[gliding_serpent]

I am going to embark on a search tonight on the topic, but I figured I would post my progress. 1984 911 3.4l rebuilt engine to be started for first time for cam break in. Starts every time on a dime, no concerning engine noise, but only runs 1-2 seconds before stopping. As it fails, another kick with the starter buys it another 1-2 seconds. Subsequent starts are not difficult, suggesting that the issue is not one of too much fuel and flooding.

Details:

- 1984 usa car just rebuilt
- 3.4l, 9.8:1, 964 cams, single plug, 66mm throttle body (3mm larger), open airbox, ssi's, m&k 2:1
- no concerning engine noises during startup
- Steve wong ssi chip
- position #4 for fuel quality switch (as per SW, -2.79 ignition correction)
- Euro dme
- both dme and chip starts an 85 car when swapped
-Both flywheel sensors testing at expected 1000 ohms
-Tach working
-Fuel pump working, tested with manual bypass of dme
-Plugs making a spark
- new head temp sensor

That is what i know off the top of my head. I will begin to research further, but insights to help direct diagnosis would be appreciated