hi dd, thank you for your response I got this pic. from this forum but I have the same carb I will upload a original one later. yes it's looks like DCZ 306 I couldn't see the id mark because didn't remove the sight glass.

I mean the one in front not the accelerate pump.

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Hi friends, Can someone explain what is this screw with spring is for?

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Thank you Sumith, yes may be I didn't do it my self. it's really headache.

A & B was connected to the resistor witch has rubber caps those wires are not long enough to the coil location, looks like original setup to the coil?

Thank you Sumith I am fine I have the same problem with Nissan Vanette A15 just after carb clean and tune up engine vibrate on idler I don't know how it comes suddenly after clean up.

thank you for your reply. so where should be the problem? in ignition switch or some where else? please check the attached pic. ABC get 12 or 13 voltage even if I disconnect terminal from ballast resistor and coil.

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Hi, sumith I remember you..! probably idler control valve.

Hi friends, this is a Nissan vanette van 1990 with A15 petrol engine ignition coil get very hot and stop the engine. check the voltage it shows 13.5 between ignition coil + wire to engine block while idling. check the ballast resistor it's fine but voltage not dropping on engine running. where should be the fault? advice is appreciated.

Actualy I downloaded DatsunSunnyB310WSManual.pdf I guss this would be alright. I tuned the engine today ignition and valve clearance no tapping sound only feel a little miss in slow idler. attached picture is Nissan Vanette c22 A15 engine cover open.

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