stock chip? what kinda wastegate control are you using?
backfire solved, now boost problem?
Thanks to the hints on the board, I solved the morning start backfire by tweaking the cam sensor CCW about 1/16" - no more backfire!
With that out of the way, I'm working on the drivability. The fuel system has been upgraded, but otherwise the car is stock (see sig).
If I take of from a light (no powerbrake), I get a nice healthy bark on the 1-2 shift and 16-17 PSI boost. Unfortunately, things go down hill from there. Once in second gear, the boost drops to 13-15 (hunting) and the same in third gear. I'm at a loss as to why?
If I can get 17psi in first, I don't think my cat is clogged, or it wouldn't be able to get up to boost, right?
T-link is showing no knock, no retard, and 820-830s mv. A bit rich, but safe - or too rich? EGTs never break 1400, though I don't push it through the top of 3rd.
Any ideas why the boost might be hunting?
Thanks!
With that out of the way, I'm working on the drivability. The fuel system has been upgraded, but otherwise the car is stock (see sig).
If I take of from a light (no powerbrake), I get a nice healthy bark on the 1-2 shift and 16-17 PSI boost. Unfortunately, things go down hill from there. Once in second gear, the boost drops to 13-15 (hunting) and the same in third gear. I'm at a loss as to why?
If I can get 17psi in first, I don't think my cat is clogged, or it wouldn't be able to get up to boost, right?
T-link is showing no knock, no retard, and 820-830s mv. A bit rich, but safe - or too rich? EGTs never break 1400, though I don't push it through the top of 3rd.
Any ideas why the boost might be hunting?
Thanks!
1 - 5 of 5 Posts
1400*F sounds a bit too rich to me. yup
The chip is a Jay Carter 93, and I run Chevron 94 at sea level. Stock adjustable wastegate acutator.
It's been quite cool today (35-50f), which normally would be a good thing, but with the 13-15 psi in second things aren't as good as they could be.
It's been quite cool today (35-50f), which normally would be a good thing, but with the 13-15 psi in second things aren't as good as they could be.
EGT too low, O2 readings a little high. Lower the fuel pressure, see if it gets better. Go about one psi at a time, to be safe.
1 - 5 of 5 Posts
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