Question about 1991 Ford F150
Ahhh. you have one of the first verisions of fuel injection... check all your vacuum lines, had a 89 ford f-150 I-6 with a similar problem years back. did everything from change vieciel speed sensor to the oxygen sensor... it was a tiny leak in vacuum line... Good luck!!
Posted on Feb 24, 2012
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Posted on Jan 02, 2017
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