Reply To: Miss and backfire under 5k only after engine warms up – 2009 GT650R
Ok I haven’t had a chance to go for a ride until yesterday. It still backfires and misses and stalls. It seems mainly under 5 k revs. So I’ve checked all connections and replaced the coils, leads, caps and plugs and injectors. I’m thinking maybe the ecu is stuffed?
It may be your fuel pump wanning ? Have you got a new one to rule it out first ?