I am having an issue with my STOCK 2004 Cobra.. I had it on the dyno last Friday to get a baseline and the dyno shows that it made 381HP at 366LBTQ max but on the upper end of the curve, there is a huge break up and the HP drops off rapidly at about 5800 RPM. Here's a shot of the dyno sheet!
DYNO #1 with Bosch Platnum +4 sparkplugs on 92 octane BP fuel.
DYNO #2 with new TR-6 sparkplugs on 92 octane BP fuel.
I've never had any one tune it, or work on it at all even though I bought it used I doubt it has ever been messed with! At first we thought it was some worn out spark plugs so I replaced them with brand new TR-6's and ran 3 more pulls which look smoother but still shows the anomaly! The computer says that it's commanding a huge amount of fuel at that specific RPM range and it does this consistently, I ran 6 pulls and they all came out about the same!
Below is a video of one of the last pulls!
[ame="http://www.youtube.com/watch?v=qFFJkq-Lvfk"]YouTube - Stock 04 Cobra dyno[/ame]
Anyone have any ideas? -Thanks!!
DYNO #1 with Bosch Platnum +4 sparkplugs on 92 octane BP fuel.
DYNO #2 with new TR-6 sparkplugs on 92 octane BP fuel.
I've never had any one tune it, or work on it at all even though I bought it used I doubt it has ever been messed with! At first we thought it was some worn out spark plugs so I replaced them with brand new TR-6's and ran 3 more pulls which look smoother but still shows the anomaly! The computer says that it's commanding a huge amount of fuel at that specific RPM range and it does this consistently, I ran 6 pulls and they all came out about the same!
Below is a video of one of the last pulls!
[ame="http://www.youtube.com/watch?v=qFFJkq-Lvfk"]YouTube - Stock 04 Cobra dyno[/ame]
Anyone have any ideas? -Thanks!!
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