Wtf Did I do to my sho? New exhaust makes my car sound like a rice burner

[11BLKFX4EB]

Is it possible that an O2 sensor got damaged during the swap? I agree the data logs would be a huge help. If sounds like a spike in AFR and the car trying to compensate wich would cause the sputtering.

 

[ZSHO]

Brenton keep us updated cause i know how fustrating it can be,had a few issues myself which later the dealer was able to fix under warranty,have the platinum extended warranty for a total of seven years. Z

 

[14SHOCAR]

I stopped by my tuner this morning and he is going to update his diablo tuner to see if the sputter is misfires.

I am going to reset the PCM per the previous thread in a couple of minutes here... I have a long drive down to Vernan Hills, IL from Milwaukee and back today -- which will give it a lot of drive time to adjust ****. It's super frustrating but its worth a shot.

My tuner is also going to be "test" loading a DiabloSport Tune on my vehicle. We are going to see how that tune works so I can go back to LMS to see WTF is going on.

I am getting the feeling that the LMS tune does not reset the shift points or the adaptive fuel curves when you install the tune. I think you HAVE to do a PCM reset every time to get less aggressive fuel curves. At idle, my car is spewing white exhaust on a 60 degree day -- it smells very rich (it doesn't smell like burning oil at idle).

I also am experiencing a rough idle too... Straight up frustrating. 

 

[14SHOCAR]

Brenton keep us updated cause i know how fustrating it can be,had a few issues myself which later the dealer was able to fix under warranty,have the platinum extended warranty for a total of seven years. Z

What was your issue?

 

[ShoBoat]

I stopped by my tuner this morning and he is going to update his diablo tuner to see if the sputter is misfires.

I am going to reset the PCM per the previous thread in a couple of minutes here... I have a long drive down to Vernan Hills, IL from Milwaukee and back today -- which will give it a lot of drive time to adjust ****. It's super frustrating but its worth a shot.

My tuner is also going to be "test" loading a DiabloSport Tune on my vehicle. We are going to see how that tune works so I can go back to LMS to see WTF is going on.

I am getting the feeling that the LMS tune does not reset the shift points or the adaptive fuel curves when you install the tune. I think you HAVE to do a PCM reset every time to get less aggressive fuel curves. At idle, my car is spewing white exhaust on a 60 degree day -- it smells very rich (it doesn't smell like burning oil at idle).

I also am experiencing a rough idle too... Straight up frustrating.

A few members have been experiencing issues with the tune files and "winter gas" blends. Judging by your location this might be the case. I know with my own testing older winter gas and ethanol blends were causing real issues with my car. I did a 1/2 tank at another station of 94 + 10% E and my car was experiencing more misfires as logged by the PCM and was pulling all kinds of timing. I have gone back since to my usual station (the busiest in my area) and the KR is much better and no misfires. Just my 2 cents.


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[14SHOCAR]

How does adding E to your gas test* the winter blend? Don't you think that we pay for a tune to not cause misfires ... Not to cause problems... Livernois should come up with a fix for this??

 

[ZSHO]

I am quite confused based on so many posts and suggestions lol,would like to know if your issues started after the DP and exhaust install. Z

 

[ShoBoat]

How does adding E to your gas test* the winter blend? Don't you think that we pay for a tune to not cause misfires ... Not to cause problems... Livernois should come up with a fix for this??

Can't tell you an answer, all I know is what I experienced. The E is blended into the gas at the pump. We can't get anything above 91 around here that isn't 10% Ethanol. So the Ethanol may or may not be contributing to the issue. (The only reason that it might is if the gas is old and has water in it) Yes I agree that LMS should have a fix. That said it seems that if yours is the same issue as mine was we are in the minority. So a fix may not be coming anytime soon.


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[ajpturbo]

14shocar I'm 99% sure that anytime you flash your car with a tune all the adaptives are reset...the kam is reset due to the flash process...kam is keep alive memory

Also, I highly doubt you are running rich at idle...that's where logging is the only answer rathe than speculating...the only way u would be running rich would be if u were in open loop and only a complete moron would force open loop at idle for this application....actually these cars run closed loop in a way even at wot but I won't really get into that now .....

 

[11BLKFX4EB]

Wouldn't a bad O2 also cause the car to run rich?

 

[FoMoCoSHO]

Also, I highly doubt you are running rich at idle...that's where logging is the only answer rathe than speculating...the only way u would be running rich would be if u were in open loop and only a complete moron would force open loop at idle for this application....actually these cars run closed loop in a way even at wot but I won't really get into that now .....

Tease...

 

[ajpturbo]

Wouldn't a bad O2 also cause the car to run rich?

Sure..I guess that could....damn he could use a log lol

 

[ShoBoat]

Just to clarify mine only had issues at WOT. Not at part throttle and at idle.


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[14SHOCAR]

I apologize for intefering,but this is reference to the OP.was curious to know if you used new gaskets x4,or if you re-use the old ones it will leak causing o2 sensors to read incorrectly causing fluctuations on your AFR. Z

Yes. This problem only happened AFTER I installed the catback + downpipes. LMS sent me updated tune files.

Just to clarify mine only had issues at WOT. Not at part throttle and at idle.

I did the PCM reset yesterday because I'm pretty desperate for answers here..... and I haven't had a rough idle since. This problem is now ONLY at WOT.

Sure..I guess that could....damn he could use a log lol

AJPTurbo -- I drove around with one of the Diablo tuners connected + a tech. He said at idle my A/F was "around 14"  Not sure exactly that is good but that is what he stated.

When we got to an area where we could go WOT I experience the shuddering at the top end of the RPM band. We are getting a vacuum boost gauge to see the difference between commanded and actual boost (versus what the map is reading). He is thinking that there is a boost cut-off happening as he said it doesn't feel like misfiring... he said it feels like its removing fuel and pulling back timing.

I am not going to represent myself as relying this information 100% correctly, nor that I know what the car is doing on this one guys... I'm just relaying what I believe he said.

That might make sense for why the fuel pressure drops -- because we are somehow hitting that "max boost" and it does a boost cut. My guy said he does a bunch of Subaru's that are doing 22+PSI and he has to fine tune the boost cut-off because it does almost the exact thing.

 

[11BLKFX4EB]

Have you tried going back to stock MAP and stock tune to see what happens at WOT to see if the shudder is still there?

 

[14SHOCAR]

I can't because I have catback... I'm assuming the stock tune doesn't have the rear O2 delete

 

[11BLKFX4EB]

I can't because I have catback... I'm assuming the stock tune doesn't have the rear O2 delete

You should be able to run it. All it will do is throw a code, and that shouldn't come on for about 50 miles. Should be plenty of time to log and see if it shudders. If it still shudders, my money is on a bad o2.

 

[SRT82ECOBOOST]

The lack of a great sound from these cars is what eventually drove me back to a V8 platform. Either it is no sound or a ricer sound without anything in between.

 

[sunwolf]

To me this car is too much of a sleeper to make it loud. Still would like to be able to get a good sound that doesn't scream but has more volume than stock.

 

[liteyouup]

The lack of a great sound from these cars is what eventually drove me back to a V8 platform. Either it is no sound or a ricer sound without anything in between.

Did you think because it was a Ford, it would sound like a Mustang?  What kind of sound are you expecting, exactly?