Very strange mid range power loss
03-22-2007, 11:25 PM
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Very strange mid range power loss Automatic trans GTO with a 230/236 cam, stage 3 heads..
Got the AFR dailed in 13.0 across and a strange thing is happening...
the car pulls up to 5200 and falls on its face and stumbles...and strugles to get past 5200-5400. If we stay in the throttle, eventually around 5800 the power picks back up and starts pulling again.
Could this be valve float or what? The power curve is like so...
3800-5200 the power climbs as it should.
5200-5700 the power falls off nasty
5800+ it picks back up and the power can be seen climbing again up to 6800.
AFR is steady entire time and never goes lean...there is plenty of fuel.
Any ideas?
Got the AFR dailed in 13.0 across and a strange thing is happening...
the car pulls up to 5200 and falls on its face and stumbles...and strugles to get past 5200-5400. If we stay in the throttle, eventually around 5800 the power picks back up and starts pulling again.
Could this be valve float or what? The power curve is like so...
3800-5200 the power climbs as it should.
5200-5700 the power falls off nasty
5800+ it picks back up and the power can be seen climbing again up to 6800.
AFR is steady entire time and never goes lean...there is plenty of fuel.
Any ideas?
