fuel hesitation problem - Forums at Modded Mustangs
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post #1 of 1 Old April 30th, 2010, 11:47 PM Thread Starter
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fuel hesitation problem

I have a 2003 NA saleen I just installed a walbro 255lph fuel pump. My car seems to hesitate under normal driving. It also stalls out when I neutral drift and when I let off the gas or put it in neutral the car jumps to a 22.0 air fuel reading on the wideband but once I give it gas it returns back down to normal numbers. I have the stock returnless style fuel setup. I heard that these pumps are designed for return style setups. Anyone have any clue what the problem could be I just replaced the spark plugs. Could it be a faulty pump? the air fuel is great though when the car is under full throttle so its getting sufficient fuel. Any ideas?
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