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Old 09-07-2012
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Bad FPR?

My fuel mileage has been unstable lately and I noticed a rich smell out of my exhaust pipe, threw a gauge on test port on rail and had 65psi at idle, unhooked vacuuming going to regulator and needle flickered a quick second but stayed at 65psi. Shouldn't it have rose 5-10 I have been reading? Does this seem normal or is my regulator bad, if so my next question would be how do I get the quick disconnect piece off the ruber hose connected to the regulator??? Engine is a 2.5 in 98 ranger. Truck is sitting in garage waiting .
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Old 09-07-2012
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At 65 PSI, the fuel pressure is exactly where it should be. Your mechanical returnless fuel system provides a constant pressure to the fuel rail that does not vary with vacuum. For 98+ Rangers, the Fuel Pressure Regulator is inside the gas tank. The hose you pulled is on the Fuel Pulse Damper.
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Old 09-07-2012
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Wow this is what really makes these forums and places like this useful, people like you!! I would have never guessed that, a fuel pulse damper, wat the hell? Anyways from what I described, your telling me m engine is operating normally and everything is ok in that department?
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Old 09-07-2012
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Quote:
Originally Posted by vipertblck View Post
Anyways from what I described, your telling me m engine is operating normally and everything is ok in that department?
I wouldn't go that far but I do think that your fuel pressure is OK.
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Old 09-07-2012
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Well right, but ill check O2 sensor operation & what not, glad fuel is most likely fine. I had a p0133 code, 02 sensor slow to respond bank 1 sensor 1. Maybe that sensor is starting to get weak
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Old 09-08-2012
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Quote:
Originally Posted by vipertblck View Post
Wow this is what really makes these forums and places like this useful, people like you!! I would have never guessed that, a fuel pulse damper, wat the hell? Anyways from what I described, your telling me m engine is operating normally and everything is ok in that department?

Am I the only one that read "fuel pulse damper" and immediately thought something Star Wars related?
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