Bucking

[Pomorza]

Hey guys,

I drove the Z around today. In the morning all was good and dandy. Later this afternoon when it was nice it hot outside (100 actually) I drove down on the freeway to get back to my house. Everytime I let off the throttle it felt as if my car was braking (or being pushed back...er hesistating, I don't know the best way to describe it but it would literally feel as if I had hit the brakes or something had excessive drag). It does it in every gear it feels and I don't really know what it could be? Any ideas? If its a fuel issue I can fix that, but it just doesn't seem like that to me, it seem more of a mechanical type of drag. When I got home I checked all the rims of my car for heat, all four were rather hot to the touch but it is 100 here so I don't know if that changes anything.

Thanks

Jan

[AZ-240z]

Hey Jan,

I know nothing about the 280z, mine is a '71, but experience similar symptoms with my car. Turns out it was a spart issue with the dizzy. I have the stock distributor, and, after pulling off the cap, there is a white

plastic terminal assembly mounted on the top edge of the dizzy body. I had a pro chase down the problem, and it seems that this plastic terminal piece had cracked allowing a grounding or arcing causing a missing,

bucking of the engine. Sorry I can't be more informative, but, if you have a stock distributor, a spark, engine firing, issue is something to consider. Replaced this little plastic terminal and problem solved.

Good Luck

Dan

Just thought I would mention, since you live in Tucson where I grew up, there is a shop that knows Z cars and works on mine. The owner has worked on Zs for the last 40 years and is very good. The shop is "Micro Import

Service" in case you get stymied.

Edited June 3, 2012 by AZ-240z

[Pomorza]

Dan,

Thanks for all the help. I did indeed figure the problem out. The number 1 pison was not firing as the injector connector didn't work, cause an extreme lean condition at times and a rich one when it did actually fire. In short it confused the hell out of my fuel injection computer and lead to a myriad of issues. Thanks for the help though mate.

Jan

[AZ-240z]

Jan,

Glad to hear you found the problem.

Dan