5ltreater

I'm not sure how to explain this, and i have posted something similar before but now its coming from a diff source. The weather is starting to get cold and when i let my car warm up and drive down the road vtec crosses over fine until about 7-8 1/2 it spasms in and out kind of like its hittin rev limitr...

Please help me, I checked oil level its fine, pressure is fine.... tranny is going to 3rd is gone 1st is going.... so basc whats goin on is cross over is fine but after that if feels like its going in and out.

eg with gsr, ctr cams, port polish, valve job ect......................................