[urq] No start situation - suddenly

[qshipq at aol.com]

 Keith
Do you have tach signal?  It should hover on crank-over at around800rpm.  If it's flatlined at 0, I might suggest 2 things.  First,clean off the posts and connections at the coil.  Then ck to make surethe coil is good.  Second, while cranking turn the distributorplus/minus a quarter turn from tdc.  Make sure you have 12v feed to the coil from the ign switch.  After that you are into the more detailed diagnostics found in the urq service manuals.

The only other item I remember on this type symptom, was a bad ground trace to the ICU causing no ignition fire there. 

HTH

Scott J





Thanks for all the responses so far. Much appreciated.
I have started again - Just to confirm - There is fuel in the tank!!
All wiring from fuel pump relay to pump is fine - evidenced by results of
jumpering of the relay.
The jumpering also proved the feed from battery is intact and live, 
I understand the FPR shuts off if the engine stops turning - i.e. in a crash
- and so if there is no spark I guess the ECU prevents the FPR from
supplying power.

As I say above, I jumpered the relay and tried to start the car - nothing.I
removed plug #1 and tied it to the lifting hoop and turned the engine over -
definitely no spark.
I can confirm that the pump is actually moving fuel.
 
I have checked the timing marks - all cock-on.
Tomorrow I am going to check all the readings at the ECU connector.
Hopefully this might point the finger at something.
In the meantime - any suggestions welcomed.
Regards
Keith

 
> From: urq at pacbell.net
> To: urq at audifans.com
> Date: Thu, 8 Apr 2010 13:24:43 -0700
> Subject: Re: [urq] No start situation - suddenly
> 
> I wonder if we aren't going off in the wrong direction here ... the engine
> was running, now it is not and you know that there's no power to the ur-FP
> relay ... 
> 
> My recommendation would be to force your auxiliary relay to send power to
> the fuel pump and then see if it starts. It looks like you are referencing
> the US spec wiring diagram ... be really careful with that. We know that
> there are differences between the US and Euro Spec engines operate ...
most
> notably in the operation of the fuel pump relay. There also was a recall
in
> the US to remote the FP relay from the fuse box, was that done in Europe
as
> well? The FP Relay was remoted to eliminate some of the current load on
the
> fuse box. If your FP relay was still in the fusebox there may be damage on
> one of the power supply pins ... even though you now have eliminated this
> load, how long was the car powering the FP via the fusebox? 
> 
> I've seen other bits of misinformation in other response from this thread
> I'd like to comment on ... the urq is different from many other cars in
that
> the FP Relay control comes directly from the ECU, it is not triggered from
> the ignition coil. Therefore no spark will not necessarily guarantee no FP
> relay. Of course there may be a common cause that prevents both spark and
> FP Relay. 
> 
> I'd recommend that you force the fuel pump to run independent of the FP
> Relay in the fuse box and then see if the engine starts. If it does then
> you know that you need to track down the power in the fusebox and ur-FP
> Relay ... if it does not start you know the problem is somewhere other
than
> the FP Relay Power circuit and we can start figuring from there ... Hall
or
> crank sensors and such ... let us know what you find.
> 
> Steve Buchholz
> 
> -----Original Message-----
> 
>