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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Rough idle

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Old Feb 28, 2022 | 04:37 PM
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Biguns61's Avatar
Biguns61
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Rough idle

Hello folks. I'm in the process of having an older (1990) F350 restored. I'm NOT the Miyagi being the resto, just the lucky beneficiary. We (the shop) are having issues with the new ignition system I'm swapping in for the OE one. MSD coil/distributor is causing the engine to idle most unhappily. I should mention I've also.swapped out the OE intake for a ported, polished one from efi460guys.com. Any suggestions are welcomed, cheers, Anthony.
 
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Old Feb 28, 2022 | 04:39 PM
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SFaulken
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Check your grounds. The clean them. Then check them again, and Clean them, and then add a few extra.

MSD stuff is *very* ground sensitive, and you'll tear your hair out with it, if you don't give it *very* good grounding.
 
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