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can you switch PCMs back and forth?

4K views 0 replies 1 participant last post by  jrangel2006 
#1 ·
I was having a issue passing emissions. I had the ms1k first gen, mpx catted downpipe, Mopar catback. I failed because of high NOx and odb said not ready on o2 sensor and cat. So I switched back to ms1 and changed my plugs and tried again and passed. My question is , can I switch back to my Ms1k without any problems? If so, is there a limit to how many times I can switch back and forth
 
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