Is my rail pressure too high?
#1
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Is my rail pressure too high?
I just installed an Autometer rail pressure gauge yesterday and it's showing 7500 psi at idle and constantly bounces between 20-21k cruising at 70mph empty. From what I've been reading on here, this sounds high. I have the smarty set on #7 with everything on default except the timing, which is on 4. Your thoughts and comments are appreciated.
#3
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Close at idle, a little high cruising.
Try putting the RP at 1 and see what happens. With my truck, it runs a little high sometime, I have to watch it.
Try putting the RP at 1 and see what happens. With my truck, it runs a little high sometime, I have to watch it.
#4
Its high across the board, 6-6.5k at idle and cruising should be around 17k. You cruise too long at 20-21k and its going to hurt an injector eventually. This is all given your gauge is correct.
Try backing the Smarty down to a lower setting and see what happens.
Try backing the Smarty down to a lower setting and see what happens.
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I backed the Smarty down to 1 on rail pressure and saw no difference in cruising pressure or idle pressure. I also tried it on 3 and cruising pressure was about 22-23k at 70mph and idle was about 8k.
#7
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04.5's are different...LOL Mine at idle in park is 6,580-7,000. If I put it in drive with my foot on the brake it is 7,500 to 8,500. Cruising at 70-75 MPH depending on how much I am pressing on the go pedal it is anywhere from 18,500 to 21,500. Pulling my trailer it is a little higher. This is with NO pressure increase with the Smarty or my Quad set to 0.
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#8
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I did not know that... I can keep mine around 19k cruising. I have had some problems with RP being a little high. I do what I can to keep it down...
#9
Try the default on RP to see if it makes a difference.
What gauge are you using?
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Default is #2 and that's where I see 7500 at idle and 20-21k at 70mph. I also see the same numbers with the Smarty set to stock pressure. My first post was incorrect. I have torque management and timing set to 4. I am using a brand new Autometer Ultra-Lite rail pressure gauge.
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Haven't tried backing TQ management down, that idea just hit me this morning too. I'm thinking also that my rail pressure sensor could be a little off. The gauge bounces constantly between 20 and 21k at 70mph. It seems pretty steady at lower pressures though.
#15
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my 04.5 stock with performax rp gauge shows 6-6.5k at idle and 17-19k cruising. i hardly ever see over 20k unless i mash on it. seems to me your running a little high...