ok so here is the deal. it seems to only happen at very low map levels, ~30 kpa or so. on decel, i can drop my VE table very low (teens) and it is rich. i can have it in the 40's and its the same richness. it seems that the injectors are only going to about 1.8 ms in those areas and not leaning it out enough. i verified with the WB that it is indeed rich, about 11.5:1.

from what i could tell, trying lower and higher timing, the fuel seems to be the main culprit. once i am out of this range where it goes rich, im fine and the car acts normal. i would really like to fix it but dont know what to do. ive tried to lower the injector pulse width settings and that didnt seem to help. they are 42# ford btw. i have scans to show as well. i will try to post up some pics of the histograms and ve. any advice would be great. i would love to fix this once and for all.

 

anyone?

 

would this at all be related to your DFCO or COT? I read something about someone that was having a similar issue with his truck that had a ls1 in it. Good luck figuring it out!
Nino

 

I'm thinking your injectors might be too large. I'm running Accel 36# and they are plenty big enough for my mods.

 

i have to disagree. So many people run 42# injectors with no issues with smaller cams than we have. Its not that he has too much injector.
Nino

 

exactly, that is why i wonder. with dfco diabled or enabled it does this, cot is also off.

 

your still in sd right?

 

yeah i am

 

did it happen after you made changes to the tune or just out of the blue? if you did reflash, and im only a beginner so bare with me Id flash with a tune before the issues started happening and use the compare in 2.0 to see if you accidentilly made a change you should'nt have elsewhere. Good Luck! I may be bugging you on aim once i get back this weekend gonna start tuning my baby if she runs after i put her back together. Sucks they blocked aim here on the ship
Nino

 

thats cool man just let me know when you need a hand.

and this has always happened. its just strange, the pulse width is only going to 1.8 and i thought it would go a lot lower than that. the min pulse width is set to 1.277 so even with the adder its only about 1.3 ms. but when i pull fuel the injector pulse width stays the same and it still reads rich. unless for some reason. i wish i had a set of smaller injectors to try it out on and see if it fixes it. i know a lot of guys that run 42#ers but never see anyone post with any issue like this. any response i got in the past was to just let it go since im not in those cells driving, well i want **** perfect lol

 

if all fairs well with mine, i could send u my 26#rs. wont be till the following week or so though. you could also PM bombguy99z28 (ben) see if he has an extra set laying around. i know he just went fromt he 26 to 28's.

 

actually my friend has some laying around, if i get some free time i may try to swap them out and see what happens

 

or that

 

i still wish i could figure out a way to make this work. i would like to see some comments from other guys running ford 42's with a 230ish cam for compairison

 

umm...this weekend ill be running a very very similar setup cam, injectors, only im using 243 castings and you've got the afr's.

 

ok cool, let me know if you see the same things.

 

will do. im still not sure if i should use my old tune and go off of that or if i should start from scratch. should i call my old tuner up and ask him to email me my stock bin? he should have it right?

 

he may, if not you can work off the old one. i can send you a stock bin you can reset some stuff. i would send my current bin but i would like to see if maybe i have an issue with my bin which is why i see these problems

 

i think i have my bin's here at work. ill load 2.0 on my computer and compare them or send you mine if you like. wont be till later this afternoon though. it was a dyno tune by a shop, so i doubt all the tables were touched. Im almost certain OLFA, DFCO, and majority of the ve was untouched.

 

yeah i woudlnt think much was done