1991 Eb XR8 Not Starting, Backfiring out airbox, inlet manifold was full of water? Any suggestions on what to look for? Just changed inlet manifold gasket, and throttle body gasket! Should i change my valley cover gasket? I NEED HELLLLP PLZZZZ

When you say you did the inlet gasket, I think you might have actually just changed the plenum gasket, which is the gasket that goes between the two halves of the manifold. No water get's down there unless it's leaked in from the EGR valve, which is water cooled. To do the valley cover gasket, you will also do the manifold to cylinder head gaskets too.

Water in there, could be from the EGR plate, when you did the throttle body did you also remove the EGR plate & do the gasket behind it?

Cheers

ToranaGuy

Yeah that would be the gasket i done, No EGR gasket wasnt done i wasnt aware there was 1, I done the throttle body gasket,

Would EGR stop car from starting all together?

It shouldn't I don't think, but it is a big vacuum leak and coolant leak spot.

Cheers

ToranaGuy

The inlet manifold was full of WATER!??!!!?
If the EGR valve is jammed open it will indeed stop it from starting.