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Fuel Pump?

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Old Nov 7, 2003 | 07:03 PM
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Fuel Pump?
I've got a 1987 Bronco II with 2.9L EFI and Auto. When starting up I have to pump the pedal a couple of times before it starts and also when stopped at a light or something when I press on the gas it kind of hesitates for about a two seconds and then goes like nothing is wrong. Also I am getting a lot worse gas mileage lately.
 
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Old Nov 7, 2003 | 08:08 PM
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When was the last time you did a tune up & fuel filter. Also testing the fuel pressure, checking the fuel pressure regulator vacuum line for gas and pulling the codes is were I would start.
 
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Old Nov 7, 2003 | 08:17 PM
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That would be the top hose going in correct?
 
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Old Nov 7, 2003 | 08:28 PM
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The FPR vacuum line is a small plastic type of line and it runs to the tee were the brake booster and auto tranny gets their vacuum.
 
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Old Nov 9, 2003 | 07:53 PM
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Where is the Fuel pressure regulator located? Also, I just gave it a tune up and replaced the fuel filter.
 
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Old Nov 9, 2003 | 08:09 PM
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On the drivers side fuel rail.
 
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Old Nov 13, 2003 | 01:39 PM
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The When I take it off the "T" it doesn't spill gas but when I have it off for more than a few seconds gas starts to leaks out of it. Any Ideas?
 
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Old Nov 13, 2003 | 03:03 PM
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If there's any gas or even a strong gasoline odor coming from the vacuum line on the back of the FPR, then your FPR is shot.

There's a diaphragm inside the FPR that should separate fuel from vacuum at all times. Once that diaphragm starts leaking, the vacuum sucks gas into the intake. This results in running rich (which results in poor mileage and eventually a failed catalytic converter) and it affects the fuel pressure. Neither of which is conducive to a well-running B2.
 
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Old Nov 13, 2003 | 04:28 PM
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Will that also cause hesitation at stops and hard starting?
 
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Old Nov 14, 2003 | 05:08 PM
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I can't say for sure, but if the fuel pressure isn't where it should be it seems possible.
 
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Old Nov 14, 2003 | 06:49 PM
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Yep.
 
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Old Nov 15, 2003 | 09:43 AM
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Thanks. I will try it and get back to you.
 
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Old Nov 16, 2003 | 03:23 PM
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Working great. Now all I have to do is get the camber problem taken care of , Suggestions?
 
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