Recent content by Plattapuss

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    2003 Yukon xl low fuel pressure

    Im still going down the rabbit hole. I have searched and searched. I cannot find a pressure regulator that fits my flex rail that will provide anything above 48 psi.I don’t think one exists. If you know of one please let me know. Im thinking of trying to install an adjustable regulator . How...
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    2003 Yukon xl low fuel pressure

    Thank you so much for that very detailed explanation. Excellent information.
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    2003 Yukon xl low fuel pressure

    I completed 1,000 miles of my planned 2,000 mile trip from Idaho to San Diego. Lots of long grades to 6600 feet. Yukon and trailer were pretty loaded. She ran great the whole way. Dash fuel mileage average read 12 mpg in tow haul mode. I found some Ai information just today that my fuel pressure...
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    2003 Yukon xl low fuel pressure

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    2003 Yukon xl low fuel pressure

    I’m pre im pretty sure my gauge is accurate even though it is a harbor freight. I got a loaner fuel gauge kit from auto zone so I could check the pressure at the fuel filter. Both gauges read the same The car runs great, starts instantly, decent fuel mileage. This started with a lean code...
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    2003 Yukon xl low fuel pressure

    Sorry ltft Not in the last 12 years I have had it. I did the carb spray thing didn’t detect anything. I didn’t think that could cause low fuel pressure anyway. Thank you I will do that I have done so many things disconnecting the negative on the battery that maybe computer hasn’t setteled. How...
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    2003 Yukon xl low fuel pressure

    lol I’m a bit feeble minded myself. Sorry I can’t be not clear on fuel trims as they are always all over the place . I figured it was related to the low pressure. Interesting you mentioned throttle body because this all started a short time after I removed the throttle body with a po171 code...
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    2003 Yukon xl low fuel pressure

    Xl 1500 5.3 t vin. 11-14 hot idle short term always jumping around hard for me say -up to 6 jumps around a lot . I see a lot of plus 3 sometimes higher. Cruising can be a bit higher but will drop down into the - 10 fange. Thanks
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    2003 Yukon xl low fuel pressure

    5.3 gas
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    2003 Yukon xl low fuel pressure

    No detectable fuel leaks. I have had the car for 12 years . Has 215 miles. Starts instantly runs very good. I can reset fuel averages and get 13 the cararound town 16 freeway. Starting to think it ha run this way since I have had it. Fuel trims up and down probably average 11-14. Changed all...
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    2003 Yukon xl low fuel pressure

    It’s the 1500 gas. 2 fuel lines at the pump I don’t. Ltft can be in 11-14 occasionally a little higher at higher rpm then sometimes when driving when I slow down they can go down around 9. Thanks
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    2003 Yukon xl low fuel pressure

    Ltft are in the 12-14. New oxygen sensors no changes. Haven’t checked egr valve but will do. Looking into how to dead head the pump but I have tried 3 different pumps. Thank you for your reply.
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    2003 Yukon xl low fuel pressure

    Great reply. Thank you. My last fuel pump replacement was an auto zone Delphi 6 years later I warranty replaced it. No change in fuel pressure. Not wanting to risk it I tried another cheap pump (precision) I have done the fpr, new filter, maf, o2 sensors. Cleaned throttle, checked voltage at...
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    2003 Yukon xl low fuel pressure

    My 03 Yukon xl has low fuel pressure 48 koeo 48 running 42. I have tried everything . The vin is not flex fuel . It uses a fuel rail with the flex style regulator. It has a return at the pump. Everything I see for my year is a returnless pump with return line. I have managed to get a new...
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