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Fixing Ignition Timing of my Sunny 120Y (DIY)

I’ve got this Nissan Sunny 120y 1974 (also knows as Datsun 120y).  Few months back we converted it from Conventional Point Ignition System to Electronic Ignition System.  We bought Electronic Distributor of another sunny for 1500 Rs from Bilal Gunj, but it cant be fitted with A12 engine, so all system from new distributor needed to be swapped in old one and was nicely done by Lathe Machine Operator.  Mechanic fitted it and said everything was fine.

But the problem was, car had poor acceleration, low fuel average and difficulty in starting.  We went to mechanic again and said everything is fine with ignition timing but Engine needed to be overhauled.  we knew that engine was fine and problem was with ignition timing and mechanic is illiterate and he know nothing about technical details. So we came back did some research on Internet and decided to fix it ourself.

We diagnosed that distributor was set to full advanced and yet timings were retarded.  In order to fix it distributor needed to be taken out, adjust the position of crank pulley and timing plate. Install distributor again.

Sources:

• Datsun Owners manual
• Datsun 1200 Wiki Ingition Timing
• Datsun 1200 Wiki Installing Distributor

Results:

After fixing ignition timing Car starts on First Self even in winter when engine is cold.  Acceleration is much better

P.S. Do not try this at Home

Posted by Faizan on: November 27th, 2009 | Posted in: Do it Yourself