[T3] Intermittently running on two cylinders

[Daniel Nohejl]

My wife and I are currently battling this very issue on our '69 SB with stock FI. We're not running Pertronix though. Perhaps you should begin by verifying the ignition system?

For a while, we were running on #1, #2, and #4. When diagnosing #3, the connector for the ground wire snapped off. The wire was brittle and though I didn't see it prior to breaking, it could have been that the connection was so bad that #3 wasn't firing. After replacing the ground connector, #3 works. 

After that, we lost #2 but haven't had a chance to replace the connectors there or do other diagnosis yet. 

I'm no expert, but I'd check the ignition system and the injector ground connectors. 


DN

On Dec 1, 2012, at 2:46 PM, Jacob Adam Schroeder wrote:

> My car has developed an issue lately where occasionally it will feel like
> it is running on two cylinders.  When it does this, I can pull the wires
> from the fuel injectors on cylinders 2 and 4 and notice no difference in
> the sound of the engine.  If I pull 1 or 3, I hear the RPM decrease and it
> sounds like it is running on only 1 (if that is even possible).  It is a
> 1972 Squareback with stock FI (except for Pertronix electronic ignition --
> which I plan to return to the stock set up soon).
> 
> It does not do this all the time.  In fact, two weeks ago, the car ran well
> enough (firing on all 4) that I took it the 22 miles each way to/from work
> (some of which was highway driving) while my 2012 Golf was in the shop
> (don't get me started on that).  I thought the problem must have "worked
> itself out" after that, only to find the problem again this morning.
> 
> I'm looking for ideas as to where to start troubleshoot this or if anybody
> else has experience a similar issue.  Thanks in advance,
> 
> Jacob
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