p600 on a 94 Silverado

I had a p600 installed in my truck back in Feb.It runs o.k. at normal speeds but when you go more than half way on the pedal it seems like the engine doesn't know what to do. It gets up to about 4,000 rpm and it stays there. It won't go up any higher or shift or anything.I explained it to the guy who installed it and all he could say was "I don't know. Call Procharger." Is there any body out there that has had this problem before? It's a '94 Silverado with a 5.7 liter v8. It's kind of hard to get ahold of procharger. Especially since they close at 2:00 p.m. pacific time. Someone help. Please.:violent:

What are your plugs gapped at?
What plugs are you using?
What is your fuel pressure getting up to?
How much boost is it making?

I will get you all this info in a couple of weeks. I am going to get boost and fuel pressure gauges installed hopefully by next week.Thanks for replying. I'll get back to you soon.