Mitsubishi Repair Problems? Ask a Mechanic for Answers ASAP
What year make and model is this?
Was this a genuine Mitsubishi alternator that was installed or was out purchased from an auto parts store? This is incredibly important, as these vehicle does not get along with aftermarket alternators. Specifically, the voltage regulators they use are common to burn out the external regulator in the pcm.
Well this is the problem with these aftermarket alternators... The voltage regulators are not set up properly for external regulation. There is a reason that was the very first thing I asked... A lifetime warranty is great and all, but not if you can't even get one that works you know?
Was the regulation circuit even tested before replacement, or the Allen mayor just changed as is?
Sorry the spell check is having a fun time with me today. That should have said or was the alternator just changed as is.
Well yes, it is possible the original alternator was fine and that the regulator inside the pcm failed. Whike not super common out does happen... Unfortunately it usually happens as a result of having one of these aftermarket alternators installed, meaning sometimes you'll find that you have an alternator failure, you put a cheap replacement on, and now you have an alternator and pcm failure to deal with. For the vast majority of issues though, you simply need to get the property factory alternator installed. These cheap Chinese regulators they use in the aftermarket ones simply can not be trusted.
You're welcome. Make sure all your connections are right of course, and if so get a factory unit on there and see where you stand... 99% odds you'll be fine after that. These get towed in to me from other shops all the time like this and it is nearly always just a cheap alternator at fault.
If the problem persists then we would have to consider a possible pcm issue, but we can't even test that without the factory design alternator installed (test results are useless with the aftermarket style regulators). Luckily it is pretty rare to go beyond just being the right alternator.
The pcm is the computer that runs the engine... It also controls the regulator inside the alternator. This is worst case scenario though, you definitely do not want it to be that as the pcm is not only wire expensive, it requires dealer programming as well so you can't just get a used one and their it in etc.
That should have said "very expensive". Not wire... Sorry the spell check is a little glitchy today
You're welcome. Again luckily it rarely gets to that point, the factory alternator is usually all you need.
If I can do anything else for you just let me know.