I had noticed that sm would go haywire when I would take GN out on short or long cruises. Clear up for a little bit but then go haywire again. SM Lights would blink , go blank then read again. Codes from 42 to 55 would show up. After I cleared the codes, it would drive fine then sm would act up again. Well, today ecm fried. as I took her out for a spin it started doing the same things. When I got home , I had ecm out of side panel. With car on, if I flipped ecm sideways, GN would turn off, if I layed ecm flat on floor board, GN would stay running. After the 3rd time of turning sideways I saw smoked,GN turned of and wouldn't re-start. I switched ecm with GN #2. And GN#1 started right up. Was ecm going bad or do I have another issue? Here is pic of smoked ecm. Did I fry my power logger as well,along with my TT chip?
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