1995 E420 now running on 4 Cylinders

[Pcl]

Hi Sir,
Last year I happily upgraded from a 90-300e to a non-ASR emerald green '95 e420, Upgraded harnesses, rebuilt transmission by MB MasterMech, been doing a rolling restoration (it still has the brick phone in the armrest that powers-up and beeps with the commercial airline factory phone functions between the visors). Last week I blew two fuses (5,6) that prevented the car from starting, after replacement of the fuses the the vehicle is only running on 4 cyl, D/S Distributor has no spark from the Coil, (which I replaced, today). suspect EZL. new and proper Bosch plugs, Bosch distributor and rotor, insulator. all to now avail. 10amp fuses in Can are good.
I've gambled and ordered a EZL through Ebay PN- 012 545 83 32 not sure if it is functioning or correct.
Car is sitting over night, with Neg battery disconnected and will attempt to reseat my modules.

I'm hoping that you still have an EZL available and would also like to have a LH module. It need not be WOT, though I wish it to be.

Thank you, and all others for the wealth of information.

 

[gsxr]

Hi Sir,
Last year I happily upgraded from a 90-300e to a non-ASR emerald green '95 e420, Upgraded harnesses, rebuilt transmission by MB MasterMech, been doing a rolling restoration (it still has the brick phone in the armrest that powers-up and beeps with the commercial airline factory phone functions between the visors). Last week I blew two fuses (5,6) that prevented the car from starting, after replacement of the fuses the the vehicle is only running on 4 cyl, D/S Distributor has no spark from the Coil, (which I replaced, today). suspect EZL. new and proper Bosch plugs, Bosch distributor and rotor, insulator. all to now avail. 10amp fuses in Can are good.
I've gambled and ordered a EZL through Ebay PN- 012 545 83 32 not sure if it is functioning or correct.
Car is sitting over night, with Neg battery disconnected and will attempt to reseat my modules.

I'm not positive if the EZL part number you bought will work properly in a 1995 E420. The 4.2L EZL's are not all interchangeable. It's worth a try though.

Have you swapped the wire from the D/S coil, and swapped the cap/rotor/etc from driver to passenger side?

Disconnecting the battery will not reset anything, and re-seating the modules won't do anything either (for ignition issues), just verify all modules are fully seated.

If you continue to have problems, post a new thread in the Diagnostics & Troubleshooting sub-forum. Very few people will find your post here in the classifieds.

 

[Pcl]

Thank you for that prompt reply!
"Have you swapped the wire from the D/S coil, and swapped the cap/rotor/etc from driver to passenger side"
I've replaced all with new parts.
After I solve this, I would still like to follow your example and have LH module and EZL on hand, at all times. in the trunk with my fuses, voltage reg., belt, baling wire and duct tape.
So if you have an LH and an EZL I certainly like prefer to purchase from you
I've copied my initial post to you to a new thread.
Thanks again

 

[sheward]

I have both an EZL and LH module for a non ASR car. Let me know if you are interested

drew

 

[Pcl]

I have both an EZL and LH module for a non ASR car. Let me know if you are interested

drew

Yes, I am.. and quickly please.. For an E420

 

[sheward]

EZL no. 013 545 63 32. This came from a 92 model $45.00 plus shipping

LH module no. 014 545 15 32 $150.00 plus shipping
also 021 545 70 32 the date code on this LH would indicate it came from a 95 model year. $75.00 plus shipping

Would someone in the know please verify if these units are proper for posters car? I believe them to be however I am not 100% certain.

edit; added pricing. I will also offer the ABS no. 010 545 98 32 (early) or 013 545 9432 (late) modules and T/LLR modules 124 545 3032 (early) or 124 545 3632 (late) as spares for $20.00 each.


drew

 

[gsxr]

LH # 014 545 15 32 is with WOT enrichment. This will give a power gain when installed in a 1993-95 400E/E420.

LH # 021 545 70 32 does not have WOT enrichment, but does have the updated program with ±32% adaptation range, for unusual locations where the engines reach the standard limit of approximately ±16%. This seems to mostly be confined to certain areas of Florida when a car would trigger a CEL with DM code #19 (LH at adaptation limit).

 

[sheward]

Thanks so much, Dave.

drew

 

[Kyiv]

The 4.2L EZL's are not all interchangeable. It's worth a try though.

How is that possible? I understand they night but be interchangeable between 1992 engine with lower and a 93-95 engines, but other then that?

Also, do you know/have you tried what will happen if 93-95 engine with a 92 LH module with WOT enrichment is fitted with a 92 EZL?

LH # 021 545 70 32 does not have WOT enrichment, but does have the updated program with ±32% adaptation range, for unusual locations where the engines reach the standard limit of approximately ±16%.

Roughly how many hours of engine work time does it take for LH module to fully adapt from default value?

Thanks!

 

[Pcl]

EZL no. 013 545 63 32. This came from a 92 model $45.00 plus shipping

LH module no. 014 545 15 32 $150.00 plus shipping
also 021 545 70 32 the date code on this LH would indicate it came from a 95 model year. $75.00 plus shipping

Would someone in the know please verify if these units are proper for posters car? I believe them to be however I am not 100% certain.

edit; added pricing. I will also offer the ABS no. 010 545 98 32 (early) or 013 545 9432 (late) modules and T/LLR modules 124 545 3032 (early) or 124 545 3632 (late) as spares for $20.00 each.


drew

How shall we do this? I would like to get Both LH's, the EZL, the late models of the ABS and T/LLR

 

[gsxr]

How is that possible? I understand they night but be interchangeable between 1992 engine with lower and a 93-95 engines, but other then that?

I really don't know! But the EPC shows distinct engine/VIN breaks for all 4.2L engines, while all 5.0L were straight supercessions. I've only owned 1994-95 E420's so I haven't been able to perform testing with earlier models.

Also, do you know/have you tried what will happen if 93-95 engine with a 92 LH module with WOT enrichment is fitted with a 92 EZL?

I *think* this combo will work OK, based on limited driveway testing. However, I have not yet installed this combination for a longer-term driving test. Note that I believe it will work fine on a 1993 with closed-deck block, but the question is how the same combo will work on a later open-deck block. Mine are all open-deck.

Roughly how many hours of engine work time does it take for LH module to fully adapt from default value?

It depends on the loads encountered during those hours. And, some modules seem to adapt faster than others (this may be part of the programming, but if so, I'm not sure if it's in the hardware or software). As a very very rough estimate I'd say with 5-10 hours of mixed driving that includes a number of WOT redline pulls, should usually be adequate. If you want to find out for sure, reset adaptation and then check it frequently with a digital scanner to view adaptation values.

 

[sheward]

How shall we do this? I would like to get Both LH's, the EZL, the late models of the ABS and T/LLR

Via personal conversation, which I see you have initiated.

drew

 

[northNH]

See post #12

WOT-Enrichment on 4.2L M119 - Pt. Numbers for LH Modules | Electrical, CAN and Wiring

Hi, was there a WOT enrichment on the E420 or not? We have this discussion around german Forums for years now and yesterday it started all over again. People claim it was only available in US since the 400E was introduced earlier into the US.... Howerver: Fact is in the WIS there is not a single...

www.500eboard.co

 

[Pcl]

For my 95 E420. Received and tested this EZL through EBAY. Appears to be from a '92 400sel. Firing on all 8 zylinders. Running great and smooth. Installed and performed mixed driving. Pulls great and shift points appear proper (but softer ?!?) Surprised of the looseness of nuts fastening previous and now defunct EZL. Thank you, everyone.
Special thanks to @sheward. Expecting package that that will allow to troubleshoot simpler, have WOT, and have spares to boot.
Btw, my paint code is dbc269 the metallic brilliant emerald

 

[Pcl]

Defunct EZL

 

[gerryvz]

My Bosch factory E500 EZL failed in a similar mode in January, 2009. Ran on four cylinders. Replacement EZL solves the issue.

From what I know and have heard, the Siemens EZLs fail much less than the Bosch units do. Also, it is less common to have a four cylinder EZL failure than it is to have the entire thing fail (no run).

Glad you solved it !!

 

[gsxr]

For my 95 E420. Received and tested this EZL through EBAY. Appears to be from a '92 400sel. Firing on all 8 zylinders. Running great and smooth. Installed and performed mixed driving. Pulls great and shift points appear proper (but softer ?!?) Surprised of the looseness of nuts fastening previous and now defunct EZL. Thank you, everyone.

Cool! Which LH module do you currently have installed with the 012- EZL?

 

[Pcl]

LH 016 545 13 32 date: 94m06 I'll attach a picture of the Can.

Seriously.. I want to again express my gratitude, without this forum, I would have been left in a lurch. And shudder at the cost of diagnosis and parts.