Two ECM questions. One is for Canadian owners. (Page 1/1) k5ahudson SEP 22, 07:44 PM Hi all! I have an 85 Fiero SE with a 2.8L V6 with a manual transmission that needs a new ECM. I think I have found an ECM locally, but it is out of an automatic. Will it work in my standard or is it a totally different ECM? Second, is there a difference between the ECM of an American Fiero vs. a Canadian Fiero? After all we are on the metric system in Canada, but in the U.S. you are not. Thanks Patrick SEP 22, 08:30 PM I believe it's the attached PROM, not the ECU itself, which differs between automatic and manual transmissions. I also highly doubt there's any difference between the ECUs used in Canadian and US designated Fieros. I suspect it's just the speedo/odometer that's different. But let's see what others say... 82-T/A [At Work] SEP 24, 09:33 AM quote Originally posted by k5ahudson: Hi all! I have an 85 Fiero SE with a 2.8L V6 with a manual transmission that needs a new ECM. I think I have found an ECM locally, but it is out of an automatic. Will it work in my standard or is it a totally different ECM? Second, is there a difference between the ECM of an American Fiero vs. a Canadian Fiero? After all we are on the metric system in Canada, but in the U.S. you are not. Thanks For MOST Fieros, the ECM is the same between manual and automatic for all years except 1985. The 1985 ECM is actually slightly more desireable as it has additional features such as support for a Knock Sensor and some other things. Otherwise, the ECM is the same across the board. The difference is only the PROM (and of course, the wiring harness). Here's the V6 PROM / ECM Application Guide: You'll also notice that the only difference between the proms are for Federal and California. Cars sold in Canada had the "Federal" programming. The difference between Canada and U.S. is of course the dash / gauge cluster. Everything went to metric, and even different symbols for full / empty for things like fuel tank and such. The only difference, really, between the two that I'm aware of, is the motors that are used to drive the speedometer and the odometer: You will have two BLUE motors in your speedometer cluster. K stands for Kilometers, and M stands for Miles (why they didn't make it M for Metric and S for Standard is behind me). Back when I was still pretty young, I converted my gauges to Metric because I thought the higher number looked cool and more impressive as the speed swept up through the speedometer. Haha... When I get the car out of storage, I'll probably keep it metric. I found the speedometer (and gauge cluster) in a South Florida junkyard, where many Canadians liked to visit during the winter... even bringing down their Pontiac Fieros... and... 3-cyl Turbo Pontiac Fireflys...