Fuel Pressure #'s
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From: North Cackalacky
Fuel Pressure #'s
With my electric fuel pressure gauge it read about 58psi at idle and pretty much holds that under acceleration but I haven't ever really paid all that much attention to it. I don't ever drive at WOT so I'm not sure it would hold that much. I drove a 00 model today with a manual gauge and it idled at 58psi and at WOT it fell off to 54psi, is this normal? This truck is completely stock and feels way under powered. At WOT it holds 2700+ psi at 39% duty cycle, passed buzz and contribution. I need to check the boost #'s but I have to rig up a gauge. Any input?
Post Fiend
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From: Texas
So after driving around with a DP Tuner, your saying a stock truck seems way under powered? 
Fuel pressure sounds OK to me. What did the boost numbers look like? Perhaps leaking up pipes or intercooler boots?
Fuel pressure sounds OK to me. What did the boost numbers look like? Perhaps leaking up pipes or intercooler boots?
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From: North Cackalacky
Yeah, I had to go drive my truck in stock so I would have something to compare to. It still seems weak compared to mine. No up pipe leaks or boots. I gotta rig up a gauge to check boost #'s. One other thing I thought about was a stuck partially closed EBP Valve restricting the exhaust, gonna check that too.
Post Fiend
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From: Texas
A stick should run better than an auto in stock mode. Check the MAP reading on your scanner to get boost pressure. Depending on how it reads, you may need to subtract atmospheric pressure to get the boost pressure.
If you lean into it, when do you feel the boost kick in? The motor should really start to wake up around 1700 - 1800 rpm's and you should notice a puff of black smoke when shifting a little smoke over 1800 rpms.
If you lean into it, when do you feel the boost kick in? The motor should really start to wake up around 1700 - 1800 rpm's and you should notice a puff of black smoke when shifting a little smoke over 1800 rpms.
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From: North Cackalacky
I knew you could convert it from the MAP reading but i wasnt sure how to do it. IIRC it was about 14.1 at idle and I wasnt watching it under acceleration. I wasnt paying attention to when it kicked in cause it was such a slow turd and I was watching icp's. So what is the proper way to convert the MAP reading?
