Dropping fuel pressure.....need help!
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Dropping fuel pressure.....need help! My fuel pressure drops from 62psi to mid 40's then sometimes only to 50psi under hard acceleration.
This just started happening. Is that alright? I have the racetronix upgraded fuel pump. This never used to happen and I can't pinpoint what's causing it.
I'm worried that when I spray my nitrous it'll be more of an issue.
Any help or guidance would be greatly appreciated.
Thanx
This just started happening. Is that alright? I have the racetronix upgraded fuel pump. This never used to happen and I can't pinpoint what's causing it.
I'm worried that when I spray my nitrous it'll be more of an issue.
Any help or guidance would be greatly appreciated.
Thanx
You sure it hasn't been doing it all along and you just haven't noticed? On the big end mine is down to about 50#'s...give or take. Kinda hard to watch it when running hard. Or is this when you're n/a?
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Originally Posted by silverbullet02
You sure it hasn't been doing it all along and you just haven't noticed? On the big end mine is down to about 50#'s...give or take. Kinda hard to watch it when running hard. Or is this when you're n/a?
I'm going to double check it on the way home and see if it wasn't a freak thing
Originally Posted by Rawr256
Spray the bitch and find out if there are problems...
In my last dyno pull the fuel psi goes from 62-57 psi but holds AFR just fine. Fuel filter? I dunno dude but I hope your fuel pump is easier to change than mine!
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Originally Posted by Chris Stewart
lmao
In my last dyno pull the fuel psi goes from 62-57 psi but holds AFR just fine. Fuel filter? I dunno dude but I hope your fuel pump is easier to change than mine!
In my last dyno pull the fuel psi goes from 62-57 psi but holds AFR just fine. Fuel filter? I dunno dude but I hope your fuel pump is easier to change than mine!
Any suggestions????
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If it's not the gauge or filter, then like I have suggested a return and reg at the rails. Mine holds steady at 60psi even on the big hits, never has waviered. Have you ever run the gauge while spraying? or you said it just happened out of the blue?
Robert
Robert
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Originally Posted by Robert56
If it's not the gauge or filter, then like I have suggested a return and reg at the rails. Mine holds steady at 60psi even on the big hits, never has waviered. Have you ever run the gauge while spraying? or you said it just happened out of the blue?
Robert
Robert
I'm not going to spray with that big of a fuel pressure drop under N/A conditions. Which means it may be a while till I hit 10's.
And I have 2 full 10lb bottles of juice in my house awaiting the chance to hit the elusive 10.XX. 
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Originally Posted by silverbullet02
How's the AFR?
Every time I let off the gas it goes way lean..........which I hear is normal.
I'm thinking I should put a bottle of juice in and run it down the freeway to see what happens to the A/F/.....
What do you guys think? Is that a bad idea?
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Originally Posted by Chris Stewart
lmao
In my last dyno pull the fuel psi goes from 62-57 psi but holds AFR just fine. Fuel filter? I dunno dude but I hope your fuel pump is easier to change than mine!
In my last dyno pull the fuel psi goes from 62-57 psi but holds AFR just fine. Fuel filter? I dunno dude but I hope your fuel pump is easier to change than mine!
Could it be a bad fuel pressure regulator?
Originally Posted by 00Vette
I'm thinking I should put a bottle of juice in and run it down the freeway to see what happens to the A/F/.....
What do you guys think? Is that a bad idea?
What do you guys think? Is that a bad idea?
that's what I would do,
I would trust a good wideband
that will tell you what your engine is actually seeing
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Originally Posted by WAHUSKER
FILL THE GAS TANK! Mine drops like a rock under 1/2 tank....
Thanks.
Depending on how things go, I may make it out Saturday......we'll see.
Originally Posted by 00Vette
I'll try that! It started to happen when I went way way empty. And it got better when I added just under a 1/4 tank of gas. I'll try filling it up past 1/2 tank and see what happens.
Thanks.
Depending on how things go, I may make it out Saturday......we'll see.
Thanks.
Depending on how things go, I may make it out Saturday......we'll see.
I hope everything turns out ok, my suggestion..........stay N/A, lol, this way I can keep up w/ u.
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Originally Posted by Layn_Low_247
Man John, do you and your car have a love/hate like mine?
I hope everything turns out ok, my suggestion..........stay N/A, lol, this way I can keep up w/ u.
I hope everything turns out ok, my suggestion..........stay N/A, lol, this way I can keep up w/ u.
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Just filled my car up to 3/4 of a tank and under WOT N/A my fuel pressure drops to about 52psi.
Does this happen to anyone else? Should I be concerned? I'm thinking of heading to Bremerton tomorow and see if the car will be okay. I'm going to run down the fuel and put some race gas in to be safe, but I'm still worried!
Does this happen to anyone else? Should I be concerned? I'm thinking of heading to Bremerton tomorow and see if the car will be okay. I'm going to run down the fuel and put some race gas in to be safe, but I'm still worried!