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Thread: WTB: 1992 E-GAS Control Unit 124-545-07-32

  1. #1
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    WTB: 1992 E-GAS Control Unit 124-545-07-32

    My mechanic tells me the control unit is causing my LHM.

    Anyone have a suggestion as to where to have it rebuilt of what alternatives I have for a used one?

    I cant seem to find one and was wondering if there is another part number that works for another 500 v8.

    Thanks,

    Steve

    Had a look inside - cant see any blown capacitors...
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    Last edited by DAS500; 07-14-2017 at 10:06 PM.

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    Re: 1992 E Gas Control Unit 1245450732

    Yes, this is well documented. Any LH unit from a 5-liter M119 will work, preferably from a W140 model of the same year is best. You can get used ones on eBay, or from folks here. Since your car is a 1992, you'd want to get one from a 1992 W140 model, which has WOT capability.

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    Re: 1992 E Gas Control Unit 1245450732

    Gerry is referring to the LH (fuel injection computer) module in his post above... but DSA500 needs an E-GAS module, which is the controller for the throttle body (ETA). Bad capacitors are not always visible, they can fail but still look fine externally. I don't know if replacing the caps is likely to fix the problem.

    DAS500, the E-GAS modules are NLA new. Beckmann will rebuild them for ~$1k if it's fixable. You can replace it with an E-GAS module from any 1992-1995 400E/E420, but it MUST be an E-GAS module, not T/LLR, this is clearly marked on the label. W140 E-GAS modules will work to fix the LHM, but you will lose cruise control function.


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    Re: 1992 E-GAS Control Unit 124-545-07-32

    My bad on mis-reading the post to think it was an LH computer rather than the E-GAS as indicated in the title. My first post of the morning and I didn't have my coffee yet. I saw the words "control unit" and my brain immediately thought "LH fuel injection control unit."

    Folks here do sell them from time to time.

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    Re: 1992 E-GAS Control Unit 124-545-07-32

    08-31-2014, 10:51 AM
    Eric, the other 4.2 LH Module that has WOT is 012-545-3032. I have it listed for sale, but pending sale now that I know my buddies 014-545-62 32 module does not have WOT. We thought because his cars is a 1992, that it would have WOT - obviously month code on module is very important.


    gsxr
    08-31-2014, 11:42 AM
    All 1992 (USA) models did have WOT enrichment. However there is no way to know if the module in the car, was the original it came with from the factory... 014-545-62 32 is from a 1993 USA model and likely dated after about Aug-1992.
    Thanks to you both....again!

    Had a look around (and saw some old post quoted above).

    GSXR - if I want the WOT, is the part number 012 545 3032 or is there another part number that will work?

    All the best,

    Steve

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    Re: 1992 E-GAS Control Unit 124-545-07-32

    Quote Originally Posted by DAS500 View Post
    GSXR - if I want the WOT, is the part number 012 545 3032 or is there another part number that will work?
    Steve, if your 1992 500E has the original LH module, it will have WOT enrichment. If the LH part number starts with 012- it definitely does, if it's 014- we'd need the full part number to say for sure. The part number mentioned above (012-545-3032) is for the 400E / 4.2L engine only.

    Again, the LH module will not affect limp mode... you need the E-GAS module to fix limping.


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    Re: WTB: 1992 E-GAS Control Unit 124-545-07-32

    Hey Gary,

    Have to think you get tired of answering the same questions over the years. Your first post on this subject I saw was in 2012 and have to think you've answered it before then!

    My mechanic said the error codes he got were to replace the "Control Unit" with the part number 124-545-07-32. When I looked on the internet, my understanding was that part number is for the E Gas Module. The link below is what I found.

    https://www.mbonlineparts.com/oem-pa...ule-1245454532

    My take right now is to get Beckmann to rebuild it, since I will keep my cruise control and from what you said it has WOT.

    Have I got it right Sir

    Have a great day!

    Steve

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    Re: WTB: 1992 E-GAS Control Unit 124-545-07-32

    That is correct, your part number is confirmed to be the E-GAS module. It shouldn't be too difficult to source a spare, and I'm sure someone here would have a spare they could/would sell, to save some money over a rebuild. But, perhaps you just go to the rebuilt route (which should have a warranty) and be done with it.

    Don't confuse the E-GAS module (which controls the motion of the ETA, or throttle body, including cruise control function) with the LH (fuel injection computer) unit, which controls fuel flow via pre-programmed curves. The LH unit is what has the WOT (wide-open throttle) enrichment, which was native to US-spec 1992 model year cars only. The ETA+E-GAS has nothing to do with with WOT.

    See attached image from the EPC that shows the separate E-GAS and LH computers.

    I hope your mechanic is correct.

    Cheers,
    Gerry
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    Re: WTB: 1992 E-GAS Control Unit 124-545-07-32

    [QUOTE=DAS500;146771] My mechanic said the error codes he got were to replace the "Control Unit" with the part number 124-545-07-32. When I looked on the internet, my understanding was that part number is for the E Gas Module. The link below is what I found.

    https://www.mbonlineparts.com/oem-pa...ule-1245454532
    That is the correct replacement part, but it is NLA... if you placed an order, it would be cancelled. (Unless some random old stock appeared in a warehouse, which is unlikely.)


    Quote Originally Posted by DAS500 View Post
    My take right now is to get Beckmann to rebuild it, since I will keep my cruise control...
    This is worth a try but will likely cost ~$1000 and is not guaranteed to fix the problem, since your mechanic has not swapped modules to confirm 100% that a replacement E-GAS module will fix the LHM. That's an expensive gamble, IMO. You can get a good used 400E E-GAS module for under $100 to test with and that will work fine. Then you can decide if you want to plunk down $1k to repair the old one. Swapping modules is DIY, no mechanic required.


    Quote Originally Posted by DAS500 View Post
    ...and from what you said it has WOT.
    Just to clarify... the E-GAS module has nothing to do with WOT. That is a completely separate module (LH, not E-GAS). The WOT function is part of the fuel computer. The failure you are experiencing is with the throttle control, not fuel delivery.


  11. #10

    Re: WTB: 1992 E-GAS Control Unit 124-545-07-32

    I have an e-gas from a W140. Your would loose cruise control, but it would be a good test unit.

  12. #11

    Re: WTB: 1992 E-GAS Control Unit 124-545-07-32

    Gerry...Can I replace LH module 0145456332 in a car WITHOUT ASR with LH module 0125453032 from a car WITH ASR ?

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    Re: WTB: 1992 E-GAS Control Unit 124-545-07-32

    "I don't know if replacing the caps is likely to fix the problem"

    In my limited experience electronics, A failed capacitor will take out the transistor or tube next to it in the circuit.

    Diodes can leak w/age too.

    LH modules can switch between cars.
    for the E-gas- you must have an ASR 400e/500e module


    Michael

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    Re: WTB: 1992 E-GAS Control Unit 124-545-07-32

    Quote Originally Posted by Gmach View Post
    Gerry...Can I replace LH module 0145456332 in a car WITHOUT ASR with LH module 0125453032 from a car WITH ASR ?
    I'm not Gerry, but yes, you can swap LH modules around all you want (of the same displacement). Doesn't matter if the car has ASR or not. The numbers you mention above will give you a power gain at WOT for a 93-95 400E420.

    The ABS/ASR and E-GAS/T-LLR modules are specific to ASR or non-ASR cars, those cannot be interchanged.


  16. #14

    Re: WTB: 1992 E-GAS Control Unit 124-545-07-32

    OK...thanks

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