Thanks, Karl, PM sent. The typical culprits for these cars, which are nearly identical functionally to the W140s of the same vintage, is bad wiring. However, mine has all been replaced as has the ETA.
As for the diagnostics, they’re actually pretty good for this vintage model, and for that matter, the same on all other MBs of the same vintage, so there’s nothing unique as far as the V8 W124 over any other model produced at or around the same time. I’m not ready to toss in the towel. It’s narrowed down now so it’s just a matter of being able to zero in on the affected part and have at it.... Thanks! Dan > On Feb 25, 2018, at 1:52 PM, Karl W <dr.wittne...@gmail.com> wrote: > > When I bought the 1994 E420, it went into limp mode. Straight off the > trailer! I took it to Herbert, my cranky German mechanic, who took one look > and said why did you buy this piece of s***? I said I thought you liked w124 > cars? He said yes, but not the V8! Ended up needing wiring harness upper and > throttle body. > > I think switching out the computer modules is standard diagnostic practice if > you know the harnesses and throttle body are good. I have backups for all of > them in a box. They come up on the 500e board a lot. A guy named Jeff Wong > aka captruff will buy w124s and part them out, usually wagons, 400 or 500e. > Gsxr and others also. > > Herbert did say that one half of the ignition will routinely die willy nilly > and that the diagnostics are terrible. I guess that comports with your > findings thusfar. > > I can send you whatever modules I have. > > > > > >> On Feb 25, 2018 10:17 AM, "Dan Penoff via Mercedes" <mercedes@okiebenz.com> >> wrote: >> So my confusion continues: >> >> 1993 400E (W124.034) >> >> Complaint: In limp home mode, ASR light is lit at all times. Engine has >> high idle (1200-1300 rpm) and surges with no load. When loaded (in gear or >> driving) engine is smooth and performance is good. Engine harnesses, both >> upper and lower, have been replaced. ETA has been replaced with a Mercedes >> factory unit. Accelerator cable and linkage are adjusted to spec. >> >> Diagnostics: >> >> Analog (LED) tester and blinks: >> >> LH - OK >> CC/ISC - 2 >> ABS/ASR - 30 >> BM - OK >> EZL - OK >> >> With the SDS I got: >> >> LH - OK >> EZ1 - 017 - Crankshaft position sensor L5 (current fault, could b a >> “phantom” fault according to the WIS) >> EFP/TPM/ISC - 014 - Control module EFP N4/1 (stored) >> GM - OK >> ASR - 030 - CAN: No reception from EFP N/1 >> >> I can’t find anything in the WIS for a code 014 for the E-GAS (EFP) module. >> >> Is it possible I have a bad E-GAS module? I have one on hand with a >> different number, however, it came from a car without ASR if that matters. I >> know that that number 2 for the CC/ISC is a real laundry list of stuff and >> is not terribly conclusive with the analog tester. >> >> Close inspection shows the diagnostic connector to be clean and intact. >> Wires in the box are good as well and show no indication of damage or wear. >> >> I’m befuddled. >> >> -D >> >> >> >> _______________________________________ >> http://www.okiebenz.com >> >> To search list archives http://www.okiebenz.com/archive/ >> >> To Unsubscribe or change delivery options go to: >> http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com >> _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
