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Author
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Topic: hesitation at WOT
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KCmustangboy
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Member # 1927
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posted
 
 
98 cobra, So whenever you go WOT, and put the motor under load, as in being at like 2000rpms in 5th gear and then flooring it. The car slowly accelerates which is normal, I should downshift... However I can feel a lot of hesitation in the motor, like it's missing a little. Anything help is great. Sorry guys I know these are mostly dumb questions but I am totally knew to the 4.6 platform and learning on the 4v I just got. It has the stock 1998 spark plug wires lol... hopefully changing them helps.
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03 Cobra... Factory long block, with Whipple and AED tune... 812rwhp 10.0s @ 140... almost there!
WWW.AEDHP.COM
Posts: 1691 | From: San Jose, CA | Registered: Oct 2002
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93 twintrbo
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Member # 10475
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posted
Do you have a check engine light on?
It sounds like you are describing a misfire condition. I believe your car uses two group coils? Anyhow, if it is only misfiring under load. It is most likely spark plug related or faulty ignition wires. The easiest thing to replace is the spark plugs. Make sure to not touch the porcelain and inspect it for carbon tracking. If you see carbon tracking, you may want to replace the wires. I always prefer to use OEM motorcraft ignition components, but other may do the job.
Lawrence
Posts: 42 | From: Nor Cal | Registered: Nov 2010
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KCmustangboy
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Member # 1927
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posted
quote:
Originally posted by 93 twintrbo:
Do you have a check engine light on?
It sounds like you are describing a misfire condition. I believe your car uses two group coils? Anyhow, if it is only misfiring under load. It is most likely spark plug related or faulty ignition wires. The easiest thing to replace is the spark plugs. Make sure to not touch the porcelain and inspect it for carbon tracking. If you see carbon tracking, you may want to replace the wires. I always prefer to use OEM motorcraft ignition components, but other may do the job.
Lawrence
Thanks, I'll do the plugs and wires and see if it clears up this weekend.
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03 Cobra... Factory long block, with Whipple and AED tune... 812rwhp 10.0s @ 140... almost there!
WWW.AEDHP.COM
Posts: 1691 | From: San Jose, CA | Registered: Oct 2002
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NonOpSlow2V
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Member # 6111
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posted
I had that problem on my 97, I did the plugs and wires and ran like new
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1997 Autumn Orange GT vert
1996 Mystic Cobra
2005 95ci Harley Road King
2011 F150 Raptor
Posts: 2139 | From: San Francisco | Registered: Oct 2005
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KCmustangboy
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Member # 1927
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posted
Plugs and Wires and all better.... still have my idle problem at 1800
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03 Cobra... Factory long block, with Whipple and AED tune... 812rwhp 10.0s @ 140... almost there!
WWW.AEDHP.COM
Posts: 1691 | From: San Jose, CA | Registered: Oct 2002
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NonOpSlow2V
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Member # 6111
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posted
Coil packs maybe...
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1997 Autumn Orange GT vert
1996 Mystic Cobra
2005 95ci Harley Road King
2011 F150 Raptor
Posts: 2139 | From: San Francisco | Registered: Oct 2005
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NonOpSlow2V
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Member # 6111
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posted
Disregard my post above....I thought u still had the initial problem...vacuum maybe?
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1997 Autumn Orange GT vert
1996 Mystic Cobra
2005 95ci Harley Road King
2011 F150 Raptor
Posts: 2139 | From: San Francisco | Registered: Oct 2005
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