suddenly a rough running engine

#41
Is your dizzy a factory one or has it been retro-fitted? Retro fit kits are only about $100 depending on the type. I was thinking about it last night and I may be wrong - maybe it is still a fuel starvation issue. Still, have you got a measurement that the sensor gap is supposed to be?
 
#42
Is your dizzy a factory one or has it been retro-fitted? Retro fit kits are only about $100 depending on the type. I was thinking about it last night and I may be wrong - maybe it is still a fuel starvation issue. Still, have you got a measurement that the sensor gap is supposed to be?
hi,
the dizzy is a standard 35D8, it is marked on the side near the vacuum thing.
I do not have any sensor gap information, it is just fixed mounted on its base plate, virtually no adjustment, gap looks
to be about 1 to 2 mm.
Peter
 
#44
I had my original distributor replaced as I knew they can be problematic for an electronic ignition distributor.

I purchased one from Performance Ignition in Melbourne. A very nice piece of kit but, as you say they are not cheap at around $800.

Also replaced all leads and coil to quality high performance items.
Car runs very well .

If it is the dizzy, it might be worth biting the bullet and shelling out the hard earned.
Good luck with it mate
 

sdibbers

Well-Known Member
#45
Just a thought on the bad fuel questions. You might want to use some known good fuel from your daily driver. Put some in a bottle with a tube attached to it and have the other end connected to the carb feed so gravity will feed the engine. Try starting it and see if she runs sweetly. If it does you have bad fuel, if it’s still the same it’s something else. After re-reading your reply I do agree the dissy sounds suspect. Have you tried pulling a plug lead to see how big a spark you get to the chassis?
 
#46
Yesterday the NRMA road service came to look at my sad old car.
2 men arrived, the young one was quickly on the job, the older one just stood there and did nothing.
He informed me that he knew about modern cars, fuel injection and the like, but would do his best with my old car :rolleyes:
He managed to get it started, checked the timing with my timing light , said it was running on 6 cylinders and could do no more, they left
after 20 mins. He did mention that he thought that the trouble was in the ignition.....
I contacted local auto electricians in town, I asked if I brought the dizzy and coil into them , could they test for faults, they said NO, they said that they could only test ignition system on the car. .:confused:

So as fault seems to be pointing to dizzy , thinking I should bite the bullet and go for a new electronic one ?
Peter
 
#48
Sounds like it. If you’ve already replaced the cap and rotor and you know the leads are good.
ordered a new dizzy from simonbbc.com will post the results when fitted, hope is does the job?:cool:
wanted to give business to Wins or Wadhams, but they both require units with exchange requirements, so out of the question when living on the
other side of the world , postage both ways would be over the top, so went with the one way solution, just buy it and have it mailed....:rolleyes:
Peter the dizzy...
 
Last edited:

sdibbers

Well-Known Member
#49
ordered a new dizzy from simonbbc.com will post the results when fitted, hope is does the job?:cool:
wanted to give business to Wins or Wadhams, but they both require units with exchange requirements, so out of the question when living on the
other side of the world , postage both ways would be over the top, so went with the one way solution, just buy it and have it mailed....:rolleyes:
Peter the dizzy...
Fingers crossed!
 
#50
electronic ignition tends to either work or fail with no spark at all. have changed my dizzy from electronic ( points replacement ) to full exchange electronic ( NEC show ) .diaphragm easily checked as per previous answer. comp test is always a good base starting point . then base timing number 1 cylinder . I would assume coil and condenser are ok? bear in mind if we change coil we have ballast resistor in car wiring . Power spark was used by me. had number. rough running .low power issues. rebuilt both carbs with new gaskets . air filters . fuel filters etc still rough when. v cold but gets better as it warms . ideal Ok with slight wandering on rpms ( surge ) around 500-600 . did find lot of. dirt on fuel being dragged up from tank. other than ongoing fuel vapour issues .. when hot engine and stopped for a while. managed to get engine to run well enough to start doing hour run outs around50-60 mph ( my top speeds in the old girl) . if we having what we think are electrical issues ? an old fashioned garage may be useful eg Sun diagnostic or Krypton testing . a these can easily check electrics for you. if all ok? that leaves fuel system. do check each carb ..I used the small lifting pin under each pot ..works as it should . good luck do let all know if you pinpoint a spotter may find a solution helpful.
 
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