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Some simple questions..some obvious,some not.Quote:
Originally Posted by conjames
Is the distributer earthed properly?
And the coil? (seen them monted to rubber to stop rubbing:eek:)
What is the roter button like?
Are the contacts in the dizzy cap clean?
And is the pin contacting the button when fitted?
Compresion test can be done any time but as you hinted I wouldn't pull the head of till it's running.
Startya bastard should eliminate fuel from the picture when your sparks right.
Quote:
Originally Posted by conjames
nahh for a 7:1 engine thats been sitting around for a while that might have stiff rings thats plenty...
get it running, give it an oil change and drive it around for a week or 2 and see what it does then.
OK just a thought, forgive me if I offend. You said you aren't getting any spark at the plug....... Do you have the plug earthed when you are doing this test, if you just hold the plug and turn it over and it isn't earthed then you won't get a spark.
If the spark is getting as far as the lead then check the gaps on the plugs as sometimes they don't come ready gapped.
I honestly think it may be a fuel issue, maybe pour a little petrol in the carby and crank it over to see if that starts it or even a little down each cylinder just to be sure.
Good luck mate I am addicted to these cars now and once you get it running you'll get years of enjoyment.
A frustrating one, if you haven't tried another coil do it, because if it has a fault in the secondary it will spark in the open air, but when under compression can't develop the extra voltage to fire the plugs under load. Occasionally a coil will give a nice blue spark out in the open but refuse to fire a plug under compression. If the coil checks out OK then measure the voltage at the coil with the points open and then closed. There shouldn't be more than a volt or two difference if the primary circuit is OK. If a ballast coil is fitted it should give a better spark than a straight 12 volt one, but it will burn the points out quickly and will stuff the dielectric in the condenser very quickly. That's because a ballast coil is really rated at about 7 volts, and the voltages will exceed the rating of the condenser. Also don't assume that new means good with some of the rubbish that's around now. Check every component by substituting with one that works on something else.Good luck
Yes be very careful with a new coil, I thought I'd fit my old HZ coil to give a better spark on my series and like stormy said I blew the new condenser that I had just fitted. Sometimes I wish I didn't feel the need to fiddle just for the sake of working on her.Quote:
Originally Posted by Stormy
To make a suitable test plug that simulates the conditions in the combusion chamber grab a spare plugh cut the leg off of it and hose clamp it to a large clip.
on a series the rocker cover bolts are perfect to connect this to.
http://www.aulro.com/afvb/555722-post7.html
Thnks for the help so far people...To answer a couple...yes, There is a reasonable spark from the Coil lead to the Dizzy...but still a yellowy colour. I will have to check these earth connections...but just strange this is the problem as it was running...then just wouldn't go again....I will investigate some more and see what I can find. I can't believe the plugs are all stuffed, probably just my earth connection when i was testing them....Although stranger things have happened....