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Hard to won't start after warm up... S70 1998

uid 33936's pic
posted by  TheBrickTank on  Fri Nov 5 15:39 CST 2021
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last visit: Thu Oct 23 17:54 CST 2014
[RELATED]

KlausC,

One more update for the day.

So I've been isolating my time on the ECTS, and well the connectors from the ECM are just toast, and nasty and I've now cleaned them to the best of my ability, and here are the results of my labor.

The last test was as follow(s):
Took the car for another test drive, and when I got back I did the following:
At 0 time, I measured the resistance of the ECTS to be 255 Ohms.
At 15 mins past 0 time, I measured the resistance of the ECTS to be 350 Ohms, attempted to start car, and it started without hesitation.
At 30 mins past 0 time, I measured the resistance of the ECTS to be 512 Ohms, attempted to start car, and it started without hesitation.
At 45 mins past 0 time, I measured the resistance of the ECTS to be 720 Ohms, attempted to start car, and it started without hesitation.
At 60 mins past 0 time, I measured the resistance of the ECTS to be 933 Ohms, attempted to start car, and it started without hesitation.

I put the whole assembly back together after a long time off, started the car once more, and waited for it to get up to temp, at which point I shut it off, and waited 15 minutes. Then attempted to start it, and it started right up.

So either the ECTS is intermittent, or the connection was so nasty as to cause a higher than normal resistance back to the ECM. Either way, I ordered a new ECTS and thermostat and will replace both once they get here next week.

Hopefully there should be no more issues once this is done.

Let me know what you think.

Regards,

Matt
--
1989 - 245, 1990 - 245, 1991 - 245, and 1993 - 245






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