Help with map on new car.
im running the tephra v7 and it works good. the only issue i am running into now is i hit a "brick" wall at around 230 load. i checked all the cuts and everything is above that but it bucks and kicks in that load area. no knock or even weird afr's. ill email the rom and log if anyone has any ideas. thank you
the only other thing i can think of is that its running out of fuel pump. im sure what pump is in it, it might be stock. i logged injector info and got 14ms pulse widths at 40% duty cycle.
rc 740's set at 640. i can email you the rom and a log if you would like to make sure i did everything right. 40% and 14ms is when i hit the wall. im sure when i get up in the higher boost it works the injectors more but i dont push it because i want to fix this issue before any harm is done to the motor. i know at 40% and 14ms im getting a afr of 12.5 ish now in the map it should be lower than that so im back to wondering what the stock fuel pump will handle and if maybe they put the stock pump back in when they sold the car. i know they changed out the turbo kit and charge piping and it looks as if it had a whole fuel system in the truck judging by the wholes and the brackets.
Last edited by evoplaytime; Aug 2, 2010 at 11:31 AM. Reason: to complete a thought
adcgn45 so on that note. is the tephra mod wrong and this could be caused by lean spool even though in the rom i have it as disabled? but with a stock rom that would be enabled?
what sort of boost are you running? a stock pump will pump stock injectors safely to about 22-23 psi .if i were you id take the time to pop the back seat and have look at that pump. if its black its stock. change it and put the walbro in
+1 on the boost cut. Raise the boost limit.
+1 on the injector scaling/latency adjustment. Your mid fuel trim is a little high.
The boost enhancement tables were never properly labeled. The values in that table are well below the point of boost. Don't worry about them.
The fuel cut table is set right for the load that you are hitting. It allows for a small margin of safety. I would leave it alone.
As for idle, as stated above you could add a couple degrees of timing in the idle regions. It will most likely tame the lope a little. A value around 11 should suffice. Make the low octane and the high octane timing tables the same in the idle area.....helps make idle more stable.
Before making changes to the idle tables...try just raising the timing as I just stated. If the car is still loping hard, then raise the desired idle rpm a little as stated above.
The tune itself is, as stated above, done pretty well. There is a few little things here and there that could be cleaned up, but it won't really solve your issue.
I would just disable Lean Spool via Periphery FBA bit 0. Change it to =1. Your condition should greatly improve.
Once you get the car to make consistent pulls (as I am certain you are not getting the same thing in every pull because of lean spool) then you can post up a log of a pull from 2500 out to redline. We can then tweek from there.
Hope this helps.
Paul
+1 on the injector scaling/latency adjustment. Your mid fuel trim is a little high.
The boost enhancement tables were never properly labeled. The values in that table are well below the point of boost. Don't worry about them.
The fuel cut table is set right for the load that you are hitting. It allows for a small margin of safety. I would leave it alone.
As for idle, as stated above you could add a couple degrees of timing in the idle regions. It will most likely tame the lope a little. A value around 11 should suffice. Make the low octane and the high octane timing tables the same in the idle area.....helps make idle more stable.
Before making changes to the idle tables...try just raising the timing as I just stated. If the car is still loping hard, then raise the desired idle rpm a little as stated above.
The tune itself is, as stated above, done pretty well. There is a few little things here and there that could be cleaned up, but it won't really solve your issue.
I would just disable Lean Spool via Periphery FBA bit 0. Change it to =1. Your condition should greatly improve.
Once you get the car to make consistent pulls (as I am certain you are not getting the same thing in every pull because of lean spool) then you can post up a log of a pull from 2500 out to redline. We can then tweek from there.
Hope this helps.
Paul
See above.
Last edited by Boosted Tuning; Aug 2, 2010 at 03:06 PM. Reason: added more info.
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