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Houston, I have a problem. Just finished replacing plugs, plug tubes, and bleeding brakes. Got all finished and started it up. It has been sitting for a couple of weeks, but it started right up and sounded fine. I decided to let it run for a bit a warm up. After about 10 minutes, before it was up to temp, the CEL started to flash. Not good. I know I need to get something to pull the code off of it to see what is going on. But in the mean time I am just wondering what is going on. I am assuming it is related to the plug change, but it is strange. I would think it would run rough if there was something wrong. I was sure to torque the plugs down to proper spec. I changed out the tubes because there were signs of leaking from a couple of them.

I hear that a flashing CEL is the worst, so I am just wondering what related to a plug change could cause it.

Any ideas on what may have caused it?