sometimes I used to get a weird random -4 or -6 on one cylinder while just highway cruising right after leaving in the morning before the car was completely up to ttemp, I always just attributed it to hitting a bump in the road or something to do with warmup. I rarely got much negative correction under WOT , some is normal, it's the way the computer tunes itself during a pull for the most reliable power: with throttle, more air and more fuel during acceleration, the computer slowly adds more timing, this is the + correction we see, it keeps slowing adding, until/ or if a knock is detected, it makes a negative correction. Really safe tunes will always see +4.5 or what ever, because they are such a conservative tune the never see knock. An over tuned engine would see knock all the time or too often.

I guess the first thing you should do mechanically after checking OAR to be -1 would be to check your spark plugs.

 

Not much to go on here, but I would reach out to Stratified in regards to your neg. corrections if the above suggestions don't help. We don't have any mod list of what you're running. Did you try to flash back to Stage 0 tune and monitor corrections?

What type of plugs are you running? Did you check the gap?

 

What are the details of the specific tune that you have purchased and the extent of the modifications to your vehicle?

Worn of improperly gapped plug will result in an increased number of misfires not negative corrections.

Negative corrections is the result of increased detected knock or from a premapped strategy to prevent knock.

 

Low throttle ignituon corr. Is the ecoboost ecu usyally doing its job to prevent lspi, i never get negative ignition corr during ctuise or wide but i run 93-100 50/50 mix all thr time. Like my tune is tuned for that mix i dont run a plain 93 tune....i would say try some better fuel n i wouldnt n surpised if they go away for the most part. Also what rpm n gear does this tend to happen at?

 

Not much to go on here, but I would reach out to Stratified in regards to your neg. corrections if the above suggestions don't help. We don't have any mod list of what you're running. Did you try to flash back to Stage 0 tune and monitor corrections?

What type of plugs are you running? Did you check the gap?

stage 1 tune with a catless downpipe and a full catback with only a muffler, so basically stock. And yes I did flash it back to stock and it fixed the ign corr issues

 

@nwjn
Get rid of that factory Intercooler.

The negative corrections will occur anytime knock is detected past a safe threshold. It is also adjusted per OAR (octane adjust ratio) which is determined by fuel quality.

Do you have access to E85 where your at?

 

If using factory knock retard table, that's common and nothing to worry about. Stock will do -3.5/+3.5 before adjusting learned octane value (real octane learning, not what most tuners have)

If using modified spark retard table from OTS (most tuners use the OTS version) Then I would be worried with a -5. I would reach out and ask stratified what they think.

 

This is what i was trying to say in a very loose explaination earlier...this is much better...obviously.

 

How did you check corrections after flashing back to stock? How are you still monitoring the corrections? And all flashing back to stock did was dropped any advance your tune had on the car. So if you want to actually figure out the issue of what was causing it, im really leaning towards just needing some better fuel, and i wouldnt mind knowing what your plugs look like and their gap, corrections tend to get worse, the worse the plugs get with time and the wider the gap...im just noticing correlation after doing my plugs SO many times and noticing that any knock and corr i may start to get around 12k miles on plugs disappears with a freshly set of gapped plugs at .025....but if your good with just cruising stock, then thats all that matters, its ur car. Be happy.

 

Ok gotcha, so ur running cobbs stage 0, i gotcha, ok, i know they say its supposed to be similar mapping, torque strategies and all of that like ford, but stock to that stage 0, i think stock runs way better. At least when i tried the stage 0 back when i first got my car just as like a ****s and giggs thing to see how it worked, and it didnt seem anywhere near as smooth as faxtory operation...maybe that was just me. Hope everything works out for ya however ya wanna leave it. With or without the tune.