ok
heres the deal and i need some advice from someone who hopefully had/has similiar issues.

Currently i have been playing with A/E, and using the various delta MAp and delta TPS to try and slowly(one at a time) work out few naggin issues with my car, mostly a flat spot in the 3-3600rpm range....

Its most noticeable at say 1/2 to 3/4 throttle where u push the shifts out to the 3500rpm(give or take) range. My Blm's in the affected area are 128 or very close too it.

gets that kind of rpm hanging feeling that i most associate with a lean out problem ir not neuff initial enrichment..

I've moved the AE multiplier vs delta TPS and the AE delta pws multiplier vs delta map and am not having any luck resolving the issue currently...

Someone care to shed some insite as to what im doing wrong or possibly somthing i have overlooked?

Searched it all out and added 3 new posts to my files but havent managed anything significant to fix it yet :-(
thanks
Jeremy

 

If you run into a spot in tuning where changing the fuel doesn't do much or anything, try moving the timing around.

It sounds like you need to pull some timing out.

And if your just maybe out of AE fuel try adding to the AE vs Coolant table.

 

It can never be something easy can it? :-)

lol i dont win
reviewing the timing table/curve and seeing what i can do
thanks for the 2 cents as always
Later
Jeremy
PS if i figure it out without going insane i will post results and/or fixes here
I really need a driver so i can use the romulator and play with a fe wof these tables on the fly

 

Well after playing around with AE some more and getting nothing but frustration for my efforts, i got extremely technical on it :-)

I threw fuel at it :-) (literally j/k)

I added a slight amount of fuel in the VE table at the affected area(s) and went out to play............problem is gone around the 3500 point and just barely still present at the 28-3k range where it comes off the conveter.

Hopefully t'row nite or thurs i will have time to disable PE and recheck the afflicted areas for the proper BLM. Last time i was dialing the VE table i was fairly close(124-130) so i will redatalog to verify proper blm with PE off and see what i get...

Which leads me to believe , that at some point it #1 i leaned it out not knowing #2 evil gnome is responsible #3 it just wants to be a little on the rich side in that area on my car or#4 maybe just kind of a dodo area for AE?(not good enuff to answer that solo)

Thanks for the help
Jeremy

 

which code ??

 

Its on a 730 $8D mask
my 91 Formula

 

Its 730 app with a $8D code

On my 91 Formula

 

give me a day or 2 to poke around something will jog my memory

 

Sick of playing with one table/one chip at a time for this, t-nite either with or without a driver im taking the Romulator out and writing notes and attempting to work one table at a time for the AE to see where that gets me.

Which table would be the most likely beneficial to me? The hanging or kinda sputter(not quite more like dead spot) is around 3200-3500 most prevelant under 1/2 to 3/4 throttle . WOT i dont ever notice it and holding a gear and rolling into it is not noticeable either only when i lay inot a good amount but not quite WOT...

Also did some datalogging to and from work today and i will be trying the AE vs. coolant temp tables and heatsoak the engine a few times and see what i get there as well
thanks for input
LAter
Jeremy

 

Just thought I'd add, that I had the same problem, a stumble at first @ 2600 rpm, tried everything, turned out to be a vaccumm leak causing it.

 

Obviously do some experimenting.
On the 22/23/24 we'll get you up to speed on it.
Of course you might have to sleep in the car while we sort thru it.

LOL

 

ok this is a mouthful but try reducing the values in the

Accel enrich delta map PW decay factor vs coolant table.

this table is an AE clamp of sort and by reducing the values you will be prolonging the delta map and delta TPS AE enrichment facotrs. did you follow that ?so as long as your map stays delta which comming up on the converter it should this will keep the AE mode engaged for a longer period of time by reducing the multipliers. this should fix that lean miss or lean spot pretty easily wihtout using PE to cover for it.

 

Ahhhh think i see what u were referring to. Was thinking crazy until the "decay" part finally lept out at me. I hadnt considered it in that way, but it does appear to make sense now, guess that would be next up on the list. Seemed to be a funny area and had to play with the VE to change it so i was covering it on PE and hitting under medium acceleration. Did manage to get out a lil t-nite with diacom and the car after playing around with the AE delta multiplier vs coolant temp tables and it did seem to help as well. Need some more seat/scan time to know for sure but first look is good.

Next step will be removing fuel i added in a small section of the VE tables and then re-dialing in the A/E's to see if it will all work nicely together
LAter
JEremy

 

glad to help i knew if i thought about it for a few days something would spark in this old knogin.

 

Did you test that out Jeremy? I'm am nearly having the same problem after my head swap.

 

How big of idiot do i have to be?

I swear i look at this tuff all the time and the fact that u were staring at the problem the entire time not withstanding :-(

live and learn and act the fool i guess :-(

Anyways coming home last ntie on a lil over hr long drive in the gta and having some time to think i had what i would call and epipheny(spelling?) lol

Hmmm loaded up TC today and going thru various tables and low and behold in the PE vs RPM i have -3% @ 2k and 0$ at 2.4k and 2.8k rpm :-(

Sat there thinking to myself what an idiot i've been when i know i've looked at it 20 times beffore and just plain to dumb to put 2+ 2 together :-)

Anyhow, I changed the -% up by 4 and the 0%'s up to 3 and 3.5 respectively and took her for a fun spin..........didnt bother with diacom(u could actually feel it happen) and guess what? did a lil slow speed stomp and the whole car hung out sideways and just spun :-) Of course for validity sake i had to repeat this several times lol (seat of the pants is good for things u can actually feel lol)

So anyhow i was right and i was chasing ghosts and i always felt i was missing something , i just couldnt get the whole 2+2=4. Now that rudimentary math schools have surfaced it seems to have eliminated my dead spot in moderate to hard acceleration even when i jump the above mentioned rpm's and attempt to hold it their on hard acceleration :-)

thanks guys and the moral of the story here is dont overlook the obvious lol . I dont know how many times i have stared at the PE tables and for some reason it just never clicked

thanks
Jeremy
PS hehe i feel like a idiot

 

what you essential did was cover the lack of ae with additional pe. the reason they put so little in the factory tune was becuase ae original covered those areas just fine. but if it works let it ride.

 

Obviously, you need more tire.
Then more tuning.
Then MORE tire.
Then more tuning.
Or you can really cheat, and in some applications, just dial the boost up, LOL.

See, it just never ends.

 

Ahhh grumpy lol
speaking of boost lol slowly making plans for project 350 Formula twin turbo when i get a house :-) I wont have money for anythign else so figured i'd swap to a 749 and fab up some turbo headers and make use of the couple of TO3-TO4 turbo 3.8 stocker turbos i have laying around... figuring 500hp in a f-body with the right gearing can get u to 200mph, think 15-18 psi intercooled boost on a LTR setup can get u there?............I'm crazy and more than willing to try....

Sides that phwsssssssssssssssssssssh sound coming from my car should more than unnerve stang owners and ricers alike lol

As far as more tires goes ill be runnign firehawk rims with 275/40's-17's and i have a spare rear set of gta rims and drag radials coming lol

Funstick,
I am going to experiment with the AE decay tables and see what results i end up with i still have one little spot, just need some time to see if i can catch it on diacom. Then go from there.. I dont think i as much covered for the lack of AE with the PE , but more or less adjusted the PE to coincide with my torque conveter vs. the fact. converter and factory stall speed (only way that makes sense to me the way the PE vs prm is setup)...........factory stall is 2k range for tpi and they basically zero it out or subtract fuel at those ranges from 2-3k............i just graphed it out and smoothed the curve and did some test driving... Dont know if u understand what i meant but thats the only logical way i get out of seeing that table or i flat missed it again lol like what got me here in the first place lol

LAter and thanks
Jeremy

 

well the decay just puts a gradual tail off on the ae over a few injector cycles.increasing the amount of time teh decay takes just keeps the fuel on for a bit longer. id ave to pull out my folders and see exactly hwo the calculation falls out in terms of time but its pretty simple. try diddling with it and see hat happens. as a foot note criag moates dropped the decays values by half on and is now slowly bring it back the other way. but it did help to fix the bog after it came up on stall.