TJ's Motors built/in (working on KR issues now, update 9-12) - Page 13 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 08-15-2007, 11:37 PM   #121
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Got the fuel pressure checked tonight. I am 99.9% sure that is the problem. It was 39-40 PSI at idle and only 48PSI at WOT. So is there any possiblity that it could be a clogged filter (because i have one right in the trunk and i dont imagine it would hurt to try it).
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Old 08-16-2007, 09:40 AM   #122
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If it hasen't been changed in a while you should swap it out either way.
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Old 08-16-2007, 09:57 AM   #123
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Remind me...what is the spec for your year to be acceptable?
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Old 08-16-2007, 11:05 AM   #124
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Quote:
Originally Posted by BillBoost37
Remind me...what is the spec for your year to be acceptable?

PSSSSSSSSSSSST Bill... TechInfo - 48-55 PSI


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Old 08-16-2007, 12:30 PM   #125
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Well after pondering this idea for a little while last night andthis morning.... I came up with.... it is 48 which is the boaderline of what i am suppose to have. That is at 4000 rpms (car was in N and that is as high as it goes, as everyone knows), most of my KR comes in at 4000 and gets higher as the rpms go higher. So i may try to find a person with a tester that can like reach in the car of something and test it at higher then 4000(if you guys think there will be a difference). Also maybe it is the filter (higher rpms it may be struggling). I dunno i will change that out and maybe it is that. Anymore ideas?
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Old 08-16-2007, 12:47 PM   #126
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Was that with the vac line to the FPR disconnected? I don't know if there would be a difference, but I'd think that you'd want to have one you can read from the drivers seat. I don't think you dump nearly as much fuel in holding at 4k in neutral as you would if you were WOT... That'* almost assuming your injectors are outflowing your pump....
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Old 08-16-2007, 01:12 PM   #127
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No the vac line wasnt dissconnected.

I may go and get it checked at my cousins, i am pretty sure he has one that can go right in the car.
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Old 08-17-2007, 10:58 PM   #128
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Not the cat, swapped the exhaust off the black car tonight and KR is the same. So i am back to thinking fueling issue. But i am going to check a few other things also
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Old 08-17-2007, 11:20 PM   #129
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Pull all 6 plugs and let'* see some pics.
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Old 08-18-2007, 10:17 AM   #130
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You gapped them at .060 and they were used right? Maybe the cam needs them cooler and gapped smaller?
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