Mitsubishi Repair: 1991 mitsubishi montero stalls at hiway speeds, mitsubishi montero, black boxes


Question
I changed the relay,and it started up and run great for 10 miles,and then in the snap of your fingers the engine light on,and the engine was dead,now the codes say the ECU is dead,4 times it has done the something and each time it has diffrent codes or no codes at all, sets in the driveway for 2 days and it will startup again
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I change the computer controler,but there is a relay that puts power to the computer. It is behind the clove box,but l don't know which one it is,and they want big bucks for those relays  note-distribuor-dealer only $800.oo
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I think it maybe the relay for the computer. I just have to figure out which relay it is,Haney's books are not every good detail
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After coding i changed the distributor,it started i drove it about 15 miles, check engine light come no,and the after a bout 2 mile light went out,shut motor off, and it would not restart,after sitting for 3 hours there was no spark
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Randy: Have you check or had your computer tested? I know I wrote to you about the problems with the computer. And the computer does control the stark getting to your stark plugs. Did you ever have the car coded? I still think the computer of your car is dying. Get that computer checked. Hope this helps and good luck!
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Randy: There are two or three black boxes inside with the engine that have all kinds of relays in them. I can't say I ever saw anything about the computer. I think the computer controls the relays. If the computer goes dark, everything in your car stops working. Because the computer controls everything. But anyway, there is a black box up by the firewall on the driver's side of the car and then one or two more black boxes over by the battery or on the other side of the car on the firewall. On the boxes it tells what everything is in each box. I did check the internet and could not find a thing about a relay that control the computer. I really think it is the other way around, but I could be wrong. Other repair manual to try would be a Chilton. I really can do nothing more for you on this. Hope this helps and good luck!
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Randy: I talked to a friend this afternoon, and he said are you sure it is the computer. Or that relay? Because it could be that your broke your timing belt and that is why the car will not start. Other wise he said try the Chilton manual he likes them better. Check on line or go to your library, they carry all kinds of manuals on working on cars, they might have what you are looking for. Hope this helps and good luck!

Answer
Randy: This is it, I will not answer anymore questions from you, write bad reports on me. I just don't care anymore. You will have to spend the money, around $150.00 I believe it was on the net to get your car's computer rebuilt or buy a new computer, no idea on that cost. It is after all that computer, everything points to it. Replace the computer, the computer not a relay, or a fuse or something else. The computer. Once that is done, your car should run just fine. I mean with all the other new parts you have put into the car. Either that or get another car and start with that one. I did about the same thing you just did with your car, only the car I had was a Ford. I replaced everything else but not the computer. Finely replaced the computer and the car runs like a dream. I do hope you listen this time and do have a good day!