FRP dropping, FDM failure? (w/datalogs)

[AJP turbo]

How long (miles) have these plugs been in the car, and what is the gap?  More often we see a fueling issue than an ignition issue once plugs have been changed and gapped properly.  How many logs have you done on the latest revision prior to the limp home incident occurring?  If there are no codes, it could be the car adjusting to the tune, as it seemed to do before.

About 2K miles on the plugs, gapped @ .030.  These were my first recorded logs with the new revision, but a few days ago, I did notice (after one of the stumbles), that I had 10* of spark retard (see Min value in photo).  I assume that's a result of knock?

Did you check the relays,fuses by by the engine compartment....try swapping them around.  Z

Haven't swapped any fuses or relays yet.  I'll have to look up which ones are which.

The spark you reference in that pic is not spark retard from knock....It's displaying the total spark advance and the min and max values could've happened at any time.

At one point you hit a very low spark value and who knows why...It could've been commanded for all you know...At startup, on an up or downshift due to tq reduction who knows really.

You are mistaken the spark advance PID for knock sensor I think.

[hawkeye93]

Yeah, I knew it could have happened at any time.  I wasn't sure the cause of the spark retard, I kind of figured any retard was due to knock.  But that's why I put the question mark...

[hawkeye93]

Update: New tune from Torrie fixed the issue.  A quick WOT shot only produced 18 PSI, instead of the 20+ PSI I had been seeing.  Wasn't datalogging today, but car ran strong, and no limp mode.  Thanks to Torrie and all who replied.

[SHOdded]

  ENJOY!

[FoMoCoSHO]

Yeah, I knew it could have happened at any time.  I wasn't sure the cause of the spark retard, I kind of figured any retard was due to knock.  But that's why I put the question mark...

You might want to get rid of spark advance and use "knock sensor". That will give you a better idea of when your knock sensor is making corrections.

[StealBlueSho]

I was tuned by Unleashed and had similar fueling problems... trying to run as rich as he has you is just going to beat the crap out of the fuel rail..  before you start suspecting hardware problems, give your tune a good hard look... I am talking from experience. I replaced the LPFP, HPFP, and FDM while tuned with Unleashed. I am not saying anything bad about them just double check before spending hundreds of dollars on fueling parts that may not be the issue..