pings on hard accel

[ericzz]

just tried it wit no pvc hoses connected no different .

[matt]

If either of you guys were in GA I'd say we could have you on the dyno tonight...

[surebimmer]

Could it be that he's got the o2 sensor only sampling one bank?

[ericzz]

Yes one bank but I searched and it was known to be an OK set up . Do you believe I should find a way to mix the exhaust before the cat and the sensor ? I have my sensor just in from of the obd 2 converter in one pipe only .

[ericzz]

would disconnecting it to test it be an option . In a disconnected state I am running in open or closed loop ? id this ok to try ?

[FredK]

If either of you guys were in GA I'd say we could have you on the dyno tonight...

Damn. I need NOS. I need it TONIGHT. jk

Maybe the knock sensors are reversed? You can't really tell which one is which just by pulling back the boots on the connectors IIRC; you need to trace which pin on the DME each sensor's signal wire goes to. Pin 79 and 80 if I recall correctly.

[ericzz]

would that cause a problem ?

[ericzz]

Just swapped them no change at all .

Drove home with no o2 sensor plugged in and it still does it . I have no accurate tach yet but it really only pings way up I would say 6 to 6500 and under a load hill or something . A few have mentioned dyno I can get it done local and think I will . Then I will post results .


smog test results any clues ?
Hc=21
Co=.04
Nox=14

[ericzz]

While reading up on my lack of CEL I found alot of info in regards to road speed from speedo single wire on back which also does cruise to pin 42 on DME I am going to look into this . I assumed my THR adapter covered this but I may have found a clue here .

[rcko]

Are you getting enough fuel? I ran into a similar problem and it turned out to be the fuel pump was not capable of keeping up fuel pressure thus the car leaned out at high rpms under load and due to aggresive this lean condition lead to detonation. It started at around 4.5k rpm or so.