got new sparkplugs new fuel flter new wires new coild/rotor.. ran some injector cleaner thru it.. pulls REALLY strong untill 3000 im not shure i dont have a tach then it begins to miss and spits and no more power.. i know the inline six is not a high revving motor but it doesnt suppose to die like that does it?

 

Is this at full throttle only or does it hit this wall in neutral also?

 

full throttle in any gear but not in neutral

 

Replaced the air and fuel filter latety? How bout tune up is that in good shape?

It must seem like I'm not giving any answers but I don't have much to work with either, it's running out of fuel or spark either will cause what you describe. If it's been a while sence you have done these tune up items do them for good measure anyway. If you have tried these things, try shortening the gap on the spark plugs and see if it gets better.

Edit, sorry just reread your post if this started right after the tune up then definitely try shortening the plug gap.

 

Can't tell if you meant to say cap/ rotor or coil/rotor? I was going through this last week and it ended up being the coil.