Contour Enthusiasts Group Archives Forums General Troubleshooting any idea what is going on

ok i was driving down the interstate in fifth gear running about 80mph and my svt started to stall so i slowed down put in in fourth it started to stall again then i put it in third and my rpms would not raise abouve 2000rpm and it was running really bad like it was missing so i pulled over and it would not idel at a certain rpm it would fluctuate so i turned the car off took my superchip out and it still does it would any of you fellow CEGers know what is going on it has done this before and it did it today but it is not doing ot all the time just every now and then please help