My 280 dies

[MC75Z]

about 4 months ago my 75 280 started to die occasionally. the first time it was on the freeway and it just suddenly died. as i coasted over to the right i put it in nuetral and it started right up. this continued on occasionally on or off the freeway. it always started right up. sometimes on the freeway if left in gear it would it would start on its own it seemed like it was out of gas but would happen immediatly with no sputering. it dies all of the time now . i have run a hot wire from the bat to the coil. but didn't help. i tried a different trans unit. not hearing the fuel pump operate every time when turned to on i unhooked the line before the filter and nothing came out when turned over. with the line hooked back up it started after about 20 seconds of cranking. any ideas. mc75z

[280z1975]

Does this happen on hot days? When it is warm there is a vapor lock issue with the car. (I had this problem the other day, but it has since stopped). Do searches for vapor lock and thermotime switch. You should get some of the information you need.

Others who know the EFI system well please feel free to chime in ...

Can someone post the link to the EFI system manual? I can't seem to find it at the moment (I lost all my book marks the other day )

[webdawg1]

Here ya go....That should get you going in the right direction....

http://www.72hours.net/~zcar/

webdawg1

[naviathan]

It sounds like your fuel pump is kicking the bucket. It will stop pumping randomly and eventually it will just stop all together.