docaam Posted December 23, 2014 Share Posted December 23, 2014 (edited) Hey guys not on a Z but on my skyline C10. Car came with L20A inline 6 with triple 40DCOE carbs, engine was working fine but fuel pump wasnt in a good shape This is how when it came from Japan Clean up the engine paint polish things like these and ran it was running fine still using same fuel pump without any regualtor, but I ran it outsdie the car After a 9-10 months installed in the car, didnt start it though Recently installed redline fuel pump for carbs Along with this regulator And here is it how it looks I removed the stock fuel rail as was looking for cleaner look and installed some pipes was planning to make a fuel rail but couldnt get appropriate size and AN fitting here we get only limited parts here in dubai so difficult to source. Anyhow manage to put IN and rerun and the problem I am getting is flooding in the carbs changed the settings on regulator but not working can cross check any fittings if pipes are fitted ok or not but whats happening is fuel is returning more and carbs are not getting it enough, as soon as we put the stock fuel rail it works and with these pipes it doesnt work Any suggestions would be appreciated. Edited December 23, 2014 by docaam Quote Link to comment Share on other sites More sharing options...
nix240z Posted December 23, 2014 Share Posted December 23, 2014 Does the Stock fuel rail have a smaller return line? looks like your new set up has the same size feed and return line. Hard to tell from the pictures. Quote Link to comment Share on other sites More sharing options...
docaam Posted December 23, 2014 Author Share Posted December 23, 2014 Does the Stock fuel rail have a smaller return line? looks like your new set up has the same size feed and return line. Hard to tell from the pictures. It's the same size till the cords member where stock pipes are there as from there return is smaller. Quote Link to comment Share on other sites More sharing options...
johnc Posted December 23, 2014 Share Posted December 23, 2014 Check the fuel pressure with a gauge. 3 to 4 psi. Quote Link to comment Share on other sites More sharing options...
docaam Posted December 24, 2014 Author Share Posted December 24, 2014 Check the fuel pressure with a gauge. 3 to 4 psi. Need to see don't have any gauge maybe then add a gauge somewhere in the line as well Quote Link to comment Share on other sites More sharing options...
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