[3535tonyh]

Hi All,
have come across a problem with my 70 XR7. When I turn the key she fires up but as soon as I release the key from the start position she shuts off. I have run a jump wire from the pos battery terminal to the pos coil terminal and she will run normally.
My question is do I look at the ignition barrel or the switch on top of the steering column to track the problem

Thanks

Tony

 

[TheRktmn]

This is a common symptom of a failed tachometer.
Try bypassing the tach - unplug it and put a jumper across the tach connector to complete the ignition circuit. If it runs you have a failed tach.

 

[cougar1]

I second the motion on the tach..

 

[7Eliminators]

Tach for sure.