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General Buick Tech / Running out of fuel at WOT
« on: September 06 2013, 05:11:29 PM »
Hi Guys,
Out of the blue I find myself seeing knock at WOT, in the past this has always told me it's time to replace the fuel pump. So 1st I replaced the filter with "Driveworks" fuel filter, as it was the only one in stock, still going lean in the gas. Checked the fuel pressure at the winshield while driving and had the 1 pound of fuel pressure for each pound of boost, now scratching my head and figure, well only one more thing to do... So next drop the tank and put a new Walbro pump in that I had new since the big Walbro incident a few yrs ago, where you sent in your defective s/n pump and they sent you a new one, guess what still have issue. Running the SD chip and it's showing the chip is trying to add the max fuel, so strange. Any ideas what might be going on? Going to replace the fuel filter again with a Puralator, but don't think that's it... Was thinking maybe the fuel regulator? Not sure....
Chuck
Out of the blue I find myself seeing knock at WOT, in the past this has always told me it's time to replace the fuel pump. So 1st I replaced the filter with "Driveworks" fuel filter, as it was the only one in stock, still going lean in the gas. Checked the fuel pressure at the winshield while driving and had the 1 pound of fuel pressure for each pound of boost, now scratching my head and figure, well only one more thing to do... So next drop the tank and put a new Walbro pump in that I had new since the big Walbro incident a few yrs ago, where you sent in your defective s/n pump and they sent you a new one, guess what still have issue. Running the SD chip and it's showing the chip is trying to add the max fuel, so strange. Any ideas what might be going on? Going to replace the fuel filter again with a Puralator, but don't think that's it... Was thinking maybe the fuel regulator? Not sure....
Chuck