912E engine miss @ 3500-4000rpm - Rennlist - Porsche Discussion Forums


912E engine miss @ 3500-4000rpm


Old 01-01-2017, 10:55 PM
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Default 912E engine miss @ 3500-4000rpm

912E w/ 102k miles. Couple of issues I need some Rennlist guidance on.

First, I'm somewhat mechanically, savvy, but not a Porsche tech, so I may need some layman explanations/guidance.

912E with recent valve adjustment, timing adjustment, new stock plugs, new plug wires, switch from points/condenser to Pertronix.

Hard to start at beginning of day. Seems like I have to crank it too many times/too long for car to start. Gets started, and settles into idle around 1k rpm, but jumps a little.

Next, when I get going, the engine seems to "miss" about 3.5-4k rpm...then continues to rev out ok. Oddly, it didn't do it every time I accelerated...probably 80% of time.

Any thoughts on remedies? Thank you for the help!


Last edited by BorsoniE; 01-01-2017 at 11:25 PM.
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Old 02-04-2017, 07:12 PM
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Location: St. Paul MN
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Had one for many years. Carb conversion or old fuel injection? I guess it doesn't matter as the engine is still a VW type 4 pancake. If you can find an old VW mechanic they'll fix you up quickly. Ask around. Those old VW guys are getting scarce.
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