k when idling the new engine ildes fine just has exhaust leak....compression tested125 on all four....but as soon as i pulled into the highway to set rings...throttle body all the way open and gas floored....it does nothing but buck and cut out sometimes dieing. overheats going uphill cools down going down hill.

Help Please.

 

Any CEL's? double check the timming. Is this a stock ecu/injector setup? good luck

 

could timing be 180 backwards...but it fires up...just takes like 2-3 times turning the key over....p06 with uber and dsm450's....no cel

 

ehhh id check you plugs see what those look like. Is your car just running off a base map? It might just be the uber map is running your car too rich.

 

I am not being a smart *** at all but for the overheating it sounds like the coolant is low or you have an air bubble in the system.