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Guys what do you think. . I know the original is 12 psi. But, my sled has a remaped mcx box for 14 psi?? Whatever that means. I bought this sled 1 month ago so I dont know alot about it. 12PSI is great but it was awesome @ 15-18PSI on 100LL...... This is what it has: -LC pistions -thick nik...

Actually it was only one plug every time. So I must have one weak coil.

In a older post I was having a issue with my sled missing during boost. Well it dosint miss anymore. I lowered the gap on my plugs to .018 from the stock gap. At the same time I had the fuel pressure guage on and it ran 40-50 psi. Im running at 12 psi and it revs at 10500, runs great...

This is weird, I think it was the gap on the plugs. I have it down to .018. It dosint miss anymore but will it effect anything being that low?

No, I am trying to eliminate a fuel pressure issue first. Then if that is not the issue I will to a boost leak. The pressure gauge is T'd in and ready for tomorows run. I will keep you posted.

Wow, thanks. I agree with you. Thanks. Tomorow I will take it out and boost it on the trails and see what the pressure is... yes we have snow here .

ok, so I just checked the fuel pressure at idle and its 43 psi. When it boost on the launch master its all over the place. 20 to 60 back and forth so fast u cant see the needle. Actually I am having a hard time making boost with the launch master. It will start to pop and make boost and then...

Just tried pressurizing the mcx box to 16 psi and it floods the engine. But my pressure goes down to 30 psi. idles at 40 psi. I will try to go for a rip and see if it really drops. If it does then I have pump issues.

If it was a valve I think Id hear it at idle or flutter at revs.... Not going there yet. Fuel pressure gauge is going on tonight.

Thanks, I will make a plug for leak downs. It runs great everywhere but full out. has 127 psi on all 4 and was running fine since the kit was installed in 07. It has JE pistons, nicked, balanced crank, Carrillo rods and no shim. I bought is last year like this. Now I am the one who gets to...