dmelvin

iTrader: (8)

Hey guys.

My truck throws P0300 constantly at idle, the few times that it doesn't I've noticed 4-8* of spark advance on my aeroforce, when it does throw it, I see 14-18*. I told Justin that it wasn't a big deal at the time because it wasn't throwing it quite as much, I had already had his cable a month, and I can clear it with my gauge, but it's starting to get annoying. Is it possible that the TPS may be going out on me? Thinking it's getting some throttle?

As soon as I do give it a little throttle, the misfires disappear.

Idle is 680-720 after it's warmed up.

Also... I see up to 7* knock retard when I load the motor going up a hill and don't let the converter unlock... this may be normal, as I know nothing about tuning.

Let me know what you think.

2007chevy5.3l

iTrader: (21)

7* of Knock under load is NOT good... Could it maybe be a O2 sensor going out?

dmelvin

iTrader: (8)

Could be. Wide band said it's right on though. It's not very often I see 7*, usually 4-5, I've seen it shoot to 7 though. It always comes up with some though, driving down the interstate, it'll usually bounce between 0 and 2*

2007chevy5.3l

iTrader: (21)

hmmm im curious if your timing is just set too high then... be nice to have a log of whats going on

dmelvin

iTrader: (8)

I agree it would be, but I don't have a cable.

Blue 04 Z71

Did you ever get this figured out? My new 6.0 is spark knocking. It only has 5,000 miles on it. I had Justin tune it for the 6.0 before I dropped it in. I see up to 5 on my aeroforce. Low rpm and passing gear on the hwy.