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Damn car still wont f***ing start!!!!!!!
https://forums.tipec.net/viewtopic.php?f=25&t=5896		 Page 1 of 3
Author:  iputthebootin [ Wed Sep 09, 2009 3:36 pm ]
Post subject:  Damn car still wont f***ing start!!!!!!!
Been having issues with my 85 lux now for a few weeks. Ran fine for a while but then one day just wouldnt start after running fine all day.
Left it for a day or two then it started fine. Stopped at the garage and it wouldnt start again. Ended up having to get the AA out who also couldnt get it going.
Ive done all the checks, swapped the DME relay, got fuel, initially had a spark but now have no spark, power to the coil, all fuses/relays are good.
There was no bounce at the tach so replaced the speed/ref sensor today and still it wont go.
Im starting to suspect the DME brain now.
Im losing patience with it as well now and im about to get the sledge hammer out and give it a good thrashing!!!!!!
:evil: :evil:
shaun
Author:  Gregson944 [ Wed Sep 09, 2009 6:10 pm ]
Post subject:  Re: Damn car still wont f***ing start!!!!!!!
Sounds like it could be the cam sensor.
Author:  tr7v8 [ Wed Sep 09, 2009 6:18 pm ]
Post subject:  Re: Damn car still wont f***ing start!!!!!!!
OK you have no spark yes/no? Does the tacho bounce now you changed the sensor? Is the voltage on the coil swinging as it turns over?
Have you checked for a spark on the output of the coil?

Are the injectors triggering? Is there fuel on the injector rail?
Author:  iputthebootin [ Wed Sep 09, 2009 6:41 pm ]
Post subject:  Re: Damn car still wont f***ing start!!!!!!!
Ok to clarify. There is no spark at the plugs and no spark at the coil end.
There is still no bounce at the tach.
There is fluctuating voltage at the coil when its turned over but deffo no spark.
There is fuel at the rail.
I have even tapped the DME brain as suggested on the clarks website with a mallet to see if it will fire intermittently but still no joy.
Its had new dizzy cap and rotar arm and new plugs that are gapped correctly.
Im runnin short of ideas and if i could lay my hands on a spare DME brain i could change that so i could at least rule it in or out.
Author:  Richy_S [ Wed Sep 09, 2009 7:02 pm ]
Post subject:  Re: Damn car still wont f***ing start!!!!!!!
If you have a switching voltage at the coil and no spark your problem must be the coil.

You should have a permanent 12v feed to one side of the coil and the other side will be a switched 0V. Put a dvm across the coil turn the car over and you should see 12v 0v 12v etc - if you have a good meter.

Rich
Author:  iputthebootin [ Wed Sep 09, 2009 7:21 pm ]
Post subject:  Re: Damn car still wont f***ing start!!!!!!!
But would that explain no bounce at the tach?
Author:  Richy_S [ Wed Sep 09, 2009 7:31 pm ]
Post subject:  Re: Damn car still wont f***ing start!!!!!!!
No it wouldnt.

Reading back you've changed the ref sensors - did you put them to the correct height? they must be a set distance from the flywheel.

Did you measure the coil voltage correctly?

Rich
Author:  iputthebootin [ Wed Sep 09, 2009 7:56 pm ]
Post subject:  Re: Damn car still wont f***ing start!!!!!!!
I changed the ref/speed sensors and i assume the height is correct as i slid them both out and left the original mounting brackets in place and the replacement sensors were like for like.
As for the coil voltage i went by the specs in the haynes manual.
Thats what makes me think its the DME brain as everything else adds up???????????/
Author:  J.J. [ Thu Sep 10, 2009 7:37 pm ]
Post subject:  Re: Damn car still wont f***ing start!!!!!!!
The sensors arn't always the same length. They will need setting up correctly. Read up clarks.
Author:  Daz85lux [ Fri Sep 11, 2009 10:16 am ]
Post subject:  Re: Damn car still wont f***ing start!!!!!!!
I have a DME and AFM in the for sale section for an early 944 :wink:
Author:  iputthebootin [ Fri Sep 11, 2009 4:53 pm ]
Post subject:  Re: Damn car still wont f***ing start!!!!!!!
Cheers daz, how much for just the DME and where in the midlands are you?
shaun
Author:  J.J. [ Fri Sep 11, 2009 7:38 pm ]
Post subject:  Re: Damn car still wont f***ing start!!!!!!!
Got a spare DME you can have for free. Just PM me your address.
Author:  deacs [ Sat Sep 12, 2009 6:33 pm ]
Post subject:  Re: Damn car still wont f***ing start!!!!!!!
im having the exact same issues on my 83 944! arghhhhhh
Author:  deacs [ Sat Sep 12, 2009 6:34 pm ]
Post subject:  Re: Damn car still wont f***ing start!!!!!!!
what and where are these reference sensors you talk of and what is the rev counter bounce all about?
Author:  RH944 [ Sun Sep 13, 2009 10:29 am ]
Post subject:  Re: Damn car still wont f***ing start!!!!!!!
deacs wrote:
what and where are these reference sensors you talk of and what is the rev counter bounce all about?


The flywheel sensors are at the back of the engine block. Low down on the passenger side. There are two of them held in by allen bolts. You have to lean in and get down just behind the oil filler to be able to remove them.
Mine's had the same problem before and I think is suffering again.
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