[T3] Need help with erratic no start/start condition

[Mark Fuhriman]

On Tue, Sep 27, 2011 at 11:58 AM, Norman Roush <naroush at sbcglobal.net> wrote:
> My daily driver '68 Squareback with MT and FI has recently developed an erratic no start condition.  Car will start and run fine for days/weeks.  Ran errand this AM.  Car started fine drove for about 20 mins.  Stopped for 15-20 mins and restarted fine and went home.  After 20-30 mins tried to start car but turned key, heard relays but fuel pump did not prime.  Checked relay, fuses and elect connections at pump.  All appeared OK but pump would not run.  Waited 30 mins while working on options, tried again, pumped primed OK and I drove to work.  I do not think I really "fixed" anything.  This sequence has happened 3 times in last 5-6 weeks.  I live in Sunnyvale, CA so heat/humidity is not a problem.  This has happened at 9:00 PM when it was cool.  Any suggestions?

--
"..fuel pump did not prime.."  meaning the pump didn't run?

Next time it starts, runs and drives fine find a place to pull off the
road and start playing with the wiring harness in the engine
compartment.  With the engine running wiggle the wires around the
large ECU "plug."  Wiggle all pieces of the harness, including the
wire that goes through the bulkhead for the pump.  You might find a
bad wire or connection that causes the engine to stop/start.  That's
how I once found a bad wire in my harness that caused symptoms similar
to yours.

Mark
'69 Fastback