geeitup
02-16-2015, 04:31 PM
Need some help.
When idling, my AFR increases about 4% in about 2 seconds, sometimes off scale then come back to its baseline of around 13%. It does this every 10 seconds or so. The engine sound also kind of makes a "quieter" (hard to explain) sound when the AFR increases.
I don't have any codes and nothing follows this AFR jump on the consult display. Only strange thing is O2 voltage on consult display always shows 0. Replaced 02 sensor. Good signal continuity on the connector to ECU and good voltage on 02 heat. I have yet to check signal voltage. Don't think this is related though since open loop at idle anyway (?)
I suspect I have an exhaust leak ahead of the turbo since I have an engine vibration. A friend thinks the vibration is the turbo itself. Seems to build boost ok. I know exhaust leaks can do funny things to afr, but the rhythmic nature of the afr bump doesn't sound like a leak to me.
Stock except usual bolt ons. Stock ECU and injectors and MAF. I recently recirculated the bov. Only got the consult and wideband recently so it may have been doing this for awhile.
When idling, my AFR increases about 4% in about 2 seconds, sometimes off scale then come back to its baseline of around 13%. It does this every 10 seconds or so. The engine sound also kind of makes a "quieter" (hard to explain) sound when the AFR increases.
I don't have any codes and nothing follows this AFR jump on the consult display. Only strange thing is O2 voltage on consult display always shows 0. Replaced 02 sensor. Good signal continuity on the connector to ECU and good voltage on 02 heat. I have yet to check signal voltage. Don't think this is related though since open loop at idle anyway (?)
I suspect I have an exhaust leak ahead of the turbo since I have an engine vibration. A friend thinks the vibration is the turbo itself. Seems to build boost ok. I know exhaust leaks can do funny things to afr, but the rhythmic nature of the afr bump doesn't sound like a leak to me.
Stock except usual bolt ons. Stock ECU and injectors and MAF. I recently recirculated the bov. Only got the consult and wideband recently so it may have been doing this for awhile.