Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 6/24/83; site eneevax.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!ihnp4!houxm!whuxlm!harpo!decvax!genrad!panda!talcott!harvard!seismo!umcp-cs!eneevax!rex
From: rex@eneevax.UUCP (Rex Root)
Newsgroups: net.auto
Subject: 280ZX Fuel Injection Question
Message-ID: <228@eneevax.UUCP>
Date: Wed, 30-Jan-85 19:56:55 EST
Article-I.D.: eneevax.228
Posted: Wed Jan 30 19:56:55 1985
Date-Received: Sat, 2-Feb-85 14:12:03 EST
Distribution: net
Organization: U of Maryland, EE Dept., College Park, MD
Lines: 34

The symptoms you discribe indicate one of two devices
not working properly:
                
     The water temperature sensor (which I would immediatly
     suspect, if the engine has ever overheated. (It may
     have suffered damage as a result of getting too hot)

     The air temperature sensor ... less likely.

     
I assume you have the DATSUN 280ZX manual .. It gives the
resistance (in ohms) of each of these devices for various
temps.       

Make sure all of the vacuum lines are intact and be sure
there is a good seal on the oil filler cap ... the engine
will not idle smoothly if there is a vacuum leak. The
crankcase and upper valve area MUST be at a vacuum.

If these checks fail I would suggest doing a swap of
the control unit from another ZX of the SAME year.
If it comes to that, be sure to disconnect the battery
before doing the transplant. 

You mentioned the Auxilary Fuel Valve .. better known
as the COLD START VALVE, (enrichening jet) ... This
is NOT the problem ... The cold start valve is ONLY
open during start-up. ie: when the key is in the
start position.

Keep me posted ... I'm still thinking.

						Rex