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| No fuel pressure to test port on fuel rail but good pressure from pump when disconnec (Page 1/3) |
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Steelers8
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JUL 05, 10:53 PM
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I just put heads on and car ran before. Put new Coil, Distributor, Injectors, Fan Switch, and Coolant Switch. Car starts if carb cleaner sprayed in but pump disconnected before filter has 70 lbs but nothing at valve on fuel rail? Any ideas because seems to have pulse but no pressure? ------------------
KCBSR
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Mike in Sydney
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JUL 06, 12:38 AM
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I'm guessing clogged fuel filter, pinched fuel line between output from pump and fuel rail, or faulty fuel pressure regulator. If you disconnect the fuel line from the fuel rail do you get fuel when you turn on the ignition? CAUTION: Do not crank car. Do not check with warm or hot engine. Do not do alone. Have a Class B fire extinguisher close by.
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Steelers8
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JUL 06, 12:56 AM
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New fuel filter. With pump hooked up 10 lbs before and after filter. Gas to fuel rail. No pressure out the valve. Gas coming out return but pressure does not go up in pinch return. Could pressure regulator just stop working while I was putting heads on? ------------------
KCBSR
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Mike in Sydney
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JUL 06, 02:01 AM
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Patrick
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JUL 06, 02:14 AM
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| quote | Originally posted by Steelers8:
pump disconnected before filter has 70 lbs but nothing at valve on fuel rail?
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| quote | Originally posted by Steelers8:
With pump hooked up 10 lbs before and after filter. Gas to fuel rail. No pressure out the valve.
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???
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Steelers8
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JUL 06, 02:27 AM
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Guess I will have to change the regulator then. Seems odd it went out when it was fine before. ------------------
KCBSR
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Steelers8
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JUL 06, 02:40 AM
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| quote | Originally posted by Patrick:
???
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Just powering up the pump with battery charger and when I just pressure with tester before the filter reads 10. Disconnected and put after filter 10. Before filer just pump not connected to fuel line 70.------------------
KCBSR
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Will
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JUL 06, 08:54 AM
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| quote | Originally posted by Steelers8:
Just powering up the pump with battery charger and when I just pressure with tester before the filter reads 10. Disconnected and put after filter 10. Before filer just pump not connected to fuel line 70.
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So you have 70 psi upstream of the fuel filter and 10 psi at every point downstream of the fuel filter? Sounds like your fuel filter was bad out of the box.
However, you also said the 10 psi at the rail does not increase when you pinch off the regulator return?
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Steelers8
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JUL 06, 08:59 AM
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No I got 70 before fuel filter without being connected to the fuel filter but if connected through the system 10 before and after the filter but no pressure at the valve at the fuel rail. A lot of gas on the return line but doesn’t increase if I pinch off the return. ------------------
KCBSR
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Steelers8
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JUL 06, 09:02 AM
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| quote | Originally posted by Will:
So you have 70 psi upstream of the fuel filter and 10 psi at every point downstream of the fuel filter? Sounds like your fuel filter was bad out of the box.
However, you also said the 10 psi at the rail does not increase when you pinch off the regulator return? |
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KCBSR
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