new 25hp rebuild runs rough

128vw · Posted: Mon Jul 06, 2009 2:03 pm Post subject: new 25hp rebuild runs rough

Just finished rebuilding the 25hp for the 53. Put it on the stand to test run it. Started fine seems to run strong, no smoke no noises. At idle it is rough so I started pulling plug wire, #2 is not as strong as the others. Did a compression test and got 95 in all 4, checked the valves, timing right on, the advance seems fine, swaped the plugs and the problem stays on #2. Any help?

Towel Rail · Posted: Mon Jul 06, 2009 3:12 pm Post subject:

Bad plug wire?
_________________
1974 Thing -- under the knife
1967 Beetle -- spring/summer/fall driver
1996 Subaru OBW (EJ22, 5-speed, AWD) -- winter car, 3-seasons "don't feel like biking today" car

049 > 070 > 053 > 009

overrestored · Samba Member Joined: December 24, 2005 Posts: 726

could be a distr. cap issue too. switch caps out to another cap.
broken or bent prong in the cap??? dirty???

128vw · Posted: Mon Jul 06, 2009 4:56 pm Post subject:

This was a new cap and wire set. I am going to replace the dist in the morning. Can I put in a 009 dist that I have just to check it out? Will it fit? Thanks

DDub · Posted: Mon Jul 06, 2009 6:34 pm Post subject:

Yes, and make sure you don't have a vacuum leak. Loose intake?


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