87 F150 missing

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Jan 1, 2020 | 03:16 PM

JAH

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Joined: Jan 2020

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87 F150 missing

87 F150, 5.0, automatic, 73,000 miles
Idles fine, if driving 25-40mph it will miss after warmed up. 55mph and above runs fine.
Where do I start looking for the problem??

Jan 2, 2020 | 11:31 AM

Steve83

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Joined: Jan 2018

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From: Memphis, TN, Earth, Milky Way

The maintenance schedule in Haynes Ch.1; then the Troubleshooting chapter, just in front of Ch.1. Click this & read the caption:

(phone app link)

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