No More Pinging

City
reno
State
nv
#1
My Mopar'd 258 always pinged hard under load, especially w/ a loaded pack mule trailer. Tried all sorts of ideas to get it eliminated, but gave up and just lived w/ it. So two weeks ago leaving for a day run there is this awful smell in the cab, like ur following a smoky diesel truck. Quick check reveals nothing out of ordinary. Hopped on the freeway and WOW! it now has more power-- i can actually accelerate past old man motorhomes!

cat blow out? temp sensor playing games?

ideas?

This is the 1st time she 'broke' and actually ran better-- lots better like it should. hahaha

mb
 
N

n9viw

Guest
#2
O2 sensor, perhaps, or MAP sensor. Ping is caused by predetonation, which is either timing or a lean condition making things hot. If the MAP or O2 is sending the wrong signal to the ECU that's controlling the mix, it'll always throw it lean to be on the 'safe' side. Could be that whatever was wrong got 'screwed up' in your favor? :rolleyes: Who knows, it's all black magic, that's why I stick to carburetors. :D
 
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