4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Help with low rpm misfire

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Old

06-28-2008, 06:50 AM

#1

jazzhorn63

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Join Date: Jun 2008

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Help with low rpm misfire

My 98 GT has a slight misfire at around 1500 to 2000rpm. No problems during acceleration or idle. Once I get above 2000rpm it's fine. I replaced the plugs with new platunims and a set of Ford Racing wires. I also replaced the coils (MSD) and had a fuel injection service done. Diagnostic threw up no codes. The problem persists. Any help much appreciated.

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Old

06-28-2008, 10:59 AM

#2

blackstallion666

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Location: Cumberland County NJ

Posts: 1,369

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RE: Help with low rpm misfire

Could try cleaning the maf sensor, and then reseting the pcm by disconnecting the battery for about 5 minutes. And see how that does.

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06-29-2008, 04:00 AM

#3

Modular_Madness96

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Location: Illinois

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RE: Help with low rpm misfire

Coils most likely spec them out with a DVOM

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1989, 2007, 2009, 46, codes, f150, ford, low, misfire, misfiring, miss, mustang, no, rpm, rpms, slight, v6

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