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Old 08-27-2013, 09:01 PM   #1
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spark plug gap

Can the incorrect spark plug gap make the engine misfire? I just replaced my 96 gt plugs and wires with autolight platinums and I assumed they were gapped from the factory. All of the plugs are getting spark so the coils are fine.
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Old 08-27-2013, 09:07 PM   #2
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Yes it can. Pull them and check what the gap is at, it should be .054"-.056"
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Old 08-27-2013, 09:19 PM   #3
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Do these plugs normally come pre gapped from the factory?
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Old 08-27-2013, 09:22 PM   #4
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Quote:
Originally Posted by JDF View Post
Yes it can. Pull them and check what the gap is at, it should be .054"-.056"
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---------- Post added at 10:22 PM ---------- Previous post was at 10:20 PM ----------

Quote:
Originally Posted by Onlyoneromeo View Post
Do these plugs normally come pre gapped from the factory?
Not specificly for a vehicle. I'm only aware of some Bosch Platnum plugs that don't need to he gapped. But best bet is to run Motorcraft or Autolite coppers, and gap them like mentioned above. I should add the ones you got should be fine as long as you gap them too.
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Old 08-27-2013, 09:53 PM   #5
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Quote:
Originally Posted by Onlyoneromeo View Post
Can the incorrect spark plug gap make the engine misfire? I just replaced my 96 gt plugs and wires with autolight platinums and I assumed they were gapped from the factory. All of the plugs are getting spark so the coils are fine.
In addition to the plug suggestions received, check your new plug wires for proper connection into the distributor cap. I had a defective plug wire years ago that wasn't connecting solidly in the cap. Caused serious misfire, and burned up the rotor.
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Old 08-27-2013, 10:03 PM   #6
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Thanx for the tips guys. This is for the 96 gt so theres no dist cap but ill double check everything in case.
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Old 08-27-2013, 10:07 PM   #7
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Thanx for the tips guys. This is for the 96 gt so theres no dist cap but ill double check everything in case.
Nope. Just coil packs.
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Old 08-28-2013, 02:42 PM   #8
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Ok guys. All seems to be better now. I re gapped the plugs to spec. Thank god because they were all over the place! I read the codes and i had 3 misfires in cyls 1,4 and 8. I cleared them so lets see if they come back.
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Old 08-28-2013, 02:50 PM   #9
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Ok guys. All seems to be better now. I re gapped the plugs to spec. Thank god because they were all over the place! I read the codes and i had 3 misfires in cyls 1,4 and 8. I cleared them so lets see if they come back.
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Old 08-28-2013, 02:51 PM   #10
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Now you know for next time! Lol
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