O2 Spike!

[eboggs_jkvl]

I am getting suspicious of my B2S1 O2 sensor. I thought I had it down to a specific situation of 0 MPH and .5 TPS but the darn thing hit twice during speed. I do see that the TPS is .5 so I am coasting. That is where I get the spike. Coasting or sitting at idle.

Dial up beware it is 135K Spreadsheet.


http://www.ls2.com/boggs/o2short.xls



Comments or observations?


E:)

[JandJsTA]

Yeah... it certainly looks like that way E ..... now the double check.... just quickly climb under there and switch the O2s and log for the confirmation :)

[eboggs_jkvl]

"Quickly" and my "O2 sensors" ARE NOT used in the same sentence! My turbos and actuators and stuff make the O2 sensor a "challenge". If I get the bastage out, a new one is going in. :D

You should have seen that file before I stripped out the normal data. Well over 1.6 megs. I love my A-Tap!


E:)

[eboggs_jkvl]

Ok, ROUND 2!!!

I do not think it is the O2 sensors now. Hell, I don't have a clue now. We thought the injectors might be puddling at the low IPWs so we replumbed my FPR from boost reference to vacum/boost. The idea was to lower the fuel pressure, increase the IPW and see if that helped. My Fuel pressure is 47 at idle now. We only gained .03 on the IPW (not much help) It set the LTFTs a little lean but no big deal as the PCM adjusted nicely for it. I still have the O2 spike!

Any comments on this file? Only 79K, not too big to open.

http://www.ls2.com/boggs/0406vac13percentshort.xls

I'm going to copy this to the FI forum too.


E:)