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ECU compatibility; can a 511 be replaced with a 544 or a 554? 200

posted by  Boatbuilder on  Tue Aug 11 16:52 CST 2009
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last visit: Fri Apr 4 19:35 CST 2014
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My 88 240 had an ECU ending in 511 with a loose part rattling in it. I have access to ECU's from parts cars ending in 554 and 544, coming from cars in the range '86 to '88. Are these ECU's interchangable with the one I took out of my car? I haven't seen another 511 anywhere yet and am wondering if that was even the original, as it has some handwritten letters on it (salvage yard codes?). To follow that line of thinking, is it possible to figure out which ECU my car originally had using the vin number or other ID stickers on the car?








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    ECU compatibility; can a 511 be replaced with a 544 or a 554? 200

    posted by  pageda on  Wed Aug 12 09:38 CST 2009
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    last visit: Fri Oct 24 13:18 CST 2014
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    I believe the 554 was supposed to be in the 88 and is an updated 511/544 from earlier 85-87 LH 2.2.
    Dan







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    ECU compatibility; can a 511 be replaced with a 544 or a 554? 200

    posted by  porkface on  Wed Aug 12 08:52 CST 2009
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    last visit: Fri Oct 24 09:12 CST 2014
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    i know the 544 was oe in 85 and replaced by the 554 for a cold running problem. i think, but don't know, the 511 is 1 used on the 85 740s and replaced by the 554. good luck, chuck.







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