'86 5000TQ no start...

[Bernard Littau]

Hi John,

You really, really, need to be able to pull the codes from the ECU.  The
Bentley covers this somewhat cryptically.  A better place to look is Scott
Mockery's web site:
http://www.sjmautotechnik.com/ecuf.html
is the page you need to pull codes.

There is also a page dealing with no start:
http://www.sjmautotechnik.com/nostart.html

No spark if the components are testing ok means the ECU cannot make sense of
the signals.  The ECU will throw a code in this case, so pulling the codes
is very important.  Your problem may be a simple as the alignment of the
distributor (the hall window) being out of range.

Good luck and keep us posted!

Bernard Littau
Woodinville, WA
'88 5ktq


> Hi all. I've been chasing ingition problems with my 5ktq for over
> a month now and its getting pretty frustrating. It seems to have
> been an intermitent problem, sometimes it will start and run
> fine, then a minute later it will be back to no spark. Until
> recently; I guess now it has made up its mind, past few days I've
> been solid with no spark. When going through the ignition testing
> in the Bentley I first tried the on board diagnostic to no avail,
> couldn't get the car to switch into diagnostic mode. I then went
> through testing every component thats covered in the ignition
> secion of the manual. When testing the hall sending unit
> everything came back ok, even the wiring tested good. The bentley
> suggested replacing the hall control unit, is this the same as
> the main ECU? I have already replaced the main ECU with one from
> Specialised German Recycling so I just ignored it and went to the
> next steps. I got to the coil and it suggested replacing the
> coil, so I did with a known good one, but still no spark. I've
> already replaced virtually everything, the hall sensor, the ecu,
> the coil, cap & rotor, both flywheel sensors and checked all
> wiring to be good, but still no spark. Any suggestions about
> where to go next?
> --
>