Game Show - What's wrong with the SHO?

[nannho]

Great find and great info Blaine -- cheers and thanks for taking the time to post up for us.

Be sure and let us know how it ends up after the knock sensor replacement and KAM memory reset next week.

You can bet I'll be checking the wiring very closely tomorrow.
C.

still having a hard time locating...not sure if I am looking at the right wires.

 

[SHOdded]

The pics in this post didn't help?
http://www.shoforum.com/showpost.php?p=1298434&postcount=44

 

[nannho]

not really. Not sure where the orientation is, as its really close. Once i pop the cover off, then what? I think i am looking at the right wires but not certain as they appear to be fine,

 

[Calgary]

how do i know if there is a issue ive having similar issues to the first post.

 

[Big Mike 74]

PROGRESS!!!!

So I got a call today from the service manager with some "news" on my situation. The data that he sent up to Ford was analyzed and they noticed that just preceding the opening of the wastegate one of the knock sensors was reading about 500 ticks more than the other knock sensors. What does the computer do when it detects excessive knock? It cuts power to the engine so that it doesn't go BOOOOOM!!!! Interesting. So, the engineer told the service manager to inspect for a chaffed wire. If one could not be found he was to replace the knock sensor giving the excessive readings.

So I immediately headed over to the dealership so we could start looking. After giving the engine 10-15 minutes to cool we started digging. And what did we find? If you said a chaffed wire then give yourself a cookie. The wires go to one of the knock sensors below the intake manifold. You can see that wires that come up into a connecter and were not wrapped in any electrical tape or in any type of protective plastic shrouding and it was resting right on a 90 degree edge on the engine.

This would explain how my issue started as a once and a while issue and degraded into a full-time issue as the chaffing progressed and got worse.

First remove the engine cover just to make sure it's out of the way so you can get a good look from all angles. Look down between the 2 intake pipes.
View attachment 926
Go Digging - Big Picture

We saw a connector with wires that were not wrapped in any extra electrical tape or plastic shrouding.
View attachment 928
Chaff - Big Picture

From this angle you can better see the wires resting on the engine.
View attachment 929
Chaff - Big Picture

The chaffing is on the sensor side of the connector which means that they will have to replace the knock sensor. In the meantime we have put a piece of foam insulation on the engine where the wires rest to prevent it from further chaffing and giving false knock readings. I must say that performance is starting to come back. Since we didn't reset the KAM memory, it is taking some time for new values/averages that the PCM uses to run the engine are being used and faded out as new values are factored in and averaged. Power is coming back, the erratic RPM's are fading, the wastegate is bleeding off less and less air with every mile I go.

The new knock sensor should be in Tuesday but depending on what time it comes in I may not get my car back in there till Wednesday. I will have them reset the KAM and also check to see if there are any more software updates available to get me all up to date on everything.

I'll report back Sunday/Monday as I put more miles on my car to let you know if the condition continues to get better as well as what it's like when I get the new sensor in. I will be taking a road trip tomorrow so I will get to get a good like to see if my HWY MPG's are improving. With this issue I was only getting 21 - 22 MPG tops on the HWY when I used to get 26-27 (while driving 80MPH - 90MPH).

Now I would suggest that all of you go out and check for those wires. If they are exposed I would inspect them for any chaffing and then I would recommend wrapping them up in some electrical tape or other means of protection.

I have a 2013 with the Livernois 93 octane tune and I have spoke to other people on here for help as well as Livernois themselves about my car cutting power before it shifts right before redline it goes in and out and the rpm bounces then it shifts.....almost like it breaks up....is this what you felt? Winter blend fuel is what people are saying is my culprit its so annoying that I can't figure it out I'll try anything at this point

 

[Big Mike 74]

Trying to get this video up everywhere to see what others think....but if u listen and look closely u can hear the rpm bounce up and down and see it if u look at it as it gets closer to redline.....and the car is no where near as quick as it was

 

[Big Mike 74]

 

[Calgary]

Probably spark blowout. Check your plugs

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[Livernois Motorsports]

Mike,

It looks like the car is pulling timing and/or boost at redline. What tune are you running, and with what fuel?

 

[Big Mike 74]

Mike,

It looks like the car is pulling timing and/or boost at redline. What tune are you running, and with what fuel?

I have the 93 v8 3 bar on her, 93 octane from sunoco Or shell

 

[EcoBoostSHO]

How cold out was it when this happened?

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[Big Mike 74]

How cold out was it when this happened?

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Probably 40°

 

[EcoBoostSHO]

Okay never mind. Just wondering if you were running out of fuel. I get some weird behavior flooring it from that speed if its below 25 degrees or so...

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[Big Mike 74]

Okay never mind. Just wondering if you were running out of fuel. I get some weird behavior flooring it from that speed if its below 25 degrees or so...

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Yea it does it sometimes from a 40 mph kick down too, its very frustrating lol and the best part is it doesn't do it all the time ...prolly 60%

 

[Livernois Motorsports]

Have you emailed us with your, the car and tuner's info so we can help? Or, are you just using the forum as a sounding board?

 

[EcoBoostSHO]

Have you emailed us with your, the car and tuner's info so we can help? Or, are you just using the forum as a sounding board?

Just so I don't add to any speculation I am not in any way at this point saying there is a problem with my tune. I was running an E-85 blend (about E16-18) and that combined with the cold weather seems to contribute to the issue I discovered. I may have a fuel delivery issue (I am pretty sure it is running out of fuel pressure) or it could just be the blend and fuel requirements in cold air are too much for the car's fuel system. I'm not sure yet. I won't be finding out for sometime anyway as it is now really cold here and I won't be flooring my car anytime soon.

As for BigMike I would certainly hope he has emailed you if he thinks he has a tune issue. You guys have always been great to work with...

 

[Big Mike 74]

Have you emailed us with your, the car and tuner's info so we can help? Or, are you just using the forum as a sounding board?

Yea I e mailed u guys u said it may be because of winter fuel, I just wanted to post it here to see if anyone else had this issue stock or tuned, when I take the 3 bar map out and put the 2 bar in and tune it to stock the car doesn't do it,but when I put the 3 bar back in and load the tune it does it 60% of the time just wanted to see if it was something else anyone else dealt with

 

[Big Mike 74]

Have you emailed us with your, the car and tuner's info so we can help? Or, are you just using the forum as a sounding board?

I thought maybe the 3 bar sensor is faulty? I'm not sure if that would do it

 

[Livernois Motorsports]

What version tune are you running V9?

 

[Big Mike 74]

What version tune are you running V9?

I do have the v9 I tried it and it only made the problem worse, so I went back to v8 , and just for the **** of it I put the 2 bar back in tuned to stock and it went away completely other than having the check engine light on for o2 sensor because of downpipes, but then I missed my power and loaded the v8 one back on 93 3 bar and she started doing it again about 60% of the time