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From: sherm@drune.UUCP (ShermanSP)
Newsgroups: net.auto
Subject: 280ZX Fuel Injection Question
Message-ID: <653@drune.UUCP>
Date: Mon, 28-Jan-85 12:43:26 EST
Article-I.D.: drune.653
Posted: Mon Jan 28 12:43:26 1985
Date-Received: Sat, 2-Feb-85 22:51:40 EST
Organization: AT&T Information Systems Laboratories, Denver
Lines: 48
Xref: seismo net.auto:5787




I am having an intermittent problem with my 280ZX's fuel 
injection system, and thought I'd go to then net for some
additional expertise/advice.

(For those not familiar with the Z's system, it is a 
 basic Bosch electronic fuel injection system; similar
 to the ones in Volvo's and the older VW's).

The problem is this:

Every so often the engine will idle very
poorly; barely making it at about 500 rpm, as opposed to the
usual 750-800 rpm.  The problem is definitely worse (i.e. more
frequent) during warm-ups in cold weather.  But it occassionally
happens after the engine is fully warmed-up.  Most of the time
when it's happening, it will go away at an engine temp of
about 130F.

I have the shop manual, and have tried/tested a variety of 
fuel system components.  Since it seems to be tied to
the warm-up period, I first suspected the "choke" circuit.
The air valve and auxilary fuel valve seem to be OK
though,  (although with an intermittent problem I may
just have been lucky/unlucky when I was testing them.)  Raising
the idle speed doesn't eliminate the problem.  The engine will 
still do its low speed thing every so often, just at a slightly
higher RPM (note not much higher rpm).

I am now at the point where (without more advice) I would probably
begin testing all of the fuel system components.  Since I don't 
really want to go on a wild goose chase,  and I REFUSE to go to
a garage, where they will replace components one by one til they
"luck" onto the problem, I am hoping that someone out there in
netland has had or heard of this problem before.

Please send advice, hints and/or guesses to the net or email.

Thanx in advance.



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