Keith Posted March 23, 2018 Share Posted March 23, 2018 In replacing the ECU on my 89 - 4ltr - 5 speed, do the numbers off of a replacement have to match what is in the unit? If not what units will interchange? Link to comment Share on other sites More sharing options...
cruiser54 Posted March 23, 2018 Share Posted March 23, 2018 They'll all work 87 to 90. 89 and 90 give a little more power. You can use one from an automatic also. Link to comment Share on other sites More sharing options...
Keith Posted March 23, 2018 Author Share Posted March 23, 2018 Cruiser - Thank you, really appreciate the advise! Link to comment Share on other sites More sharing options...
Keith Posted March 25, 2018 Author Share Posted March 25, 2018 Next dumb question, does a replacement unit have to be programmed to the vehicle VIN? Link to comment Share on other sites More sharing options...
Strokermjcomanche Posted March 25, 2018 Share Posted March 25, 2018 4 minutes ago, Keith said: Next dumb question, does a replacement unit have to be programmed to the vehicle VIN? It does not Link to comment Share on other sites More sharing options...
omega_rugal Posted March 25, 2018 Share Posted March 25, 2018 1 hour ago, Keith said: Next dumb question, does a replacement unit have to be programmed to the vehicle VIN? why should it? it`s a car not a steam account haha... Link to comment Share on other sites More sharing options...
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