Hi Alexander,
 > My theory is that with the egr disabled, the engine
 > did not get choked down
 > on its own exhaust. Rather than a diluted mixture, it
 > was only running on a
 > fresh intake charge.
I still can't see how that made a difference. Even if the car was very 
long-legged (2.28 final drive ratio or so) and way under torque convertor 
stall speed the slight change in thottle position should not have done that 
unless that change resulted in the torque convertor going into lock-up. I 
forgot what knid of car you were talking about so I don't even know if this 
would apply.
Gerry
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