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ignition problem
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Topic: ignition problem (Read 3246 times)
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dhla40
Senior Member
Posts: 189
ignition problem
«
on:
04 September, 2009, 05:49:25 PM »
Had a few ignition problems lately, the pertronix ignitor I fitted a few weeks ago started to fire erratically and could not be trusted so I fitted a spare points dizzy. The car ran ok for fifty miles but I could feel a slight misfire at light throttle and on removing the cap found that all four contacts had a small v groove in them presumably from spark erosion? I rechecked the rotor alignment at the static timing point and it looked close enough and the advance operated normally using strobe gun. I am sure the contacts were ok when I fitted the points dizzy which came off another car but looks the same as my old one. Has anyone had any cap contact burning issues before?
Sean
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1976 1.3s coupe
1973 1.3s coupe
1982 montecarlo project
1976 alfa GT
1981 alfa spider
angelorange
Megaposter
Posts: 324
Re: ignition problem
«
Reply #1 on:
08 September, 2009, 11:04:14 AM »
Cap no4 terminal to modified inlet manifold - had arc there but am running MSD6AL multi spark box through original set up.
Apparently, Cap (plastic) groves caused by arc can be fixed with nail varnish!
For a tenner you can get a new cap
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dhla40
Senior Member
Posts: 189
Re: ignition problem
«
Reply #2 on:
08 September, 2009, 05:36:02 PM »
I am talking about the internal contacts where the spark jumps from the rotor arm, have fitted an old cap and will monitor the situation.
Sean
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1976 1.3s coupe
1973 1.3s coupe
1982 montecarlo project
1976 alfa GT
1981 alfa spider
angelorange
Megaposter
Posts: 324
Re: ignition problem
«
Reply #3 on:
08 September, 2009, 09:26:42 PM »
Is cap a good fit?
A slight groove in each is not a big issue as long as they all wear the same.
Best.
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I'm entitled to my ignorance!
dhla40
Senior Member
Posts: 189
Re: ignition problem
«
Reply #4 on:
09 September, 2009, 10:29:11 AM »
It is a marelli cap but the contact erosion is all on the same side as if the rotor is too far away when the spark jumps but I have checked the alignment with the cap off and using a reference mark on the side of the dizzy and all seems to be in order. Just another one of those mysteries of Italian electrics I guess?
Sean
Logged
1976 1.3s coupe
1973 1.3s coupe
1982 montecarlo project
1976 alfa GT
1981 alfa spider
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