Originally Posted by Old4X
How is your valve timing?
Don't make me check that
I don't have a degree wheel or the other stuff. But as smooth as the Jeep idles and as strong as it pulls from 1200 to over 3000 rpm I tend to believe its right on. I'm always amazed when I read on here about people having to floor the throttle to run over 65 or 70, especially with six cylinders. I can merge onto the expressway by the house and cruise at 70 or more with probably less than half throttle once up to speed
I'm a firm believer in the function of the EGR to lower combustion temps and thereby help with reducing detonation. I've been wrenching on cars and bikes from the 60s all the way up through the latest computer stuff. And the EGR is one of those things that actually helps-if it works right.
The pinging was kind of weird(remember, this was last summer in the heat and so far its been cool and no pinging) - most driving is around town between 35-45 which is barely off idle on the throttle. Normal slight addition of throttle to accelerate with traffic would get noticeable pinging. A little more aggressive and it seemed like less pinging. But hard acceleration would go back to the stick down the picket fence kind of rattle.
The nuttered and rebuilt BBD runs a little rich at idle and off idle, but not enough to foul plugs. All but one look pretty normal. Number 4 cylinder apparently is where all the oil disappears and that plug cokes up pretty quickly lately. Which doesn't seem related to the pinging since its not pinging lately.
Since I mentioned the carb, there is a 2150 sitting in the garage awaiting clean up and rebuild kit. At the rate other stuff keeps breaking around here, I'll be proud if I get it swapped in by maybe June.
And speaking of breakage, now my timing light is on the fritz. Works only when it wants to. Always something.