Help! Someone please! I have a Nikki Carburetor on my Nissan Z20 Twin Spark motor in my work van! My Mechanic has stuffed up all the plumbing after having the carby rebuilt. Now it won't idle. Does anyone know where I can find a schematic diagram of where the vacuum hoses should be connected to? My mechanic has dumped the car back at my place offering no solution but after tinkering with another mechanic mate of mine we can get it idling but need to know the correct plumbing of the vacuum as it only runs for a short time then cuts out. Hope someone can shed some light!

service manual should have all that info.

make sure the idle solenoid has +12v

always pays to check the basics

Any ideas where to find a service manual online? I have tried to get a service manual for it but the book store wants $249.00 for it. Too much money to spend on a book for such a small problem.

Its actually cuts out at any time, even when driving at 2000-3000 rpm. So its not only at idle. Do you think that it could still have some affect on it? It has vacuum hoses off every where and as soon as you block the wrong one it can all so cut the fuel supply. Any help appreciated!

Datsun 1200s didn't come with Nikki carburetors. Try asking on a Datsun truck forum like 620.com or nwde.org.

Manuals cost as little as $5. You don't need the factory manual, any Chilton, Clymer or Gregory manual has the information. Or try your local library for a free loan.

Also, carb rebuild kits come with full diagrams.

there are also vehicle speed sensors in some. i had problem that only showed up at 35-40 mph.

emissions carbs are a pain.