Hey Richie give me a call tomorrow mine does the same thing. I had to get a cold start tune Ill explain gimme a call . Its a mixure of the cams and fuel upgrades and alt . where we live.

 

i'd question the tuner. Did you switch maps at all? timing is a bit on the high side for my taste. That could explain the awesome numbers. Got a dynosheet you can post up?

 

yeah i can scan the sheet tomarrow im not getting any knock or anything just very confused as to how so much was left untunned ? kinda disapointed actually

Alex i will for sure hit u up man i tried to get ahold of u the other day i think u were working though

 

I didn't look closely at any of the data about your open loop performance, but looking at your MAF readings at idle, the MAF frequency is WAY high which means your fuel trims are out of whack and probably what is causing your car to want to stall when the car is cold. The modified frequency is a little better, but not enough.. Also, I don't know your idle AFR, but if you use an OBD-II scanner, if your long term fuel trims are +/- 15% or more, you will have all sorts of idle speed and hunting issues.. You need to get those trims in check and your idle will improve dramatically. You also may have to manually raise your idle speed slightly using the BISS setting on the throttlebody.

 

c i need a little more indepth help if u dont mind jack im pretty new with it all and i am kinda getting a forign language from you hahhaa sorry if you could pm me or catch me on aim it would help so much and i would totally appreciate it! thanks a lot

 

well i mabout to go cold start the car and log it ill post it any help when i do would b nice

 

ok here it is u can c i start it and it dies and do it again and then on the third one i revved it a tiny bit ...

also i should be gettting a wideband here soon which will give my a/f but honestly if the car would stop doing this i would rather have it rich so any adjustment would b nice

 

also just did this one dont know if it will help?

 

wow that's some serious maf hz you got there. Fuel trims definately have to be off quite a bit. What injectors are you using and did you scale the injectors?

 

Hey man, just wondering how long they took to tune ur car? Also, Ive heard about the cold start tune and i think they may have skipped over that part. Since ur in CO, im sure the elevation and the colder weather may throw off your ECU. I would say call the place where u got it tuned and ask them about it. Good luck man!

 

the injectors are 880 cause im going to do a turbo upgrade in the future and they were scaled to like 700

is thier a book or something somewhere that would explain all the numbers and % and what it all means so i can tune more my self?

 

I think that Jack is right on the money. You need an OBDII scanner (code reader) to check your fuel trims. After you get your hands on one, you need to post the readings in order to get an idea where you are at. BTW the real cheap code readers do not read fuel trims you need to get a decent one or borrow one. Also those huge injectors are certainly contributing to this problem. They are very slow to respond and make the "hunting for idle" much worse.

 

i can get my hands on the obdII and scan it but where do i find the fuel trims on it? would it b the same as the a/f im sorry im confused

 

Not the same as A/F there should be a menu on the scanner that lets you view fuel trim. It depends on the scanner.

 

k guys went back down to where i got the tune and was going over it with the tunner and everything was seeming perfect lke b4 so i let the car sit for like 2 hours in the cold and then we tried and we ended up scaleing the injectors down again

and guess what its all better now weird i dont know lol o well and my ecu is controlling all the timing i have yet to have the timing done due to im planning on doing a turbo soon and will do that then...

Thanks for all the help guys