From: Bob [bob@xistor.com]
Sent: Tuesday, August 22, 2000 10:09 PM
To: 928
Subject: [928] Re: Won't Start? How 'bout this..

Ok mine now solved "it'll crank but it won't start"
On particularly hot days my 86S would shut down without warning.
I checked the ignition (EZF) relay, the fuel pump relay and the injection
relays, although VERY hot they all function great. I suspected an overheated
fuel pump it checked out as well. I suspected the ingnition switch but it
seemed solid. Looking over the schematics I found an 'interupt' switch from
the alarm that appears just before the (EZF) ignition relay. When the alarm
trips (or fails due to heat exhaustion) the switch opens and the car dies.
The power to the alarm switch is connector B#23 (a thin black w/red stripe
wire) the return power shows up on connector F#25 ( a thick yellow wire).
bridge these two together and the alarm cannot kill you.

Bob C. 1986S (no more rubber bands on the EZF relay)

> Subject: Won't Start?  How 'bout this...
> From: WhipsawJim@aol.com
> Date: Mon, 21 Aug 2000 23:35:50 EDT
> X-Message-Number: 64
> 
> Seems there's a lot of "it'll crank but it won't start" problems going on out
> there lately.  I think my '78 takes the cake in this department.  Submitted
> for your consideration:




From: Wally Plumley [wplumley@bellsouth.net]
Sent: Friday, July 06, 2001 2:52 PM
To: 928
Subject: [928] Re: No start problem

At 10:55 PM 7/5/01, you wrote:

> > >        But then, the car started to get harder to start. Turns over, but
> > no varoom! So, I started to need to use a little gas pedal to get started.
> > > Then, it took two, then three sessions of turning the key, before it
>would start.
> > > It has stranded my wife once, and myself once, we both had to
>wait a half hour before it would fire off.
> > >  It has now been more than a week since it last started, and all
> > this week, I had not heard the fuel pump running. I got out to the car this
> > > morning, put the key into the ignition, and the pump was running, Glory
> > be!


Every car with a factory electric fuel pump has some kind of safety system. 
The fuel pump on the 928 will only run when the relay receives a signal 
from the ECU that the engine is running. The pump will also run for two 
seconds when you hit the starter.

Thus, the pump should not be running when the ignition switch is on. There 
should be a two-second burst each time that you hit the starter.

> > > So I twisted the key, and the car fired right up, no grinding away, no
> > > pedal. Lasted about a minute, there was an audible small -click-, and
>the
> > > engine flat died, no hesitation, no fade-out of fuel, nuthin'!

There are three relays that must be activated for the '87 to run:
Relay X (which is in position IV, not X - X is the name of the bus)
EZK Relay (position XVI)
Fuel Pump Relay (position XX)
LH-Jetronic Relay - (position XXV)

All of these relays are functionally identical, and interchangeable. More 
importantly, they are functionally interchangeable with:
Defroster Relay (position VIII)
Fan Relay (position X)
Starter Relay (position XIV)
Backup Lamp Relay (position XXII)

This allows you to swap relays on the road to get home, and also allows you 
to swap relays temporarily for trouble-shooting.

If the problem is not a relay, write again, again giving full details, and 
we will try to come up with some other ideas.

Wally Plumley
928 Specialists