Rough idle with forced induction

Mitco39 · 08-22-2014, 09:07 AM

Quote:

Originally Posted by jwick

Mitch - Figured I would bring this thread back to life and see how things are working since it's been over a month since you made the changes to O2 sensor removal and 'cold' settings.

How's the car running? Still have any symptoms?

Ever find a fix for the hiccup or is the going theory still that the missing PCV system is causing it?

The idle is much much better, it still does a bit of the hunt but its 75% better I would say. It no longer sounds like its working its a$$ off just to stay running. 0 other issues related to deleting those O2s to date.

Still think it would be helpful if several of the BP guys could post log files of identical conditions (i.e. same parameters and idling conditions)

Quote:

Originally Posted by jwick

Did the modifications to the cranking table end up fixing your hot start issues?

To be honest with you I have just been living with the hot start issue right now. But when I go and retune for these 3" charge pipes I will take a look at it. I believe its just overfuelling right now right in the cranking area. Starts great when cold, and starts fine when you turn it on after its been off for a short time. But if you let it sit and get heatsoaked she struggles at times. Im confident its just flooding itself. I also have not changed my plugs since going boosted and running sub 10:1 at times so its on the table to replace my plugs around the same time. Infact I should order up some today.

Quote:

Originally Posted by jwick

The more I look at the log request list above the more I think the tuner cable provides a few more options.

Without typing them all out, pg 8 of the Cipher manual recommends the following parameters to get an eTune directly from UpRev. There are obviously some not needed (speed, coolant, speed, throttle position, etc.) but would this list provide the stuff you originally asked for?

http://uprev.com/UpdateFiles/softwar...er%20Guide.pdf

Yes it is, sorry I never got back to you on how to get a log. I took a few screnshots and ill put them together in a mini guide for you.

Quote:

Originally Posted by jwick

I brought this back to life because for two reasons. First, I'd really like the feedback and hopefully know if this is a good fix I should add to my next retune. Second, I kind of believe that all this still ties into my having the P2A00 code for the O2 sensor.

I am pretty confident it could very well be related to your issues with that code. Reading up on it briefly its directly related to the switching of the O2 from lean to rich, which is what the car is struggling to do with those secondary 02s fighting you.

OBDII Code P2A00 - O2 Sensor Circuit Range/Performance Bank 1 Sensor 1 | Nissanhelp.com

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