Swarzkopf said:Shoots up and then drops...sounds like the regulator to me. Do you have a Haynes/Chiltons manual? They describe a test procedure involving pinching the feed and then the return line; you might want to try this.
LoudToy958 said:Does it drop while the car is running or just with the key on?
Might me a bad injector bleeding off pressure if the car is not running. Then again, if you didn't adjust the FPR, that could be the issue as will. I doubt that though. I just installed mine as well. Here is what mine does.
Mine shoots up to about 43psi key on, then drops to about 40-41 at start up, then after a minute of warm up sits between 37-39 which I am told is normal.
With just the key on it will sit at about 42psi all day. Even with the key off actually.
Should the gauge read with the car off? Kinda hard to hook it up wrong, just curious..........
94gts said:my regulator will do the same thing when you turn the key, the pressure drops off. but i have no running issues with the car
CManT1914 said:Yea as far as I know mine runs all right.....
EXCEPT IT KEEPS SURGING AND DYING!!!
No but seriously it holds pressure when its running. But it's at 40psi at idle and 50 under load, too much huh?
94gts said:yea 50 under load is way too much. take the vacum line off the regulator then set the fpr guage to say 43(with the line off this is what it will be under load).
the surging and dyng mite be vacum related. thats what my cars issue was. after the heads and intake it wouldn't idle for anything. turns out i had the vacum lines all outta wack
Yeah, cap the vac line. Technically it arguably makes a difference.18mustangs said:Here's a stupid question, but it's been a long time since I had to adjust my fuel pressure. With the vacuum line off of the AFPR do you plug the vacuum line while adjusting the fuel pressure or just let it hang?
Tim
HISSIN50 said:Yeah, cap the vac line. Technically it arguably makes a difference.
FWIW, some aftermarket regulators bleed off pressure very quickly when the car is off (which is not bad - no need to keep high pressure in those lines 24/7).
Good luck Chis.
18mustangs said:Thanks for clearing that up. My Aeromotive holds pressure well, but if it sits over night it zeros out.
Tim
Mine was like that when it was younger.LoudToy958 said:Yours zeros out over night. Mine keeps pressure for days.
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