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Originally Posted by drdd
did you reset the computer by disconnecting the neg battery cable for at least 10 minutes?
I've heard you can 'blow out' the intake by leaving the EGR out of the hole and giving the engine a few revs to blow out the carbon ...
what about swapping that O2 sensor with another one further down the exhaust? or, better yet, replace it.
you didn't use Bosch plugs did you?
all that running rich ... is your cat shot yet?
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Yep, I reset the computer after pretty much any change or repair.
I've heard of doing that as well, but have not tried that yet. I'm going to try it once the engine's up and running again (still checking some things). The EGR passages in the intake are pretty clean already because I cleaned them out when the top of the intake was off for replacing the CPI unit, but it can't hurt. Especially considering it didn't take long at all for another piece of carbon to wedge itself in the EGR valve after I cleaned it anyway.
The O2 sensor is fairly new, I replaced it in June after fixing the first bad CPI unit, I figured all that running rich probably fouled it out. If the spark plugs don't look too bad from the current problem, I probably won't even worry about the O2 sensor.
And no, I don't use Bosch plugs. If it's a GM car, I stick with AC Delcos.
No, the truck isn't shot yet, LOL. It's not mine though, just helping out a friend.