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Old November 28th, 2019, 04:25 PM
sandro's Avatar
sandro sandro is offline

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Red face surging at partial throttle

hey guys,(and gals), I have a 91 F150 with a 5.0 EFI with 222K kms on it.
The engine surges when at part throttle...pulling away from a stop, or putting along slowly in a parking lot.
Any advice or suggestions would be appreciated.
Old November 29th, 2019, 12:59 AM
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glc glc is offline

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First thing I'd look for is vacuum leaks, then swap out the MAP sensor.

2003 F-150 XL RCSB 2wd 4.2 5 speed 3.55 LS
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harrison28 (December 2nd, 2019)

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partial , surging , throttle

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