5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Ignition Problem

Old 08-17-2007, 05:48 PM
  #1  
gearbanger
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Default Ignition Problem

every time i try to upgrade the ignition coil it misfires... i put the stock one back in it its gone... it does this with all brands.. i tried summit,MSD, and accels... and i cant figure out why it misfires with higher voltage ignition coils...
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Old 08-17-2007, 05:54 PM
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Default RE: Ignition Problem

have u tried checking ur wiring for the spark plugs?
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Old 08-17-2007, 05:58 PM
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Default RE: Ignition Problem

yea i have checked everything...even changed the cap rotor,new plugs,and wires.. and still does the same things... i would just keep the stock one but they would not give me my money back for the ignition coil just trade.. so i might aswell fix the problem i got and use the coil...
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Old 08-21-2007, 06:08 PM
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Default RE: Ignition Problem

TTT
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Old 08-21-2007, 08:16 PM
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Default RE: Ignition Problem

a what plug wires are on car and how old?
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Old 08-21-2007, 08:31 PM
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Default RE: Ignition Problem

i got summit wires they are about a 2 months old, and before the summit wires i had MSD wires and did the same problem..
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Old 08-21-2007, 08:35 PM
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Default RE: Ignition Problem

why in the world did you pull the MSD ones they are low resist and give more power to the plug....what is your plug gap? and what coil are you using?
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Old 08-21-2007, 09:03 PM
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Default RE: Ignition Problem

the msd ones where old and riped.. i thought that was the problem but it was not.. the gap is set at 50-52.... right now the stock one is on there.. it only misfires with high voltage coils..
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Old 08-22-2007, 01:04 AM
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Default RE: Ignition Problem

TTT...
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Old 08-22-2007, 01:18 AM
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Default RE: Ignition Problem

What Module are you using?
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