Strange, Won't start Options

[Shredhead]

So my '74 2.0 FI has been running well. I do an oil change (warm), start it and run it for a short while, check oil, top it off. Next day I go to start it and it kicks a little but won't run. (IMG:style_emoticons/default/WTF.gif) I checked to see if I perhaps knocked a vacuum line off, but everything looks okay. Any ideas? Where is the best place to start diagnosis?

[BeatNavy]

I'm assuming (maybe I shouldn't) D-Jet since he said 74 2.0 FI. If fuel pump is running, then next step is to see if injectors are actually firing (is fuel getting to engine).

If you crank it repeatedly and can "smell" fuel, then it's probably either ignition-related or something else disconnected. Like Dave said, I would triple check the CHT connection and wire all the way to the ECU. A bad CHT or open circuit there will basically flood the engine preventing it from starting or only let it start briefly. Check the MPS connections as well.

If you don't smell fuel, then the easiest thing first would be to make sure your injector points aren't disconnected. Check the plug at the back of the distributor to make sure it's seated. If it is, then verify fuel is or is not getting delivered. You can remove an injector (leaving it still connected to the fuel rail) and put it in a jar. Crank the engine to see if fuel sprays into the jar. Or you can just pull a spark plug to see if it's wet or if there's at least evidence of fuel.

If problem not solved, then on to checking spark / ignition...