So I've been datalogging and tuning with a wideband on and off for almost two months, mostly dialing in the MAF transfer function which is pretty damn good now but I'm now working on other stuff and I just having zero desirable results.
Coasting fuel shutoff(CFSO) plain doesn't work, I've tried everything, even contacted SCT to expand the section in my initially limited pro racer database and can confidently say there's no magic value missing, so it's got to be something else preventing it. Even copy pasted over other people's verified working values(such as Brandon's) to see if I could get it, but no. No CFSO flag in the datalogs, no lean peg on the wideband(actually it goes a little rich to ~13:1) and injectors still pulsing. Unfortunately I cannot say for sure if this worked with the automatic or not before the swap, I *thought it did* but I can't go off of 9 year old memories.
Other issue, semi-related, When I let off the throttle to decelerate or if I'm in between gears from about 2500 rpm or above the exhaust crackles and pops in between like a god damn BMW, I don't like it. It's obviously dumping fuel into the exhaust when the throttle closes where it ignites, what I can't quite figure out is what I can do to remedy it. CFSO shutting off the injectors would help but I I know that's not the root of it. I don't understand the transient fuel section at all, there's no descriptions, very little help on the pro racer forum but I suspect this is the section I should be lookin at?
Other thing also related is there's not much engine braking, not for my liking anyway. It's not a matter of rev hang or flare when I push in the clutch but revs are really pretty slow coming down. I even have a IAC restrictor I threw in to help this some and it's still not quite right, and I'd like to actually learn this stuff the right way. I copy/pasted the idle/dashpot values for a 98 GT manual into these areas I've messed with dashpot a little from these, adding up to 20% dashpot decay and subtracting as much from dashpot clip 1 as per the descriptions but the difference has been negligible if it did anything at all. Dashpot preposition truly does absolutely nothing at all, the stock table in my database is all zero'd out and the Mustang values I used are .270 to 2.000 air #m and from 344 to 16383.7 rpm... loaded two tunes today, with that and one the stock zero'd values, and no difference whatsoever.
Anyone got any ideas? Is there something I'm overlooking? These are a few things I'm currently thinking about, feel fee to say if I'm warm or cold.
-Under MAF scalers there's a descriptionless scaler called "MAF dynamics filter for decel" that has me curious
-Manifold volume I have set to 10 which supposedly is the Mach 1 intake manifold volume according to mitch B (though I have file that says it's 14 but that sounds wrong). This has an effect on transients but it seems fairly happy based on my wideband data.
-the scalers in transient fueling that mention decel or dsfo(decel shut fuel off??? DFSO is used interchangably with CFSO, or mayby its just a type o)
-I am fairly certain there is no clutch input to the EEC like there is on SCs and other EEC IV Fords, and logically I'm not sure why that would effect these things anyway but that's about all I can come up with from that wouldn't be tune related
Coasting fuel shutoff(CFSO) plain doesn't work, I've tried everything, even contacted SCT to expand the section in my initially limited pro racer database and can confidently say there's no magic value missing, so it's got to be something else preventing it. Even copy pasted over other people's verified working values(such as Brandon's) to see if I could get it, but no. No CFSO flag in the datalogs, no lean peg on the wideband(actually it goes a little rich to ~13:1) and injectors still pulsing. Unfortunately I cannot say for sure if this worked with the automatic or not before the swap, I *thought it did* but I can't go off of 9 year old memories.
Other issue, semi-related, When I let off the throttle to decelerate or if I'm in between gears from about 2500 rpm or above the exhaust crackles and pops in between like a god damn BMW, I don't like it. It's obviously dumping fuel into the exhaust when the throttle closes where it ignites, what I can't quite figure out is what I can do to remedy it. CFSO shutting off the injectors would help but I I know that's not the root of it. I don't understand the transient fuel section at all, there's no descriptions, very little help on the pro racer forum but I suspect this is the section I should be lookin at?
Other thing also related is there's not much engine braking, not for my liking anyway. It's not a matter of rev hang or flare when I push in the clutch but revs are really pretty slow coming down. I even have a IAC restrictor I threw in to help this some and it's still not quite right, and I'd like to actually learn this stuff the right way. I copy/pasted the idle/dashpot values for a 98 GT manual into these areas I've messed with dashpot a little from these, adding up to 20% dashpot decay and subtracting as much from dashpot clip 1 as per the descriptions but the difference has been negligible if it did anything at all. Dashpot preposition truly does absolutely nothing at all, the stock table in my database is all zero'd out and the Mustang values I used are .270 to 2.000 air #m and from 344 to 16383.7 rpm... loaded two tunes today, with that and one the stock zero'd values, and no difference whatsoever.
Anyone got any ideas? Is there something I'm overlooking? These are a few things I'm currently thinking about, feel fee to say if I'm warm or cold.
-Under MAF scalers there's a descriptionless scaler called "MAF dynamics filter for decel" that has me curious
-Manifold volume I have set to 10 which supposedly is the Mach 1 intake manifold volume according to mitch B (though I have file that says it's 14 but that sounds wrong). This has an effect on transients but it seems fairly happy based on my wideband data.
-the scalers in transient fueling that mention decel or dsfo(decel shut fuel off??? DFSO is used interchangably with CFSO, or mayby its just a type o)
-I am fairly certain there is no clutch input to the EEC like there is on SCs and other EEC IV Fords, and logically I'm not sure why that would effect these things anyway but that's about all I can come up with from that wouldn't be tune related
