I had the EXACT same problem on my car, which isn't too odd considering they're almost identical in setup. If you call trick flow they'll say they recomment the against the use of their cams w/ automatics.
I'm not expert but from what I read it has something to do with the lobe seperation of the TFS 1, makes an automatic want to stall. Pretty much any cam other than stock will have this tendancy. A chip will fix multiple problems you're probably having. (Bad idle, bad gas mileage, sluggish down low) Am I right?
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96 Cobra - a bit too stock. 14.0 @ 101
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