Still working on the car, and I could with running the enhine without the big plastic plenum attached.

Problem is it starts then dies when disconnected!

Any idea? I really want to see whats going on under there which I cant with the big plenum attached!

What is it that you are wanting to see when it runs ?

Without the plenum, the engine probably wont be able to to detect air inlet pressure / air flow ... which it'll try and use for fuel injection amounts. V8 or else ...

There is a coolant pipe under there that I could do checking for a leak while running.

I guess I will put the plenum on, run it and then take off again to look for coolant.

Thanks for the advice