The engine cuts out above 4,000 rpm when being pushed hard Options

[shag]

When the engine is just cruising along and I am in no hurry the car runs fine. When I have the accelerator floored and am taking the engine to the maximum rpm's it begins to cut out at approximately 4,000 rpm. This had happened twice before and I changed the fuel filter, which was extremely clogged, and that fixed the problem. This past winter I removed the fuel tank and had it cleaned out and coated with some kind of reddish substance that seemed great. When I replaced the fuel tank I installed a tubular screen about 4 inches long inside the tank, a new fuel filter between the fuel tank and the fuel pump and replaced the original fuel filter which is near the right rear wheel. I thought I had done more than enough to prevent this from happening again especially since I am preparing the car for Octeenerfest. Wrong again! The car started cutting out again at high rpm's just like before. This time I took the car to Derrick Sweger, who worked for Steve Lindell for many years and has rightfully inherited his business, though is not operating yet was kind enough to lend me a hand. He replace the filter near the rear wheel and then he started on the front filter. The filter on the front was a style that has the clear plastic body around the paper like insides and it looked like it did when I installed it. It was the fuel line that had a sharp bend in it that we thought was causing the problem. Derrick had a 90 degree piece of tubing that took care of the problem. He told me to call him with the results. Approximitely 3 miles down the road I floored the pedal and the exact same problem prevailed. So now I would like to certainly have this fixed before Octeenerfest. What do you guys think is the problem?