Re: No spark 4ktq project

[Todd Phenneger <phen9461@uidaho.edu>]

Hmmm,
	sound like I need to go through and double check all my
connections.  Make sure everything is hooked up the way I TINK it should
be.  Of course, I could be thinking wrong.
	The only wire I added was the wire for the Fuel Pump cutoff.  I
didn't change anything.  I am using the 5kt Relay.  Number on top is like
a 211 or 411.  Dont know PN offhand.  	
	Anyhow, I'll check everything and report back on Saturday.
BTW, do MC and KH use the same relay??  Are the three unused pins ont he
KH used ont he MC harness.  
	Thanks

	Todd Phenneger
	1983 ur-q / black / getting a MC
	1984 4000 quattro / modified/ turbo conv almost done.
	1987 4000 quattro / Saphire Metallic Blue/ Girlfriend's
	1996 A6q / Volcano / Dads Car
   *****1985 5kt / PARTING OUT!

On Wed, 27 Oct 1999, Ti Kan wrote:

> > I think you might be right here.  Its probalby at the coil end.  If I have
> > the wires hooked up to the wrong side of the coil, could this d that???
> 
> Are you running the correct FP relay for the turbo engines?
> 
> I don't know how you got the thing wired up, but for the KH and MC turbo
> engines, the ECU controls both fuel and ignition, so the fuel pump
> relay does not have an explcit wire to the ignition coil.  The ECU itself
> "knows" when there is spark so it can control the entire operation of
> the FP relay.  Looking at the Bentley for the 5KT, it shows that the
> fuel pump relay has the following connections:
> 
> Contact	Use
> -----	-------------------------
> 48/30	+12V main (track 30 of fuse/relay panel, always on)
> 52/87	To fuel pump via a 15A fuse (also to control pressure regulator
> 		heater filament and cold start valve)
> 46/86	+12V switched (track 15 of fuse/relay panel, on when ignition is on)
> 47/T	To ECU pin 21
> 50/31	To ground (track 31 of fuse/relay panel) 
> 59/87A	To decel fuel cutoff valve, frequency valve, wastegate solenoid
> 		(contact 87A of ECU harness)
> 53	Unused on KH engine
> 51	Unused on KH engine
> 49	Unused on KH engine
> 
> The 46/86 and 47/1 contacts connect to the relay's coil, and is the
> control signal.  The 48/30 and 52/87 contacts are the relay "switch
> contacts" which are closed together when the fuel pump is to be
> activated.  The 59/87A contact appears to be used only on 85 and later
> cars.  The 84 KH engine appears to have the freq valve and wastegate
> solenoid wired to track 15 instead.
> 
> If your fuel pump runs as soon as you turn on the ignition, but the
> engine is not running, it means that pin 47/T is getting connected
> to ground rather than the control signal on the ECU.  perhaps the ECU
> is not properly wired itself.
> 
> -Ti
> 96 A4 2.8 quattro
> 84 5000S 2.1 turbo
> 80 4000 2.0
> -- 
>     ///  Ti Kan                Vorsprung durch Technik
>    ///   AMB Research Laboratories, Sunnyvale, CA. USA
>   ///    ti@amb.org
>  //////  http://metalab.unc.edu/tkan/
> ///
>