[Diy_efi] 928/749

Gregg Eshelman g_alan_e
Tue Aug 21 06:45:29 UTC 2007


--- Bill Shaw <b.shaw at comcast.net> wrote:

> Well,  a new coil helped some but didn't cure the
> problem.  It will 
> start and run now but is still dropping spark
> intermittently in a couple 
> of cylinders.  The pulses from the ignition module
> to fire the coil are 
> nice and steady,  don't miss a beat.  Using the
> timing light on a couple 
> of the plug wires shows erratic firing. It's
> starting to look like 
> something in the distributor now,  but I can't
> imagine what.

How many miles on the car? Could be worn bearings or
bushings in the distributor or a worn shaft or
possibly even the drive gear.

With the cap and rotor off, you shouldn't be able to
move the shaft up and down or rotate it more than a
tiny amount. Try wobbling it sideways too.


       
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