On the way home 7 miles total, my Z shut off going around 40mph two times> After coasting over to the side of the road it would immediatly start right up like there was no problem. Needless to say I can't get it to do this in my garage. Any ideas.... its almost like some gremlin turns the key off. Thanks for any replys.

The fuel pump would be a good place to start. Right before they fail it is not uncommon to get this type of sporadic operation. Do you have a pressure gauge that you can run some tests?

I have no tester, but I replaced the pump around 9 yrs ago. Would this also be the symptom of a bad fuel filter? Thanks

Do a search here for ECM issues.Could be a simple 10 minute solder job.I did a write-up last year on the same issue you're having.

http://www.classiczcars.com/forums/showthread.php?t=36903&highlight=ecm

Edited September 19, 201016 yr by Z train

Had a Maxima that did the same thing. Matchbook module on the distributor would heat up and shut down and by the time I'd coast into somewhere to check things out it have cooled off enough to work again. Much prefer the remote module set-up......

Turns out it was a bad fuel pump relay under the dash.

im having the same problem...where can i find the fuel pump relay? and what does it look like...thank you

im having the same problem...where can i find the fuel pump relay? and what does it look like...thank you

The OP's car is fuel injected. Yours, according to your profile, isn't. I'm sure you're not having the 'same' problem in that your car is shutting off, but the reason would not be the same.

Edited October 11, 201015 yr by sblake01

A corroded fusible link wire is another potential gremlin.