input needed for no start

[mysocal911]

Originally Posted by A horse with no name

Hi, I have the infamous no start issue. I have been reading numerous v good threads on what it could be to no avail.

When I re & re'd the rear suspension, I also replaced the fuel pump, DMT relay, O2, head, speed & reference sensors, including a Steve Wong chip. Since this time, I never made note as to which of the two plugs that the speed and reference sensors went into. I do know that the top one is for the head sensor
I does states that if it doesn't start to just reverse them. After doing this it still did not start.

I have no spark whatsoever at the plugs, and I also cannot smell any fuel. On the ECU #1 pin - coil - I get a 12.8 reading. When testing kohms for the speed and reference sensors, at the end of their connectors, I get 9889. When installing the reference sensor, I did glue a 0.8mm thick washer to set the space between it and the flywheel pin.

I have, for the time being, removed Steve's chip, and reinstalled the original one. It is installed correctly according to Steve's instructions. I did this with the thought that it may possibly make it a little easier for the ECU to sync.

The ECU looks as new. Very clean and shiny, and I could not see any cracked solder joints anywhere.

Prior to changing all of the above sensors, the car ran very well. Even after sitting for a long period it would start within just a couple of turns. The cap, rotor etc. only has about 1000 km -60K miles on them. The car has 126,000 km's - 78K miles.

Any and all thoughts will be greatly appreciated...Thanks in advance.

So again re-reading the initial post and correlating that to the "bad pin 34 of the ribbon connector",
one can potentially conclude that the OP when separating the circuit boards to install the chip damaged it.

With regard to the primary coil reading of 4.9 ohms, that's almost 10X what it should be and very
unlikely that the engine would start with such a coil. But given all the mis-steps in this thread,
that measurement was to be expected.

In summary, a simple missing DME relay (#86) input from the alarm module and a potentially
self-damaged DME ECU resulted in a lot of wasted time for all.

[mysocal911]

Originally Posted by A horse with no name

Ingo...I'm 'not so sorry' that I now don't have to send you my ECU to be refurbished

[/I]

??? But again, he did provide you with help. And there still maybe an intermittent element to the ECU.