Sorry to dig this one back up, but I cannot get my Montero to run.

In addition to everything I have listed up top, I have also installed a fuel regulator for the Weber, a new coil, wires and plugs (already replaced the cap and rotor).

I changed the firing order (thanks again) and that solved the backfiring problem, but I still cannot get it to run more than 2 seconds. I have three friends that have all tried to time it without success either, so I am fairly confident I am not just messing it up (not positive though).

We try to start and the engine it almost immediately catches, and then chugs for about 2 seconds and dies. When it dies it sprays fuel and white vapor out the carburetor. Thinking the pump was pressuring up too much I disconnected the fuel pump and just tried to start it with what was in the bowl - the exact same symptoms.

I have messed with the air/fuel mixture with no change, messed with the choke with no change as well.

Any suggestions anyone? If I mess with something long enough I usually can figure it out, but this one is really starting to get to me.

The only thing that comes to mind is an intake valve sticking open and killing the engine? If it were timed correctly couldn't it at least start with a dead cylinder? I never messed with the head, but I spun it and made sure all the valves opened and closed... Could I have turned the camshaft timing gear around only 1/2 a turn? I don't know if that is possible - I lined the timing mark up with the chain, but if I recall the chain link and the timing mark were not correct when I tore it down.

Oh also, I know the "white vapor" is not coolant getting into the cylinders, there is no coolant in it yet (just swapped the intake).

Thank you for any help,
Ryan