[T3] Intermittently running on two cylinders

[Adriel Rowley]

Center of the engine by the A.A.R.. 

Think of electricity as a pipe. A supply is put in the pipe, and needs to go somewhere. If there is no ground, there is no flow. If a wire is broken, there is a leak in the pipe. The flow goes from the e.C.U. to the injector, through the injector, then ground. You can trace paths with an O.V.M. and a lot of the information is in the Idiot's Guide.


Hope this helps,
Adriel



-------------------------

1971 Sunroof Squareback with F.I.- Located in Coastal San Diego County
Student, A.S.U. Tempe, AZ


----------------------------------------
> From: jacob.schroeder at gmail.com
> Date: Sat, 1 Dec 2012 12:24:20 -0800
> To: type3 at vwtype3.org
> Subject: Re: [T3] Intermittently running on two cylinders
>
> Thank you, it looks like I need to focus on the FI grounds. Where are
> these located on a '72? Are you guys referring to the connector
> contacts themselves?
>
> Jacob
>
> Sent from my iPhone
>
> On Dec 1, 2012, at 12:06 PM, Mike Fisher <fisherfarms at gmail.com> wrote:
>
> > Use sandpaper on your pairs of FI grounds & add star washers for a better
> > connection.
> >
> > On Sat, Dec 1, 2012 at 11:54 AM, Daniel Nohejl <danielnohejl at gmail.com>wrote:
> >
> >> 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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> >
> > --
> > Eugene, Oregon
> >
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