cant keep my car running.
fuel pressure is at 80 psi. E85.
cam: https://www.summitracing.com/parts/CCA-54-480-11
ls1 intake manifold.
5.3 w/ 799 heads
Twin t4 61 mm turbos
10 psi springs in wg's
ebay boost controller and bov.
TR6060 6 speed tranny.
stock bottom end.
car struggles to start and idles high, like 1800.
it's tuning a little rich, like 11.1
i've been reading for days and watching lots of youtube. i wil continue to fiddle with it. but ANY help is appreciated.
thanks in advance!
80 psi of fuel pressure is way high, most run like 58 psi because that's what the injectors are rated at.
What fuel injectors are you running?
MAF dtc's need to set to first error, not NO MIL LIGHT.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
I had stared with what might be the worst tune shop in the worlds "partial tune"
Injectors: 990cc at 58 psi, which is a 94.3 lb
Thanks, I'll adjust the fuel pressure.
I'm going to guess you have a boost referenced fuel pressure regulator. More than likely your injectors will be set at 43.5 psi with the vacuum line unhooked to the regulator. However your injector data in the tune needs to match that.
If you drop the fuel pressure down from 80 you are going to have to completely start over tuning the VE
It has the vacuum port on the regulator, and I ran that to the manifold.
I don't mind starting over with the VE. basically i paid a shop for a tune, they couldnt figure out how to get it running right, they then over charged me and then over heated my engine and said thats it. Now i have a crappy partial tune, initially running WAY lean, I wasn't making boost due to bad Vband flanges, but now i've fixed the big list of issues.
I never intended to get into tuning, but here I am. I guess i got off lucky compared to some of their customers..
Last edited by jgibbons; 10-18-2016 at 08:50 AM.
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