Thread: Fintail Tune Up
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Old 09-20-2015, 08:56 PM
joshhol joshhol is offline
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Join Date: Nov 2002
Location: Flyover State
Posts: 1,364
Fintail Tune Up

I'm trying to troubleshoot some hard starting with my fin and have found the following so far:

1. The resistance on the plug wires was measured with the multi-meter set to 20K resistance.
Cylinder#
1: 5.11
5: 1.24
3: 1.29
6: 1.5
2: 1.27
4: 1.31
Coil Wire: 8.55

Jumped plug 1 and then 2 to ground from the plug wire to metal, cranked the engine and by my perception observed that #1 spark seemed a lot weaker than 2.
Removed the air cleaner and pushed the throttle linkage and observed strong fuel flow from the accelerator pump of the firewall side carb only (which appears to be normal). Car runs great once started, plenty of power though I don't have an experienced enough ear to detect slight miss, although there is very slight inconsistency to the idle.

I purchased a timing light and having been a diesel head all my life, took my first ever timing readings. Attached to plug wire #1, the reading on the balancer seemed to read 1.5 ATDC. If I'm reading the markings right, they look like 1, 2, 3, 40. Does each digit on the balancer indicate a factor of 1 or 10? I don't suppose the car could run at 15 ATDC!?
The spec is 2 ATDC if I recall. Any reason to advance it .5 degrees? 93 octane is used.

Questions:
Does the data indicate abnormal resistance in plug wire 1?
Is the coil wire reading within normal limits?


Thanks for the replies. I plan to replace the points, cap & rotor at the very least.
__________________
63 220S W111
76 300D W115
2013 VW JSW TDI M6

previously-
73 280 SEL 4.5
86 300E 5 speed
2010 VW Jetta TDI M6

Last edited by joshhol; 09-21-2015 at 06:12 PM.
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