-By Eric B.
During the test drive of Ben’s 60 I noticed some hesitation when accelerating up to about 2000 RPMs. I figured it must just need a tune up and adjustment, nothing I couldn’t handle. Back at the shop, adjusted the timing, cleaned the carb and intake, adjusted mixture and idle, all that good stuff. The result was a better, but not good enough, still noticable hesitation.
Being this is a desmogged 2F, I figured it was desmogged incorrectly. After a few days of research and electrical and vacuum schematic reading, I found out a potential common problem among 60’s. I saw someone said to disconnect the tach wire off the igniton coil and it will fix the problem. Puzzled, I did just that and it did fix the problem. Great. But now the tach doesnt work and realized the air conditioning no longer works either. After no luck in finding out why this is, I went to the schematics.
The tach wire off the coil also goes to the air conditioning amplifier. This amplifier is what tells the compressor to turn on as the RPMs increase. The tach wire also goes to the emissions computer located behind the drivers kick panel. There is a speed sensor inside that uses this input. This emissions computer is what failed. After disconnecting the connector on the computer and reconnecting the tach wire on the coil, everything worked as before without the hesitation. The engine now runs great and pulls through the entire RPM range without a hickup.
Ben could replace this $95 part, but since it would be pointless due to his engine desmogged we’ll just leave as is. If you have this common hesitation problem on your 60, try this first instead of blindly spending money on new emission parts.
-Pics soon-
