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Re: I988 F150 Runs bad under load after tuneup
Posted to Technical Discussion Forum on 1/23/2019 2 Replies

Yes Sir the dots are lined up. The timing is good. Unit runs ok at idle for most part. it mostly acts up when you put in gear. then won't rev over 1000 rpm and backfires and pops like crazy. Didn't do this till we performed tuneup. original complaint was poor ... Login to read more.

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