[A26B]

Originally Posted by Vette73

I replaced my pumps about 1,000 miles ago...Car has 51,000 miles.....Reason I replaced them in the first place was a mistake on my part.....Car ran great up until temp reached about 170 ..Car would hesitate until about 3,000 rpm than it would be fine.....

I thought it was the pumps....Wound up being a sensor on the passenger side near the header.....

That would be the O2 Sensor shorted out. At temp below "about 170F" and above "about 3000rpm, engine management is in open loop and ignores O2 sensor signal.