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Author
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Topic: adjusting fuel pressure
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ShiftyGT
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Member # 3862
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posted
 
 
New engine is running a little rich i think. Seems to bog a little at the lower RPM. The FPR that i have was on a higher horse power car originally, so i am guessing i probably need to turn it down a little.
Any tips for adjusting the FP? unfortunatley i dont have a gauge yet. Can i just turn it down till the rich smell leaves the exhaust?? or would it be to easy to drop it down to a lean condition??
Im new to this area so any tips would be great!
Thanks all
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1990 GT, Back in action
Posts: 396 | From: Chico CA | Registered: Dec 2003
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Jeff S
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Member # 371
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posted
Most cars regardless of horsepower level run at the factory setting of 40psi with the vacumn line discconected from the regulator. I wouldn't suggest adjusting your FP without having a wideband o2 sensor to verify your WOT A/F. You may end up fixixing a rich condition down low but creating a lean condition up top at WOT.
Also, unless your MAF calibration is WAY off your o2 sensors should be able to correct for any lean rich conditions at idle/part throttle if they are in working order.
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'90 Mustang LX: 8.53 @ 157.92 w/ 1.33 60' on DR's
'10 ZR1: FOR SALE
'14 E63 S: RENNtech ECU
'04 Gallardo: UGR TTG
Posts: 2121 | From: San Jose, CA | Registered: Aug 2001
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ShiftyGT
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Member # 3862
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posted
so if i take the vaccum off the FPR will that eliminate it from the process and return the pressure to 40psi??
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1990 GT, Back in action
Posts: 396 | From: Chico CA | Registered: Dec 2003
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2stangs69-91
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Member # 1951
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posted
not if it is a adjustable one already. You need to set it with a fuel pressure gauge.
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69 Mustang on hold
1991 LX hatch getting a make over
1994 F150 4X4 351
2006 Yamaha V-max 1200 Modded
Posts: 3711 | From: Redding | Registered: Oct 2002
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Quick 88LX
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Member # 1950
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posted
quote:
Originally posted by 2stangs69-91:
not if it is a adjustable one already. You need to set it with a fuel pressure gauge.
Yup. You need a gauge to see what pressure your at. Don't guess with that new motor bro.
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"Men are Made, Not Born"
Car Picture : http://www.angelfire.com/theforce/quick88lx/
Original Member #495. Can I get my number back?
Posts: 1785 | From: Fairfield, CA/Okinawa, Japan | Registered: Oct 2002
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ShiftyGT
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Member # 3862
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posted
cool thanks for the advice.
So i looked through summit, MM&FF, and 5.0 resto. Does anyone sell a mechanical guage that is just bolts into the shrader valve and is ready to go??
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1990 GT, Back in action
Posts: 396 | From: Chico CA | Registered: Dec 2003
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Hungry Hippo
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Member # 537
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posted
kragen has them, they are like 40 bucks i think
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05 S4 Avant(wagon)
09 C6 H/C/I
Posts: 2959 | From: east bay | Registered: Nov 2001
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