carby problems

[kunbarrie]

i replaced the inlet manifold on the 85 model 5ltr v8 chev,it was corroded through,i used a later version that was EGR equiped,as i couldnt find a original type[auto choke was the external heated spring type]also replaced the carby with a later version with electric choke,now the fun part,hard to start[good fuel flow from pump plungers]float level 5/16 inch,when it does start cuts out ,maybe 4 more attempts and will idle,surges up and down,put hand over top of carby idle evens out,half throttle cuts out,has new pump,[1/2 ltr in 10 seconds fuel flow,8 lb pressure at cranking speed,new lines and filter,i dont think the manifold and carby marry together any thoughts,thanks

 

[Bt Doctur]

and down,put hand over top of carby idle evens out,half
That right there tells you its running too lean. Either an air leak at the manifold carb bolts , wrong gasket or the carb needs a good cleaning