Fuel cutoff?

OMAR · 10-02-2003, 09:17 PM

After swapping heads, cam, intake, injs.,MAM, etc., my car ran really rough so I thought: maybe too rich. Now, the needle on my FP guage somehow broke off right at the base so I'm not sure what the pressure is, but it was at 38-40psi before it broke. Turned the pressure down and it got worse so I turned it back up. Turned the pressure up a lil higher and it got better. I figured try a lil more and see what happens. The car shut off so I backed it down a tad, and it still won't start. I removed the gauge from the rail and there is no pressure with the key on. Could I have exceeded the allowable static pressure and broke the diaphram or burned out a relay or something? It sounds crazy but I can't figure it out! I checked the button in the hatch and it's still down, I can hear my T-rex prime when I turn the key, so could it be the 190 lph in-tank blew out or something?

bigred90gt · 10-02-2003, 10:47 PM

I would say, change your fuel filter. If your pump primes and you still get no pressure, the filter could be clogged.

Is your t-rex run off of the same relay as your in tank pump? Check the relay under the seat. If it clicks, I'd change the filter.

OMAR · 10-02-2003, 10:59 PM

The T-Rex taps in just ahead of the in-tank so I know power is getting there. It seems odd that the filter would clog all of a sudden too. My neighbor said: "You got gas in it?". Maybe my gauge is malfunctioning. I'm going to fill the gas can right now. I hope that's all it is. Be right back.

OMAR · 10-03-2003, 12:24 AM

I put a couple gallons in and still no pressure! But, when I turn the key, in addition to the T-Rex priming I also hear a hollow, gurgling kinda noise. What could that be?

10-02-2003, 09:17 PM	#1
OMAR Registered Member Join Date: Apr 2003 Location: ChiTown(So.Subs.) Posts: 41	Fuel cutoff? After swapping heads, cam, intake, injs.,MAM, etc., my car ran really rough so I thought: maybe too rich. Now, the needle on my FP guage somehow broke off right at the base so I'm not sure what the pressure is, but it was at 38-40psi before it broke. Turned the pressure down and it got worse so I turned it back up. Turned the pressure up a lil higher and it got better. I figured try a lil more and see what happens. The car shut off so I backed it down a tad, and it still won't start. I removed the gauge from the rail and there is no pressure with the key on. Could I have exceeded the allowable static pressure and broke the diaphram or burned out a relay or something? It sounds crazy but I can't figure it out! I checked the button in the hatch and it's still down, I can hear my T-rex prime when I turn the key, so could it be the 190 lph in-tank blew out or something?

10-02-2003, 10:47 PM	#2
bigred90gt 2 Stangs in the Stable Join Date: Apr 2002 Location: Baytown, TX Posts: 1,209	I would say, change your fuel filter. If your pump primes and you still get no pressure, the filter could be clogged. Is your t-rex run off of the same relay as your in tank pump? Check the relay under the seat. If it clicks, I'd change the filter. __________________ '90 GT Under construction Best E.T. = Fast @ High Speeds - OK So I Lie. So What!!! 04 F-150 STX 4.2L 5 spd Rice Haters Club Member #128

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10-02-2003, 10:59 PM	#3
OMAR Registered Member Join Date: Apr 2003 Location: ChiTown(So.Subs.) Posts: 41	The T-Rex taps in just ahead of the in-tank so I know power is getting there. It seems odd that the filter would clog all of a sudden too. My neighbor said: "You got gas in it?". Maybe my gauge is malfunctioning. I'm going to fill the gas can right now. I hope that's all it is. Be right back.

10-03-2003, 12:24 AM	#4
OMAR Registered Member Join Date: Apr 2003 Location: ChiTown(So.Subs.) Posts: 41	I put a couple gallons in and still no pressure! But, when I turn the key, in addition to the T-Rex priming I also hear a hollow, gurgling kinda noise. What could that be?