[47silver]

Thank you for the advice, but my 1975 does not have an interlock with the fuel distributor the fuel pump starts when the key is in the on position. I think all 75's are like mine. The 75 FD's do not have any electrical connections.

And the reason that I have to make adjustments is that I had to replace the air box, etc. so had to remove the fd and so on and in the process believe i altered the sensor plate position, and during restart the cold start valve would not work and so the saga began.

luckily I found instructions in Haynes that explains how to set up the air sensor and adjust initial output to the fuel injectors.
The air sensor was out of calibration it would not fall to the leaf spring. I adjusted it by placing cigarette rolling papers on the outer edge and that is the amount of space required. it works very smoothly now.

Haynes said to adjust the idle mixture allen screw until the injectors barely work when the fuel pump operates and then back off 1/2 turn. That gives the initial setp

The engine starts and runs need to set mixture tomorrow.

The miss on my car was caused by a spark plug that was not getting a good ground. I tightened to 21 ft # and it works now on all 6 cylinders.