730 replies to this topic

[S pack]

The high energy spark from the electronic dizzy should easily handle a .060 plug gap

[claysummers]

Thanks Bruce and Dave. I was running NGK 5s previously. When I went for the dyno the tuner Davor advised me to put 6s in. Would have been 10,000km ago and no issue until recently.


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[claysummers]

Pretty sure I’ve found the problem
Inlet non-return valve failed.


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[S pack]

Good detective work to track that down Clay.

[claysummers]

The beauty of the old glass bowl pumps, I could see it was low. There were no apparent leaks or breakages when I took it off in the Main Street of Hahndorf Sunday morning. When I took it off again home in the shed all the fuel ran out the in pipe. Pretty obvious really. Anyway, fingers crossed as always.


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[claysummers]

Problems with ignition breakdown have continued to plague the 179 in my ute. Fuel system seems to be okay, as do cap and rotor. I fitted new NGK BP6EY (V notch) plugs, gapped to 0.040”. It appeared that the coil had failed, so I replaced it with a Bosch (made in China) HEI original style oil filled one, rated at 45kV.

I blocked off the vacuum advance and set the static advance to 9 degrees. Timing light shows 34 degrees at 3k rpm.

Intermittent flat spot down low continued and got worse, combining with pinging and backfiring and occasionally running backwards. Eventually it would not start and appeared to have no spark. After a rest it started and ran well enough to manoeuvre it out of the way and eventually in to the shed.

This morning I replaced the ignition module with a new genuine Bosch item, not forgetting to apply fresh silicon heat transfer grease. I went for a short run up a steep hill and all seems good. I will unblock the vacuum advance and do some more driving, before advancing the timing toward 14 degrees.

Early days, but now I am speculating that it was the module all along. It is not long since I got the distributor rebuilt by scorcher. The module I removed was the original Bosch factory item. I suspect they didn’t see anything wrong with it at the time as the problem was intermittent. I wonder if there is a simple method to test these. Early days, and still a chance of the problem reoccurring yet, but fingers crossed.


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