I've been losing 2 tenths et and 3 mph in the 1/4 mile at the drag strip recently.
I pulled a plug and it was lean.
I set the fuel pressure from 43 psi to 40 psi about a week ago.
Could 3 psi make that much of a difference? I didn't have my pressure gauge at the strip, but I put it back to 43 psi when I got back.
I changed the fuel filter 4-01-09.
Could the fuel filter be clogged already? Should I change it anyways just to be sure.
The fuel pump is 3-4 years old, 190 lph Holley. Could the pump be on it's way out? I fill the gas tank to half when I race which is 1-2 times a week.
I usually use a Motorcraft fuel filter. Are the other brands ok like Fram? I don't think I can get a Motorcraft around here for today.
Fuel direction arrow on the filter should be pointing at the drivers side rear tire , right?
Thanks for the help!
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1993 GT Mustang / Ford Racing GT-40 Crate Motor B-303 Cam / Tremec T-5Z / 4.30 Gears / Detroit Locker / Moser 31 Spline Axles/ Subframe Connectors / BMR Upper and Lower Control Arms / Lakewood Adjustable Drag Shocks/
Best ¼ Mile Time – 13.18 @ 104mph
I pulled a plug and it was lean.
I set the fuel pressure from 43 psi to 40 psi about a week ago.
Could 3 psi make that much of a difference? I didn't have my pressure gauge at the strip, but I put it back to 43 psi when I got back.
I changed the fuel filter 4-01-09.
Could the fuel filter be clogged already? Should I change it anyways just to be sure.
The fuel pump is 3-4 years old, 190 lph Holley. Could the pump be on it's way out? I fill the gas tank to half when I race which is 1-2 times a week.
I usually use a Motorcraft fuel filter. Are the other brands ok like Fram? I don't think I can get a Motorcraft around here for today.
Fuel direction arrow on the filter should be pointing at the drivers side rear tire , right?
Thanks for the help!
-----------------------------------------------------------------
1993 GT Mustang / Ford Racing GT-40 Crate Motor B-303 Cam / Tremec T-5Z / 4.30 Gears / Detroit Locker / Moser 31 Spline Axles/ Subframe Connectors / BMR Upper and Lower Control Arms / Lakewood Adjustable Drag Shocks/
Best ¼ Mile Time – 13.18 @ 104mph