2015 FRPP will NOT enter PE.

[icicleboy]

Guys, please help.. customer brought in a motor swapped mustang with a 2015 coyote and FRPP. Car runs great, transistions nicely, starts perfectly, maf transfer is excellent, even at wot. Problem is fuel source will not change from CL stoich. Can anyone see what is done wrong in this file? I found that the top clutch switch is not installed, not even sure about the bottom one being done right, but the clutch position says 0% which I assume is correct? Attached is the file. Thanks in adavancefoxbody 50 procharged tune.hpt

[Jn2]

Do you have a datalog of the car? I have seen it where commanded Lambda may show a higher value than what you have in the tune, how ever the actual acheve lambda is exactly what you are commanding.

So in your case, you are commanding.78 lambda(which is really rich for NA btw), so you want to check your log and see if you are achieving said .78 lambda(and that STFT and LTFT are working to achieve it).

A datalog of the issue would really help though

[icicleboy]

JN2, thanks for the response. I don't think I saved the catalog. This car has a pro charger on it. so .78 is playing it safe with very low timing until I get everything doing what I want it to. Just taking precaution. The actual WB is exactly the commanded (14.4ish) with fuel trims no greater than 4% during the pull. So the actual and the commanded match perfectly. I really didn't know if the clutch switch is the issue, or if there is something else at play and hoped there was an obvious parameter I screwed up on in the tune.

[Jn2]

JN2, thanks for the response. I don't think I saved the catalog. This car has a pro charger on it. so .78 is playing it safe with very low timing until I get everything doing what I want it to. Just taking precaution. The actual WB is exactly the commanded (14.4ish) with fuel trims no greater than 4% during the pull. So the actual and the commanded match perfectly. I really didn't know if the clutch switch is the issue, or if there is something else at play and hoped there was an obvious parameter I screwed up on in the tune.

ahoy, then yeah, keep it at .78, didn't know about the pro charger. If your wideband is calibrated for 14.7 stoich than WOT should be 11.4-11.5 air/fuel. If the wideband is calibrated for e10 then it would be 11 Air/Fuel. although it's best to use the factory widebands then rely on a Dyno. If you are getting commanded lambda that it may just be an issue with how the scanner displays it. If you search for a thread that Terminator2 posted, you will find that he was experiencing the same. Commanded would sho something like .90 lambda even though the car was running his commanded lambda of .83 like it should

[icicleboy]

Wideband on the dyno verifies with the in car wideband. the in car wideband works perfectly. the problem is that the fuel source stays at closed loop (stoich). No idea what could be causing it.

[06300CSRT8]

Back down your enrichment rate to something a little smaller, try 0.50

[06300CSRT8]

prob not it but have run into issues running other settings at their absolute max.

[icicleboy]

thanks 06300, it was at .5 all along until I just got desperate and tried 1.0. Hasn't changed at all.

[icicleboy]

does the vehicle require a VSS to enter PE when the RPM is above 0? key on, engine off I get the commanded EQ changing as it should. as soon as the car is running it won't switch over. The person that swapped this engine into this car did not hook up the VSS. Not sure if that could be the cause.

[icicleboy]

Attached is a log of the pedal going to wot, the fuel trims near perfect during wot, yet the fuel source staying at stoich. does anyone have any input?stoich.hpl

[GSLSE20B]

Change your fuel cut Tq Table DD back to 1.0 and then change your fuel cyl cutoff .50-1.00 load to .78

[06300CSRT8]

Your throttle body isn't opening to the normal position I typically see. It is only going to 80.8% but commanding 90%, normally we see it go to 89-90% in factory throttle bodies.

Can you confirm there is nothing mechanically wrong with it?

[15PSI]

Just to be safe, I would also change the 02 Transport Delay and the Constant back to stock. It is a learning function in the ECU.

[icicleboy]

Thanks for all the updates guys, I will update this thread tomorrow as I make changes one at a time. 15PSI, this car has headers, do you still recommend they go back to stock? Are you suggesting that it will learn the transport delay even if I leave the values stock?

[icicleboy]

Can I just test this issue in neutral in the parking lot? should it switch to PE just revving it like a GM would? It switches to PE commanded in my PE table at 0 rpm with the engine not running but the key on when my TPS hits the table value of Pedal enrichment.

[GSLSE20B]

Stock ECU learns transport delay in real time

[icicleboy]

wanted to update this for anyone looking for this problem in the future. I used the ford tuning guide from lasota as a reference and raised the max torque in a couple areas to 2048 as recommended. bringing them back to something reasonable (800 ft/lbs) allows PE to turn on (finally!). I'm assuming there is a torque % of max threshold for entering PE. Pretty upset this recommendation from a paid tuning guide led me down the wrong path but glad I got it solved.

[mrshanab]

wanted to update this for anyone looking for this problem in the future. I used the ford tuning guide from lasota as a reference and raised the max torque in a couple areas to 2048 as recommended. bringing them back to something reasonable (800 ft/lbs) allows PE to turn on (finally!). I'm assuming there is a torque % of max threshold for entering PE. Pretty upset this recommendation from a paid tuning guide led me down the wrong path but glad I got it solved.

I am having the same issue for my 2017 F150 with the Coyote 5.0 engine not being able to get into OP.

Can you let me know which tables had helped? they might be the reason for my issue too

Thanks

[jchambers]

I'm a bit confused here. ICICLEBOY are you saying that the car was never going to your Commanded Lambda at WOT value? That it would stay at stoich even when under WOT conditions? What was your lambse1/2 under WOT? Reason I ask is that the PCM is always operating in closed loop, even when under WOT (exception being cold start and a few other conditions where open loop operation occurs). There really is no PE mode as some might be familiar with in past years or other platforms. I'm not sure that you can trust the Fuel Source PID to be your indicator. I was the technical contributor for the Cookbook, tune more Coyotes than I care to think about, and have never had to reduce torque limiters to get the WOT fueling that I'm commanding. Something seems amiss. Post your tune and log and we might be able to see a problem elsewhere.

[icicleboy]

Jchambers,

the tune file was posted at the very first post I made. The Log was posted in post #10. of course it stayed in open loop, but commanded did LEAVE stoich, nor did source. I started with a base file made from many of the suggestions of your tuning guide. Frustrated, I finally started comparing to a stock file. I've seen on DI LT1/LT4 motors that a % of max torque is needed to enter PE (40% - 60% on many GM tunes), so I lowered the 2048 suggested in the guide to 800 and it now changes from stoich as I transition past WOT lambda throttle position.