So I have been chasing down a code 42 and no luck, until maybe today when I decided to remove the ac unit and dig under the dash and pull out the ECM. I think it looks burnt at one of the pin connections (see pic). I am wondering what ECM I can use to replace it with. I need to get it smogged so I am worried that the smog shop will be able to tell that I replaced it. I dont want ro flag myself with the California DMV since getting this referee smog tag was such a pain in the ass. The engine I have is an SBC 350 5.7 TBI crate engine and it is mounted to a 700r4 tranny. I believe the engine i have is was what came in a 1989 C1500 truck. My Jeep is a 1982 so all analog except for emission and engine management. Are all ECMs for all sbc 350 tbi 5.7s the same? Does the replacement need to be from a 4x4 or does the the donor car need to have had the same 700r4 tranny? Do these 1989 ECMs store Vin info that the DMV records? Thanks for the help! Also if someone has a matching ECM for sale please let me know, I have attached a pic of my ECM, numbers are a little worn.
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