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LH 2.4 cold start 200

posted by  rwvolvo on  Sat Jan 17 04:42 CST 2009
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last visit: Sat Sep 20 19:39 CST 2014
[RELATED]

To pick up on a previous cold start post:
I have been having a terrible time starting my 94 240 with the LH 2.4 system.
If the car sits overnight and the temp drops below 30 it will not start without a lot of cranking. Into the 20s and it will not start at all. Once started though it runs fine except for a somewhat high 1000rpm idle. If I get it started and warmed up there is not a problem with starting after that for most of the day.

Here is what I've done:
Checked codes - none
Replaced ECT - (this car has no cold start injector) I have run the ECT test according the FAQ and get these results with the new ECT- at ECU term 15 and 5 there is 3v @ 32degrees. 1.7k ohms ignition off, infinite ignition On. Testing from the sensor connector I get 2.7k and .7k from each of the terms with the ignition off, infinite with ignition on. I have run both the 951 and 561 ECUs with the same symptoms. Grounds at head check out. Am on on the right trail here thinking there is a wiring problem?





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