post #1 of Old 11-02-2011, 12:39 PM Thread Starter
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2004 WJ 
Join Date: Mar 2010
Location: Moon Twp
Posts: 281
High Fuel Pressure - Bad Filter/Regulator?

I just checked my fuel pressure last night and it was 52 psi with the key on but when started it jumped to 62 psi. Increasing the throttle would make the pressure bounce and then settle back down at 62 psi with constant throttle.

I know the FSM says 49 +-5 psi. I am assuming that the problem is with the pressure regulator (fuel filter). I had just replaced it last year with a WIX.

The reason for the fuel pressure test is poor fuel mileage 12-13mpg. I've already done, fluids, filters, cleaned TB, new TPS, new IAC, plugs, and just last week O2s.

Has anyone had this high fuel pressure or has anyone had problem with the WIX fuel filters?

3JsWJ is offline  
post #2 of Old 11-03-2011, 07:13 AM Thread Starter
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2004 WJ 
Join Date: Mar 2010
Location: Moon Twp
Posts: 281
Can anyone recommend the best fuel filter to use? WIX, Purolator, Fram,...Mopar?
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post #3 of Old 11-03-2011, 10:00 AM
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2001 WJ 
Join Date: Sep 2010
Location: Johannesburg South Africa
Posts: 744
would like to see what info comes out here, am in a similar situation, just haven't measured fuel pressure, however my one smells very rich, and smokesat idle, smells very rich, changed even fuel filter as well however fuel consumption is good
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