Idle Misfire
My mechanic and I cant figure this one out... My Blazer is misfiring on cylinder 1 but only in idle. He adjusted my timing and now its on, on another pick-up having the same problem he out a new EGR valve on and that didnt fix it either. Any of you guys have a suggestion. The only reason I care is because its giving me absolute terrible mileage, and also its running really rich! If I sit in idle for like 5 - 10 mins there is just a black puddle, and when I floor it while driving...I have a lead foot...I have a tendency to do that...I can just see a cloud of black, I can blow more black than some of my diesel friends! I dont know if this is related or not but your help is greatly appreciated and am open to any suggestions you guys think will help!
Thanks, Ethan! |
How is the O2 and map sensor response/readings?
How did he determine that the misfire is cylinder #1? Has the compression been checked? |
I cant even find the O2 sensor on there, haven't checked the map either, but those are the first two I thought of too and he used a reader that hooks onto the plug wire and reads it some how, he just told me it was misfiring on 1. I wasn't at the shop when he did it, so not 100% sure. I was going to change the O2 sensor but cant find it. And no, the compression has not been checked, the motor is almost shot so I dont wanna throw too much into it, just has to last me until June.
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