1.7 dies right after starting Options

[averagejoe71]

my 1.7 dies when it starts. Ill turn the key and it will shortly after stop and if i touch the pedal alittle within the small time frame it dies. Does anyone have any ideas of where to start checking to see whats the problem. All help is appreciated.

[BeatNavy]

That's your Auxiliary Air Valve (AAR) or sometimes called supplementary air valve. That lead is what warms it up so it will close after about 10 minutes of engine running. It is there to provide additional air the engine needs when cold (it is sort of a controlled vacuum leak that shuts itself off after roughly 10 minutes). If yours is disconnected your AAR isn't going to close (or at least not as fast as it normally would). That means you'll have a higher idle for longer than necessary. Given you're probably running too rich, that's probably somewhat off-setting the AAR not closing quickly (assuming the engine will run that long). Also, I believe if you ground that lead (hit it against something else) it's going to blow one of your fuses on the relay panel (IIRC) (and then your fuel pump won't run). I may be incorrect, but that's what I seem to recall. In any event, either hook that lead back up or don't let it ground with the car running.

The plugs look sooty. My guess is still too rich. I think the cold start valve is possible culprit (or one of them), but it's more likely CHT, MPS, or fuel pressure. Those just seem to fail most often and/or cause a rich condition that will actually kill the engine as it warms up.

You really should go here and read this site: https://members.rennlist.com/pbanders/djetparts.htm

[averagejoe71]

That's your Auxiliary Air Valve (AAR) or sometimes called supplementary air valve. That lead is what warms it up so it will close after about 10 minutes of engine running. It is there to provide additional air the engine needs when cold (it is sort of a controlled vacuum leak that shuts itself off after roughly 10 minutes). If yours is disconnected your AAR isn't going to close (or at least not as fast as it normally would). That means you'll have a higher idle for longer than necessary. Given you're probably running too rich, that's probably somewhat off-setting the AAR not closing quickly (assuming the engine will run that long). Also, I believe if you ground that lead (hit it against something else) it's going to blow one of your fuses on the relay panel (IIRC) (and then your fuel pump won't run). I may be incorrect, but that's what I seem to recall. In any event, either hook that lead back up or don't let it ground with the car running.

The plugs look sooty. My guess is still too rich. I think the cold start valve is possible culprit (or one of them), but it's more likely CHT, MPS, or fuel pressure. Those just seem to fail most often and/or cause a rich condition that will actually kill the engine as it warms up.

You really should go here and read this site: https://members.rennlist.com/pbanders/djetparts.htm

So the resistance on the CHT is at 1700 and the fuel pressure is 30 psi when cranking to when the car is on. Maybe my pertronix is bad?