I just got my I4 auto NA back from broken timing belt/waterpump/6 bent valves. They put new plugs/wires in the car as well. As i took it home i noticed a little miss in the engine at higher RPMs. Heres wahts exactly happening, as the car is at 3700 RPMs its missing and the tach is going down to about 2800 then back up and shifting at about 4500 or so. when i floor it is misses at 3700 and then at about 5300....any ideas on waht it could be thanks.

Might be your TPS since the rpm's are dropping. It might be a fuel problem too ( injectors,clogged filter,regulator). These are just some things I would check. Maybe someone else has had this problem and has a better idea.

bump