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Old 04-17-2013, 07:10 PM   #11
Scooby Newbie
Member#: 342317
Join Date: Jan 2013
Chapter/Region: RMIC
Location: Paonia, Colorado
1974 VW Campmobile-E


Using the old spark plug grounded on the intake while cranking trick, I got weak and sporadic spark.

Using a 12V LED I measured between positive lead of igniter connector and the other 2 "signal" leads. When ignition is on, these signal leads produce 7 or so volts (This seems weird). When I crank the engine my LED does not pulse in a rhythmic ignition timing sort of way. Its very slow to turn off and on and is quite irregular. If I crank for more than 5 seconds or so the LED goes out all together. This on both signal leads.

Battery is fine, starter cranks away at high speed. ( I have adapted a starter from a VW TDI.) I do get a CPS code consistently even though I just replaced that sensor. Popped timing belt cover to inspect "teeth" on cam and crank and they look fine.
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