1988 F150 1/2 ton P/U 2WD 5.0L FI 8cyl

Earl Hudson

Asked by Jul 21, 2016 at 10:31 PM about the 1988 Ford F-150

Question type: Maintenance & Repair

I bought a 1988 F150 1/2 ton P/U 2WD 5.0L FI 8cyl This truck has been
sitting for 10 - 15 years, After doing a tune up, new map, o2, egr valve and
sensor, throttle position sensor, replacing front tank, cleaning back tank
and  fuel system components, it starts great. It idles wonderfully. When I
press the gas, it instantly begins to run rough.It doesn't stall out, but it runs
really rough. What could some of the causes be?

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