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01 MT "Little Red Rocket"
The first "TURBOCHARGED" Hybrid, Insight G1- (01/2003)
MaxIMA Battery (Serial #2), on 8/25/12 @ 301,520 miles
Use: 320,000 mi. @ 57.8 LMPG
Ive been thinking about trying some 2-4 steps cooler than the plugs in my car as it seems to run the timing rather retarded a majority of the time to see if that helps.
On my blown tacoma it was recommended to run 2 steps cooler plugs to prevent aiding knock or preignition. Hotter plugs would make this more likely, but be clean. Cooler plugs are more likely to foul.
Maybe I have it backwards? I see -11 to -19 timing under acceleration, that just doesnt seem right unless my sg2 likes to randomly show the - sign. Under light load in what seems like "lean burn" I see 35 degrees of timing. As you start to load up the engine the timing checks out.
It also has a lot to do with the rpm you are running. Low rpm retarded, High rpm advanced.
Add a turbo and the timeing goes retarded...because of the increase of compression.
HTH
Willie
__________________
01 MT "Little Red Rocket"
The first "TURBOCHARGED" Hybrid, Insight G1- (01/2003)
MaxIMA Battery (Serial #2), on 8/25/12 @ 301,520 miles
Use: 320,000 mi. @ 57.8 LMPG
lol i could be wrong about it or have it backward myself we are on the same page about the hotter/cooler foul issue though.
ive seen the same neg timing youve seen, so its not you sg2. Ive found 93oct gas vs 87 made a diffrence to the wide swing (recovers much faster to pos/higher timing).
Is there a age requirement on these plugs also? As my car in a 2003 (10yrs old) but only has 60k miles? Maybe it wouldnt be a bad idea for me to change them this spring with the next oil change?
The first tuneup is scheduled for 105,000 miles. You've got a few miles to go. But age on the fluids might be a reason to change/flush etc them.
If you're worried about the plugs just pull them and check the color etc. It they look tanish just check the gap and reinstall them.
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we are on the same page about the hotter/cooler foul issue though. 
