Why does your 1982 Nissan Z22 quit and not restart at idle following warm up?

Answer 1

If you mean that the vehicle will start but not idle after it's warmed up? and will die if allowed to idle.

No complete answer yet, but, I'm a tech with 44 years experience, and currently I'm working on a 1981 Datsun Pickup with the z22 engine, and ONE of the problems with this truck I'm working on is that it dies at idle after it's warmed up.


For this particular truck, and for things to look at with this problem, what I'm suspecting are one or more of the following:
1. choke set too lean (These engines run very lean to start with and as they age they get leaner.)
2. EGR valve stuck open. (Or other large vacuum leak.)
3. Idle circuit in the carb clogged up. (Carbs need to be cleaned/overhauled sometime after 150k miles, and I'm trying to avoid that overhaul in this truck since so many other things are pending or currently wrong.)
4. Idle shut off valve not opening. (This is called the Anti-Dieseling Solenoid, located right upper rear of carb body on this vehicle. It has one wire to it, which is hot when key is on, no voltage when key is off, which shuts off the idle circuit, preventing dieseling. and preventing idle if not working properly. and working fine on this truck.)
5. To meet emissions and so that they can run very lean, These engines use 8 spark plugs, two for each cyl, therefore the cap or rotor is prone to cause problems and cross firing. Best to use cap & rotor made in Japan to avoid this.
6. and since the vehicle has 2 coils, a complicated dist cap & rotor, it's often found to be wired incorrectly. However, the cap shows where each wire is supposed to go, printed right on the cap at each terminal. the only problem is the coils themselves are not marked intake or exhaust. But reversing the coils will not prevent the vehicle from running however, messing up the firing order will keep it from running.