EFIDynoTuning Forum

HI,

I've attached my cruise datalog and tune.

Can someone have a look and give me some opinions on how I've done so far?

So far, I'm seeing it bounce between spark source 8 and 9 and can't figure out why its doing that. I've done lots of reaserch but can't seem to pin down the cause. The ISCDTY settles out around 24 and the DESMAF is 0 give or take

The other thing going on is I can't get the KAMFR to 1.00 during idle but is much better when driving.Currently its at .887 or something like that during idle. My wideband and lambse are bouncing around but are in the same territory at about .97 - 1.03. I have stock cams but degreed them for -10 overlap to help in the spool department. This doesnt go well in having a good idle I'm assuming.

I've just moved over to Tuner pro from SCT and love the tuning in real time! It's so mouch more convenient than the SCT for sure!

Anyways, I'm open to any and all opinions on what I can do better. By no means am I an expert tuner!

Shawn

8 is idle feedback min clip
9 is normal idle feedback

you corrupted the fn875 function

you need to disable iat2 the MCT_HP switch since you don't have a cobra with the iat2 You don't have a supercharger bypass nor a map sensor or intercooler pump either.

oss teeth count for 4r75w is 24.

you doubled engine size sarchg but yet didn't reduce the spark tables so you are severely over advanced. What saved your engine was that you didn't disabled iat2 so it was setting a fault and yanking 10 degrees out globally.

did you try reducing the flow at your idle maf counts by that .88 error ? You have idle corrections referencing a part throttle learned value in the adaptive table.

your idle is going to be highly unstable because you set the idle spark gain really high so minor inconsistencies are going to throw idle spark around significantly

on decel your fuel pressure is pegging out because your fuel pump voltage needs to be dialed in

changing prldsw to 2 uses pct_load, why did you do that?

You didn't copy any of the SP** parameters over from stock so all of your base values are more than doubled.

The mach1 has AC_RLY_IS_NC set to 0, you have it set to 1. That will force your ac clutch to be engaged when the ac is off.

You can't set knock sensors to 2 without enabling all the knock sensor stuff and setting sane values. The 03/04 cobras didn't come with knock sensors so it all needs to be populated.

You don't have your pats code in there??? How is it not setting a theft fault ?

With a single turbo you need to disable bank 2 hego.

This should make her significantly happier and give you a much better start.

Wow...thanks!

I had no idea I was so out of whack with that tune. Thanks for looking at it

The perload switch thing to me was confusing from the write up. I just didnt get it. After reading through it it seemed like perload switch 2 was the right one. Obviously not.

I played with the sarchg to try and improve tip in. But I'm guessing that wasnt the right thing to do. I didnt intentionally set it to double. I must have made an error obviously and didnt notice.

Yes I have tried reducing the MAF flow but it doesnt improve like it should.

i don't have AC so I was guessing on if 1 or 0 was on or off for the relay. Is there a standard for that?

I thought I copied over my pats. Does that still need to be done?

I played with the idle spark gain to try and calm the idle spark down...trying to stabliise idle.

Everyone says this tuning stuff is easy. It's far from it! If I cant get this myself I'll be reaching out to you to finish it off. I forgot to mention I also have water/meth injection too. I havent even introduced that yet. Maybe I don't need to. We'll see

Thanks again Michael!

manifold volume is for tip in, you can throw that around to get her where she's happiest

changing sarchg requires extensive changes through out the tune as it changes load

maf didn't make any difference to the kam because the kam was referencing elsewhere in the adaptive table

yeah the ac clutch relay normally opened or normally closed is dependent upon your wiring harness.

03/04 cobra, GT, V6, Mach1 - not set == 0
99 cobra - set ==1

if its configured incorrectly then the ac clutch will engage while the ac is off and eventually pop off the prv and spew all its refrigerant or it'll burn up the compressor from being forced on if there's no refrigerant at all.

if you didnt copy over your pats code and it still ran and fired up then that would mean your original ecu was replaced at some point and the pats code was blank == FF and someone reprogrammed pats to that, thus your pats code is FF which is what you have in that tune.

But yeah you should definitely read out your tune off your ecu to copy over your vid block, pats code and vin.

its easy you just need to get all the baseline stuff situated first.

meth/water is no biggie you just spray

Thanks Michael,

I sent payment yesterday to become a member. I don't have the time to mess with this anymore plus I don't know enough to know whats safe and what isn't. I'll get you to do it and know it'll be good.