possible grounding issue

[spartanmisfit]

I've been having a bogging problem for some time now. I've done several things to fix it and, it just keeps showing back up. I finally took it to a great shop near me, (pauls high performance in Jackson mi) and got it dyno'd and I couoldnt get more than 280 hp and 310 ft lb tq. The owner of the shop said he thinks it's a grounding issue. So We grounded a few wires and that's when I got my best results, but it still bogged around 3,200 - redline. Sometimes it boggs worse than others, and it boggs alot less in first and second gear. Any ideas?

[4x4le]

Leads me to believe that you may have a boost leak possibly if its mostly doing it in the higher gears which create a higher load and typically rev slower. Check all your couplers, take them off, clean them and the pipes that they go on, spray them with hair spray and put them back on and tighten the clamps down.

I love the hair spray trick because it makes it slide on but helps keep it from sliding off.