R129 1995 SL60 Throttle body nightmare!

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Still running on 4 cylinders!

Hi folks- still a nightmare with my SL60

Had the throttle body/loom rebuilt by Victor in the US but the problem is still there, now looking like also it's the Egas module and/or the ignition pack. Not getting any spark to four cylinders, not the coil as has been tested and changed just to make sure.

Looking for some help, info or actually some tested replacements.

Part numbers are Egas 1295450732

Ign/pack 1245450632

Many thanks

Justin
 
Just to clarify when you say the loom has been rebuilt, was this just the loom to the throttle body or the whole loom/engine wiring harness, as your car fits the dates for the main wiring loom to be made from biodegradable insulation which then brakes down causing it to short out and the most common area for it to degrade is under the engine covers housing the coil packs, and as one bank of coils on your car is down, then I would suggest a check of the engine wiring harness at this point.

Gently slit open the outer insulation/tape to expose the wires beneath....if its a powdery flaky nightmare then the whole engine wiring harness will need to be changed.
 
Hi and thanks Vlad

I will get the mechanic to check that but I do have a receipt for an engine loom done a few years ago but I only had the throttle body and it's loom done recently.
 
Was it a new engine harness/loom or just patch repairs to degraded parts of the original harness?
 
Unsure of this right now- the invoice is with the car at the mechanics so will investigate tomorrow and get back to you but from memory it said just engine loom or harness and a large bill...
 
What's pointing you to E-gas module ? This should not cause a bank of cylinders to die . Have u pulled codes again ? Btw, both part numbers you indicated are egas.
 
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Hi

It seems the engine loom is ok- I think it must have all been replaced as per the bill in the receipts with the car, but at any rate the wires are good so it points to the ignition pack. Also it is not one bank that is not firing but 2 cylinders on each bank- each coil fires 2 on each bank. Coil, has been checked and swapped but the coil is not the problem but the ignition pack. Dizzy cap, rotor checked too.

Problem is that this is an AMG and the part number 1245450632 also refers to a W124 chassis egas I believe...

Also read that the 0125458532 made by Siemens will work well as Renntech used them on their 6.0 engines.. all I know is that there are no AMG ones available!
 
Ok now I understand . I think you are referring to the ignition control module, also known as EZL , which connects to the coils . Weird that part number u gave comes up as Egas though, can u take photo and post here ? In any case if fault code N 1/2 (if I remember correctly) is coming up on scan then it's the EZL . And I'm afraid it won't be easy to find a used/second hand one since , as you say, yours is a 6.0 litre V8 . New one from the dealer is big money . Last I checked for 5.0 litre it was £2500!

A 5.0 litre EZL may work , which there are plenty on eBay, but won't be 100% , likely at high load. Check with Carl at W140.co.uk if he has one and ask if you can return it if doesn't work. He's a nice guy and amenable .
 
Siemens or Bosch will work (or at least liveable) as long as same displacement , 5.0 litre m119. And your're right 6.0 litre AMG EZL is NLA, so you'll have to live with what's available.
 
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If you have no joy with Mercedes parts then it might be worth starting from scratch with a stand alone ignition system such as the one offered by Microdynamics in the States.
Electromotive | Electromotive

Have a read of their application manuals for their direct ignition modules.
http://www.electromotive-inc.com/wp-content/uploads/2013/08/xdi_manual.pdf

http://www.electromotive-inc.com/wp-content/uploads/2013/08/XDI-2-Users-Guide.pdf

With a bit of luck they may have already have experience of a set up like yours. Maybe worth a quick E mail??

ps here's a detailed link to throttle body rewire https://web.archive.org/web/20060705205112/http://v12uberalles.com/throttle_actuator_rewire.htm
and MAF rewire

https://web.archive.org/web/20070503173121/http://v12uberalles.com/MAF_rewire.htm
 
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Thnaks Grober

I've got a unit on it's way from the US so we will see how that goes but if it still is a problem I may well have to go this route.
 
I've got a 5.0 one coming from the US. So we'll see if that works- I'm told it should just be down a bit on power but not a lot. It's all I could get- the 'normal' 6.0 is for the V12.

Is there no one who repairs these?
 
I've got a 5.0 one coming from the US. So we'll see if that works- I'm told it should just be down a bit on power but not a lot. It's all I could get- the 'normal' 6.0 is for the V12.

Is there no one who repairs these?

These guys in Germany claim they can rebuild them altho that particular unit is not listed ?:dk:
https://ecu.de/mercedes/zündschaltgerät-46/

SL60AMG Ignition Control Module

http://www.500eboard.com/forums/showthread.php?3411-FS-EZL-ignition-module-015-545-61-32

The thing that kills these units is the heatsink paste between the unit and the inner wing drying out- the unit then overheats. If you manage to get a replacement make sure you clean the wing mounting position back to clean metal and use a good quality heat sink compound when mounting your replacement.
 
I've got a 5.0 one coming from the US. So we'll see if that works- I'm told it should just be down a bit on power but not a lot. It's all I could get- the 'normal' 6.0 is for the V12.

Is there no one who repairs these?

These guys in Germany claim they can rebuild them altho that particular unit is not listed ?:dk:
https://ecu.de/mercedes/zündschaltgerät-46/

http://www.500eboard.com/forums/showthread.php?1260-SL60AMG-Ignition-Control-Module

http://www.500eboard.com/forums/showthread.php?3411-FS-EZL-ignition-module-015-545-61-32

The thing that kills these units is the heatsink paste between the unit and the inner wing drying out- the unit then overheats. If you manage to get a replacement make sure you clean the wing mounting position back to clean metal and use a good quality heat sink compound when mounting your replacement.
 
Thanks Grober but the links don't work

I take that back- they work now!

I'll maybe try to get the original fixed by them. I am sure that the thermal paste has gone on mine and cooked it- so much heat off the 6.0!
 
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Think I'll grab a few sachets from work and redo mine this weekend, just in case.
 
Lets take that back... it DOES fire on all eight... till it gets hot and then it also stops working! In other words I bought a dud!
 

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