1994 C220 will not start after harness replacement

3021 Views 6 Replies 5 Participants Last post by 2benzfam, May 13, 2010

coachivan

Discussion Starter · Apr 6, 2009

Ok the car died and would not restart. The harness that runs to the MAF was melted. I decided to change the harness today it took me about 6 hours total. Was not the worst job I have ever done but was no fun either. I could have routed it better but what the heck the engineers that designed it probably figured that it would never need replacing. Now I have no spark and no fuel. How do I test the ECM?

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cjshade

· #2 · Apr 6, 2009

ECU

I've heard of Guys buying them off of e-bay and swapping them out. Have you tried starting the car with the MAF unhooked? It should run in default mode unplugged. You probably toasted your original one with the wiring problem.

Good Luck!:thumbsup:

C as in 220

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doin12volt

· #3 · Apr 6, 2009

Well, I dont know if it will help, but Gene over at landautodismantling.com posted a c220 ECM on Ebay - he has it set at 199.00 or best offer - Id say offer him 150, he might take it- then you wil know if yours is bad - might be worth a try.

heres the link:

eBay Motors: Mercedes c C220 ECU ECM ENGINE COMPUTER MODULE 95-96 (item 350174571596 end time May-04-09 17:15:48 PDT)

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doin12volt

· #4 · Apr 6, 2009

cjshade said:
I've heard of Guys buying them off of e-bay and swapping them out. Have you tried starting the car with the MAF unhooked? It should run in default mode unplugged. You probably toasted your original one with the wiring problem.

Good Luck!:thumbsup:

C as in 220

GOOD POINT CJ!!! check to see if it will run with the MAF unplugged first!:thumbsup:

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n0alpha

· #5 · Apr 6, 2009

It does indeed sound like a toasted ECM, but have you had any luck checking for voltage prior to the coil packs?

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coachivan

Discussion Starter · #6 · Apr 6, 2009

Car is fixed. The problem was the overload protection relay part #0005406745. Car is now running. Thanks for all the help.

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2benzfam

· #7 · May 13, 2010

hello all,
can anyone tell me if replace my ecm on a 1994 c220 with a used or rebuilt ecm,do i have to program the replacemebt ecm?

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