overlooked the obvious in trying to find my fuelling problem.My Pinto engine lays in the chassis inclined towards the front.The carbs across their width vary from the horizontal by approx 3/4".Removing the idle jets,cylinders 2 and 4 have obvious fuel and 1 and 3 do not.I cant alter the mounting of the engine so is there a manifold suitable for this or are we talking custom manifold if so who.Or again i am missing the obvious

Hi

I'm running twin 45 dcoe delortos,and my engine also is at an angle (lower at the front than the rear. my engine runs well and so I dont think that it is this that is causing the problem, but I stand to be proven wrong. If fuel is not getting through are you sure that the float neadle is not stuck in the shut position?

Ditch

adjustment of idle mixture is difficult 1/3 are lean and 2/4 rich/wet

In the dim and distant past I has a mini that I could never get the mixtures right on. It turned out that the spindle on the carb was worn and letting air in after the neadle, thus leaning the mix and this just got worse with revs.

just a thought

Ditch

I don't know what gradient that works out to be but surely if this was the problem then idling or driving up or down a step hill would make it more apparent?

If the problem happens in your garage, then raise the rear/front to see what difference that makes.

Have you checked the float levels are correct, needle vlaves sealing and your fuel delivery pressure is not too much?