I'm stumped with a no start problem, Fuel injection strikes again Options

[brant]

Hi everyone,

sorry for basically posting the same problem I've been chasing for 3months...

1972 1.7 with Djet

I've Done nearly everything... honestly.. tested and re-tested... This weekend I even changed the FI harness completely..... So I guess I'm going to start over from scratch and give it one more go around.

The good news is that my problem has gotten worse and now its to the point of not starting, so it should be easier to find than when it was intermittent.

The symptoms.
when the car is cold (or sits for 30 minutes) it will start and then run for 30-60 seconds. During this running time it is smooth, hitting on all cylinders, and sounds good....

However, after 30 seconds it dies and will not restart until it has sat for 30 minutes.

During the "dying" it shows spark at the timing light and Fuel Pressure on a guage... During its no start period, it continues to have spark at each plug wire, and continues to have 29.6psi of fuel pressure at the guage...

So I've got to think its FI related. I swear, I've tested everything except for the cold start sensor, and TPS....
but I guess I had better start over...

Is there something with this type of symptom I should check first?

I thought FI points, but have tried 3 sets yesterday to no avail. I also ohm tested the 25 pins on the ECU and they were all fine.

Is there something in the regulator board that would cause this problem, other than the power to the Fuel pump (since I have pressure still).

thanks everyone.
brant

[brant]

I promised myself I wouldn't say..."already tried that" and I would be open minded... but I think I've got the CHT covered.... my old one tested good, but I bought and installed a new one which also tested good...

doesn't seam rich when its not starting.. no fuel smell..
and 30 seconds of running doesn't hugely affect the reading on the CHT anyways... its readings are more effected by ambient (60F versus 95F) depending upon the temp on the day I'm working on it...

I HAVE NOT changed out the regulator board...
I thought it only controlled the fuel pump..
but since its about the only thing I haven't changed, It could well be affecting something else.....

SO... I will push/wiggle on it..
Does anyone have a spare they want to sell to me?

I switched the ECU once, but since then the symptom has changed.. I'll switch it again and have a spare of the same number....

Thanks everyone.... thanks a ton...
brant