Need help can't wait to drive car.

92Rustang · 12-21-2001, 12:47 PM

I just got my new springs on and RR adjusted car sounds great. One problem I switched to a BBK FPR from a holley and when the pump turns off pressure drops to zero fast. I do not smell gas and I can not find any leaks. I would think at 38 psi I would see gas somewhere? I call summit and they seem to think that it is OK the fuel is going to the return line. My holley would hold pressure for a day. Also what would be the point in the pump turning on if the system did not hold pressure? Thanks for the help guys I can not wait to see how this thing runs not that I have the valve train right.

DRASTiK · 12-21-2001, 08:48 PM

If I remember correctly, last time I put a gauge on my FP using the stock FPR, the pressure dropped after I turn the key and hear the pump come on and off. I thing it just squirts some fuel in there to start the car, and then starts pulling some more once it's running. Does it start okay?

92Rustang · 12-22-2001, 11:03 AM

The car does have a small miss. It is heard to hear with the cam ,and when idleing you can smell gas.

The car cranks up fine ,but I have to give it gas for about two minutes before it will idle. Right after I put the motor in it started great for about 800 miles. I don't think it is problem with the valves because. The problem was there before the new springs. Could a leaking injector cause this problem, how do I test the injectors? Could I have a sensor out or a wasted computer?

Once I let the car idle for a couple for minutes and kill it. When I start it again it idle fines, but still has the miss. I'm lost.

PKRWUD · 01-03-2002, 08:55 PM

test for a leaking injector by clamping the return hose when an assistant turns off the engine. If the pressure drops, it's one or more injectors.

Take care,
-Chris

Chevysucks · 01-05-2002, 12:10 AM

i had sort of the same prob in my old gt. it wouldnt idle worth **** when i got it, so i put in a new tps-throttle position sensor and that seemed to help a bit but it still was doing it. so i looked around in my engine and i saw that it was wet around one of my front injectors. when i finally was going to put a new one in and pulled the old one out - on the bottom on the cap was cracked in like 5 different spots. when i put in the new one it idled fine.
hope this helps you out.

92Rustang · 01-05-2002, 11:11 PM

I'm going to try and figure out my fuel pressure Tuesday. It should be in the upper 40's. I have not touched the car because of the holiday's and the fact the it has not been over 20 degree's in two weeks. I'm looking to buying new injectors in a couple of weeks. Like I said before the only thing I bought used were the injectors and MAS(cal 24#) everything else is new. I will let you guys know when I find something. Thanks for the help.

12-21-2001, 12:47 PM	#1
92Rustang Registered Member Join Date: Feb 1999 Location: Smithton, IL, US Posts: 215	Need help can't wait to drive car. I just got my new springs on and RR adjusted car sounds great. One problem I switched to a BBK FPR from a holley and when the pump turns off pressure drops to zero fast. I do not smell gas and I can not find any leaks. I would think at 38 psi I would see gas somewhere? I call summit and they seem to think that it is OK the fuel is going to the return line. My holley would hold pressure for a day. Also what would be the point in the pump turning on if the system did not hold pressure? Thanks for the help guys I can not wait to see how this thing runs not that I have the valve train right. __________________ 92 GT 5-speed Windsor Jr,E303,1.7RR,Cobra intake,65mm TB,155lph,24 lbs,75mm MAS,shorties,h-pipe, 2.5 flowmaster,Black magic,Holley adj fuel, 3.73 No times yet. 13.6 before heads,cam,inj,rr www.fordmustanggt.com

12-21-2001, 08:48 PM	#2
DRASTiK Registered Member Join Date: May 2001 Location: Yuma, AZ Posts: 536	If I remember correctly, last time I put a gauge on my FP using the stock FPR, the pressure dropped after I turn the key and hear the pump come on and off. I thing it just squirts some fuel in there to start the car, and then starts pulling some more once it's running. Does it start okay? __________________ Dave 88 GT - 13.4@106 on street tires (2.2 60ft) My Stang RHC member #75 My stang is FOR SALE!!

12-22-2001, 11:03 AM	#3
92Rustang Registered Member Join Date: Feb 1999 Location: Smithton, IL, US Posts: 215	The car does have a small miss. It is heard to hear with the cam ,and when idleing you can smell gas. The car cranks up fine ,but I have to give it gas for about two minutes before it will idle. Right after I put the motor in it started great for about 800 miles. I don't think it is problem with the valves because. The problem was there before the new springs. Could a leaking injector cause this problem, how do I test the injectors? Could I have a sensor out or a wasted computer? Once I let the car idle for a couple for minutes and kill it. When I start it again it idle fines, but still has the miss. I'm lost. __________________ 92 GT 5-speed Windsor Jr,E303,1.7RR,Cobra intake,65mm TB,155lph,24 lbs,75mm MAS,shorties,h-pipe, 2.5 flowmaster,Black magic,Holley adj fuel, 3.73 No times yet. 13.6 before heads,cam,inj,rr www.fordmustanggt.com

01-03-2002, 08:55 PM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	test for a leaking injector by clamping the return hose when an assistant turns off the engine. If the pressure drops, it's one or more injectors. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

01-05-2002, 12:10 AM	#5
Chevysucks Registered Member Join Date: Mar 2000 Location: Stroudsburg, PA, USA Posts: 150	i had sort of the same prob in my old gt. it wouldnt idle worth **** when i got it, so i put in a new tps-throttle position sensor and that seemed to help a bit but it still was doing it. so i looked around in my engine and i saw that it was wet around one of my front injectors. when i finally was going to put a new one in and pulled the old one out - on the bottom on the cap was cracked in like 5 different spots. when i put in the new one it idled fine. hope this helps you out. __________________ 88 Stang 306 ci. GT Mustang heads- ported and polished/milled---Soon to be AFR 185cc 1.7 crane roller rockers/extra hardened pushrods FRPP X-303 Cam Stock Intake-1 inch intake spacer BBK Cold Air Induction Stock Injectors--going to 24 pounders BBK Full Length Headers Mac 2.5 inch Cat-Back 8 Point Cage Sub Frame Connectors World Class T-5 Steeda Shift Cable,Quadrant,Firewall adjuster King Cobra Clutch Pro 5.0 Shifter Alunimum Driveshaft/ Drive shaft loop Kenny Brown suspension 3.55 gears

01-05-2002, 11:11 PM	#6
92Rustang Registered Member Join Date: Feb 1999 Location: Smithton, IL, US Posts: 215	I'm going to try and figure out my fuel pressure Tuesday. It should be in the upper 40's. I have not touched the car because of the holiday's and the fact the it has not been over 20 degree's in two weeks. I'm looking to buying new injectors in a couple of weeks. Like I said before the only thing I bought used were the injectors and MAS(cal 24#) everything else is new. I will let you guys know when I find something. Thanks for the help. __________________ 92 GT 5-speed Windsor Jr,E303,1.7RR,Cobra intake,65mm TB,155lph,24 lbs,75mm MAS,shorties,h-pipe, 2.5 flowmaster,Black magic,Holley adj fuel, 3.73 No times yet. 13.6 before heads,cam,inj,rr www.fordmustanggt.com

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