i recently installed a crane cams hi-6. Since I installed it I noticed a negligable mileage increased (also installed new o2 sensor). When I try to accelerate hard though I hit a wall at or before 7500 rpm.

I have the dials on the crane cams set to 0-1. Later today I will try the v6 option on the crane cams and maybe the 4 cyl - maybe that will help.

I also originally forgot to hook up my leading ignitor trigger and was able to rev higher. I suppose this means that I could have easily stuffed my catalytic converters, but I doubt so, even though I am hearing road/exhaust clatters now.

Any ideas or suggestions? I also guess it could be my alternator going out again, but i doubt that its load would prevent me from getting that high.

So any suggestions? anybody experience similiar issues?

 

shouldnt you already be set on the 4 cyl?

 

fc3s.org doesnt say so while fc3spro.com does say so. It is only supposed 2 change the multispark duration.

 

did you set the rev limit?...

 

Well, it got progressively worse and worse, on the way to an autocross i lost all power and couldnt maintain highway speed. It turns out my cat was clogged.