Daggerty Posted March 28, 2018 Report Share Posted March 28, 2018 Anybody sent an ecu in too be "rebuilt" or have experience. Every site has hit or miss reviews. Quote Link to comment Share on other sites More sharing options...
0 GunMetalGrey Posted March 29, 2018 Report Share Posted March 29, 2018 Define "rebuilt" An ECU is not something where you generally need to service internals. If you are talking about getting things flashed out or having a new tune loaded, TRM tuning has always done me well. Quote Link to comment Share on other sites More sharing options...
0 Daggerty Posted March 29, 2018 Author Report Share Posted March 29, 2018 This is for my mercedes the ecu is bad but want to explore other options before I pull the trigger on a $1100 ecu. There is companies claiming to rebuild them so basically a reman unit. The $1100 is for a reman a new one is $2400 Quote Link to comment Share on other sites More sharing options...
0 Daggerty Posted March 29, 2018 Author Report Share Posted March 29, 2018 The rebuild service is $400 Quote Link to comment Share on other sites More sharing options...
0 patsbimmer1 Posted March 29, 2018 Report Share Posted March 29, 2018 They can be rebuilt. I'm certainly no techno wiz when it comes to computer boards but I know that boards can have pieces fail and they can be replaced. Replacing the injector mosfets on n54 PCM's is a fairly common occurence instead of replacing the entire PCM. I don't have any experience sending one in but I have done it myself with very positive results. Quote Link to comment Share on other sites More sharing options...
0 Daggerty Posted March 29, 2018 Author Report Share Posted March 29, 2018 That would be nice if it was one of the mosfets. It's an epprom and I looked into getting the equipment to read and write onto them but it doesn't really pay for itself. Quote Link to comment Share on other sites More sharing options...
0 GunMetalGrey Posted March 29, 2018 Report Share Posted March 29, 2018 If you got into specifics @HipMF would be a good source. Quote Link to comment Share on other sites More sharing options...
0 HipMF Posted March 29, 2018 Report Share Posted March 29, 2018 I can burn eproms if you have files. Outside of that all I can do is give it a good visual inspection under a microscope. What's the actual problem? If this is the one that had the power hooked up backwards there could be a lot of f'ed up stuff on there... Quote Link to comment Share on other sites More sharing options...
0 Daggerty Posted March 29, 2018 Author Report Share Posted March 29, 2018 2 hours ago, HipMF said: I can burn eproms if you have files. Outside of that all I can do is give it a good visual inspection under a microscope. What's the actual problem? If this is the one that had the power hooked up backwards there could be a lot of f'ed up stuff on there... Can you pull the info off of them? There is two 8 prong proms that are for the immobilizer. It won't let the throttle body operate. Quote Link to comment Share on other sites More sharing options...
0 HipMF Posted March 30, 2018 Report Share Posted March 30, 2018 3 hours ago, Daggerty said: Can you pull the info off of them? There is two 8 prong proms that are for the immobilizer. It won't let the throttle body operate. 8-pin would have to be a serial interface. I could do it, but it's harder to do than the old parallel eeproms. I would most likely have to remove the part from the board. Let me know if you have some links or something describing what you're trying to do. A lot of times security-related stuff like immobilizers is more complicated that just copying eeproms. I've read a little about EWS, and it's a complicated system that's specifically designed to be difficult to circumvent. I doubt the Mercedes system is any easier. In the case of EWS, the solution is essentially a "firmware update" that has the EWS disabled. Basically, if the firmware is a 64k ROM file, it means that someone found the 1 byte out of 65,536 that changed EWS=1 to EWS=0. The hack for the Merc system could be different, but I'd like to understand what you're trying to accomplish before I put any work into it... B C 1 Quote Link to comment Share on other sites More sharing options...
0 Daggerty Posted March 30, 2018 Author Report Share Posted March 30, 2018 Mercedes is the path less traveled when it comes to stuff like that, or if somebody figured it out they make you pay instead of sharing the information for the greater good. I am just going to buy a reman unit. There would be too much RnD. With the warmer temps I want the car ready sooner than later. Quote Link to comment Share on other sites More sharing options...
0 Daggerty Posted March 30, 2018 Author Report Share Posted March 30, 2018 @HipMF thank you for your input. Quote Link to comment Share on other sites More sharing options...
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Anybody sent an ecu in too be "rebuilt" or have experience. Every site has hit or miss reviews.
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