400bb struggle with backfiring [VIDEO]

[satellite400]

Hello! I have problems with my 400 in ma satellite 66. When i pull full throtthle it start backfiring and bog. Engine stops.

 

[pnora]

Sounds like its running out of fuel. Check the float levels and fuel pressure.

 

[RemCharger]

Yep, lean. Rebuild the carb

 

[Don Frelier]

Could be the fuel pump pushrod?

Seemed OK at first and got worse following a few throttle shots.

 

[satellite400]

Nothing wrong with pushrod, i have check. I have tried 3 different carbs and same problem.

 

[Billccm]

Intake manifold leaks?

 

[Don Frelier]

Maybe a broken valve spring?
It's a little rough but we don't know what cam is in it.

Could be a rotor phasing problem as well...

 

[RemCharger]

It sounds rough( at idle, not good). Comp test, timing check, idle/ revved up. And as mentioned vacuum leaks.
Is the pcv hooked up or plugged?

 

[RemCharger]

I'd look and see if the rear accelerator pump is working well

 

[Geoff 2]

If the dist is electronic, check the p/up gap for ALL cyls.