i just got tuned on crome, and got some real good numbers, i have fic 950cc injectors on e85. it idles ok but when u drive it for a while and engine is warm, whenever i stop or let it cruise in nuetral often the engine likes to die out, and wont start after a couple of tries. i dont know what the hell is going on, i have no check engine lights, all the sensors are fine. before i had skunk2 lsv basemape and it ran fine but since it got tuned with the bigger injectors on e85 its been doing this. now if i decide to switch to ectune since i have heard so much good things about it would i need to retune. iam gon talk to the tuner and see if he can fix the problem.

 

Yes you will need a new tune. Crome bin files do not work with eCtune.

 

damn that sucksss

 

Even if you interpolated all the numbers and copied the maps over, the sensor conditions set in eCtune are different so almost everything will be out of tune.

 

i will probably use ectune when i get a gt42r and sleeve the block and shoot for 600 to 700. but i am fine with 512hp.... just wanted that antilag ....i figured the car was dieing out because the fpr was set at 80 psi , ... i adjusted it down to 60, do you guys think that would mess with the tune?.. how easy is the tune affected, lets say i switched spark plugs and switched to a different weight oil (was thinking oil for the diesel trucks because i heard it neutrilized the e85 blow by), but the same time i have .001 extra clearance on my rod bearings so i would need something thick, as of right now i am with 10w40 mineral oil.... iam still in the learning process... you will probably laught at me if u see all my post starting from my full engine build up..lol... u gotta learn somehow...

 

What size injectors are you currently running?

Dropping your fuel pressure from 80psi to 60psi will require a change to your tune for sure. That could drop your fuel flow rate from 15cc to 30cc/minute.

As for your spark plugs and oil. If you are simply replacing your plugs it shouldn't make a difference in your tune. Nether should your oil. However if you are changing the heat range and or gap of your plugs that can have an effect on your tune.

 

they are 950cc fuel injector clinic low imp, it was messing with my idle so i had to lower it to 60 may i can try like 75.

 

Running a set of 950cc injectors (tested @ 43psi)
@ 80psi = approx. 1295-1300cc
@ 75psi = approx. 1250cc
@ 60psi = approx. 1120cc
@ 50psi = approx. 1025cc
@ 43psi = 950cc

Even a 5psi adjustment would require a touch up tune in my opinion.

Is your car fully tuned already or are you just playing around trying to get ti to run? If your having trouble tuning it yourself I would suggest taking it to someone who can do it for you. Tuning a boosted car when you don't know what's going on can be costly.

 

i had it professionallly dyno tuned, and it was fine but after i drive it for a while and i stop at a light it would die out, thats why i turned the fpr down..

 

will there be a difference i do a pull at 60 psi vs 80 or would it just affact the idle

 

Yes it will affect the entire fuel range not just at idle. If you had it tuned professionally and it isn't running properly I would take it back to them to fix it. They shouldn't charge you to fix an issue that you are having with their tune.

 

i went back and they said it was mechanical but i highly doubt it because i ran the car with stock injectors on lsv basemap and it ran beautiful. now they are giving me this bs. they told me to clean the idl air control, and told me to adjust the throttle plate so it idles higher and to bring it in so they can adjust the injector cycle duty or something

 

OK, so clean the IACV and adjust the throttle position sensor, or maybe they are talking about the throttle stop screw when they are referring to adjusting the throttle plate. I'm not sure on that one. Ether way it's a 5-10 minute fix.

 

that's just a bandaid for someone who doesn't know how to tune idle. many people can tune WOT...thats the easy part. It's idle and everywhere else below WOT that's the hard part.

 

well i got my wide band kit aem uego, and the idle is way lean doesnt even register ---. when i turned the fpr down to 60 it sounds much better and it idle around 11.5, which my tuner said is ideal for e85. but when i run it at wot the afr is around 13.00 at 80 psi fpr. i think they ****ed my idle up....

 

So wait, it was idling lean and it ran better when you lowered your fuel pressure (i.e. gave it less fuel)?

 

YEA WHEN LOWERED THE FPR TO 60 IT RAN FINE AND AFR WAS AROUND 11.5. WHEN IT WAS AT 80 IT WAS SO LEAN MY GAUGE JUST READ ---