Fuel pressure?
#3
#4
On the '03 right? Return on the rail, test it. If it is too high get a tamper proof driver and crank that FPR until it says 58. Hell I see 56...55 sometimes. Mostly 58 at idle though.
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I work at an O'reilly that gets alot of commercial business, alot of them really are clueless when it comes to newer vehicles



