Mode 6 data not working

[morechickfila]

Hello peoples. I'm pretty sure my car is misfiring but not enough to show a code. I'm trying to check mode 6 data but its saying test not complete (used bluedriver and also tried forscan). I have used mode 6 for my Tacoma before but it just doesnt work for this car. I just got this car a month ago. Its a 2011 mustang gt, with a 321 coyote swap. It is tuned by Rob Shoemaker. Can a tuner disable mode 6? I just have no idea why its not working. I have driven at least 1,000 miles so I dont think its a drive cycle. Any help is appreciated. TIA

 

[cavero]

A tuner can definitely turn off the rear O2 sensors, which theyre known to do in states that are a little more lenient on emissions

I'm dealing with that right now, I think my tuner turned it off to avoid check engine lights while they were making some adjustments and forgot to turn them back on. I used both Torque and the OBDLink MX app with my BT OBD adapter (an OBDLink MX) and both show notta on the Rear O2 sensor readings. Not a 0.0, just '-'. And the Catalyst test (believe that's Mode 06) just says 'Not Ready' for the last 5000 miles of driving (how's that for a drive cycle?)

 

[morechickfila]

@cavero Oh yes, my rear o2 is disabled. they are unplugged. But would this disable the misfire tests in mode 6? I need to see the misfire counts for each cylinder which youre supposed to be able to do but mine shows not complete/unable to test/no data

 

[cavero]

Ah, no I don't think that would, my misfire tests are completing. Disabling misfire tests I'm not sure about

 

[cavero]

Misfire Monitor Neutral Profile HELP!!!!! | S197 Mustang Forum - S197Forum.com https://share.google/BFPNP8aryOsF6B8HW

Found a thread where they were saying the test could be turned off

 

[morechickfila]

This is what it shows. A bunch of tests are not ready even though I haven driven the car hundreds of miles.

 

[Juice]

You are asking about misfire codes and show screen of O2 sensors not ready.
O2 sensors have absolutely NOTHING to do with misfire detection.
Yes, misfire monitor can be 'hidden', but not disabled. And your misfire counts would be further down the screen.
Not ready - all this says is the test has not been completed by the pcm yet. If you have deleted the cats, that would be a reason the tuner made changes to the tune, and if that is the reason for 'not ready' they will never go ready.

Back to the misfires. Why not simply do some basic diags like pull and inspect spark plugs? If you do infact have a misfire, one or more will not be like the others.

 

[JC SSP]

I have to ask... if it was tuned by Rob Shoemaker why not ask him?

 

[morechickfila]

You are asking about misfire codes and show screen of O2 sensors not ready.
O2 sensors have absolutely NOTHING to do with misfire detection.
Yes, misfire monitor can be 'hidden', but not disabled. And your misfire counts would be further down the screen.
Not ready - all this says is the test has not been completed by the pcm yet. If you have deleted the cats, that would be a reason the tuner made changes to the tune, and if that is the reason for 'not ready' they will never go ready.

Back to the misfires. Why not simply do some basic diags like pull and inspect spark plugs? If you do infact have a misfire, one or more will not be like the others.

Yes I included that to show a bunch of tests are not ready. It says the same thing for the misfire counter. Disabled rear o2s shouldn’t affect the misfire counter.

I replaced all the spark plugs. Coils looked fine. It would just be easier knowing which cylinder is misfiring rather than guessing or replacing all 8 coils and possible fuel injectors.

I asked rob if misfire counter was enabled, he said it is.

 

[Juice]

Why shoot the parts cannon when you could do a compression/leakdown test?

 

[GlassTop09]

I have to ask... if it was tuned by Rob Shoemaker why not ask him?

......this.

This is what it shows. A bunch of tests are not ready even though I haven driven the car hundreds of miles.

View attachment 114804

Also, hate to bring this up........if you're really looking at that Forscan IM Readiness OBDII Component Self-Check report (Mode 6 data), the 1st thing you really should be checking into is why the WB & NB O2 sensor monitors aren't running.......especially B1S1\B2S1 (both WB's...).......starting w\ the O2 sensor heaters (w\o these running, this will throw off the O2 sensor Lambda feedback correction which can most definitely throw off the front end Lambda AFR thus can influence a\several cyl(s) misfire(s)) & not get too caught up into why the misfire monitors aren't working yet..........especially if the ECU has been tuned thus a lot of tuners count on the WB's\NB's to make the necessary CL back end fuel corrections to the base recalibrated MAF transfer tables they use to bring the Lambda values back in line.......just a fact. Easier than going in & really dialing in the MAF transfer table accuracy......another fact.

Since this topic is concerning a Ford Copperhead ECU (11-14 Coyote.......) which runs under CL across the board, this is even more serious of an issue........

The O2 sensor monitors should easily complete well within 100 miles.........heck, they should complete within 20-40 miles (all O2 monitors are continuous monitors meaning that they are running from engine startup to engine shut down during every drive cycle, but they will only update to the ECU IM Readiness Mode 6 Component Self-Check report 1 time during a drive cycle.......so the question is, how many drive cycles did the OP make within the 100 miles? If more than 2 drive cycles, then this also indicates there is a serious issue going on.......) .............

If you don't have any O2 sensor related DTC's (the Forscan readouts are showing you that there shouldn't be any DTC's.........as all of the O2 sensor monitors aren't even running, thus the ECU doesn't have any\enough data recorded on them to determine any pass\fail parameters.......why they show "not ready"........).

At this point, there are only 3 things to check, 2 of these are on the OP..........1.) check O2 sensor heater 12v+ power circuits from BEC to sensors to ECU to ensure that the ECU has control of the O2 sensor heater circuits, 2.) check the WB's & NB's themselves for operational integrity--kinda rare for ALL 4 sensors to fail at the same time.....the 3rd is for your tuner to explain\resolve if the 1st 2 options check out to be good, regardless of who the tuner is........another fact.

Once the O2 sensor issues are resolved 1st........THEN start looking into the Mode 6 misfire monitors.........IMHO, you're putting the cart before the horse.

Hope this helps.

 

[Juice]

O2, O2 heater, and Catalyst monitors are a buggerfugger to get to run after mods. I've seen ppl post that a BONE STOCK Ford they bought won't run those 3 monitors.
Funny thing, Misfire Monitor goes ready/complete without ever starting the engine. The other is components IIRC.