Possible Causes of Power Loss
- Thread starter WickedSHO
- Start date
If all is working correctly, better combustion, more available timing would allow you to see more negative KR numbers. If there are issues with spark or fuel delivery, then that would mean the PCM has to pullback from the edge, become more conservative, leading to a trend towards zero or even positive KR.
FoMoCoSHO said:Do you run torque?
I doubt the e-85 is your issue but knowing fuel trims and rail pressure would be helpful.
I've ran 70+% in both cars and no dtcs or cels. Pretty sure wass had same experience.
That being said that was for science, not daily driving because it will tax the ****out of fuel
.system headroom in certain parts of the rev range.
I wouldn't cut out the E85 completely but tone it down a bit.
And I agree with Rich, less is more and my new BBG seems to like 20ish. (with a splash of meth) this also puts you in the range of plausible deniability if something were to happen since e-15 is ok on our cars. If they tested and you had 40-50, they might take issue with that.
You can run 30 all day long but you will see some Kr spikes due to fuel volume.
I'd like to see your fuel trims and rail pressure....wot2-3 and wot 3-2, which is where the fuel volume issues like to creep up.
FoMoCoSHO....I logged a run to work this morning. Did some WOT pulls from 1-2, 2-3.....
WickedSHO -- Sorry it took me a bit to respond.
Did you check the vacuum line as I had described?
Did you do the plugs on you car? AKA Getting a new set and gapping them to .032? My 2014's plugs were between .035-.033 from the factory...
As per your "low rail pressure" issue, This sounds exactly like an issue that some of the ecoboosters were seeing (Just can't remember the thread). I believe it happens when you started doing mixtures of e85 and 93. Did your vehicle start having these issues after you started doing a mixture? Or did you read the code after you did the mixture?
Also I'm sure I'll get crap from people (but who cares if I open this can of worms right?) but I'm still skeptical of the mDesign Intake system. Did this issue happen after lets say after a heavy rain and then its really warm outside?? I wonder if its an issue with air density, or humidity in the intake area. I know people say that "water cannot get into the intake area" but this would explain the "random loss of power". The only reason why I say something is because I know it rained heavy before the last heat wave out in the Midwest here.
+1 for ZSHO -- is it doing better now the temperature is down or are you still having issues?
Did you check the vacuum line as I had described?
Did you do the plugs on you car? AKA Getting a new set and gapping them to .032? My 2014's plugs were between .035-.033 from the factory...
As per your "low rail pressure" issue, This sounds exactly like an issue that some of the ecoboosters were seeing (Just can't remember the thread). I believe it happens when you started doing mixtures of e85 and 93. Did your vehicle start having these issues after you started doing a mixture? Or did you read the code after you did the mixture?
Also I'm sure I'll get crap from people (but who cares if I open this can of worms right?) but I'm still skeptical of the mDesign Intake system. Did this issue happen after lets say after a heavy rain and then its really warm outside?? I wonder if its an issue with air density, or humidity in the intake area. I know people say that "water cannot get into the intake area" but this would explain the "random loss of power". The only reason why I say something is because I know it rained heavy before the last heat wave out in the Midwest here.
+1 for ZSHO -- is it doing better now the temperature is down or are you still having issues?
So last week I took the car in for what I though were the hubs...Turns out there is a separate TSB ( TSB 14-0186) for the clicking noise in the front end of my car. Requires they replace two thrust washers on the half shaft, special order parts, so waiting for them to come in.
As far as how the car is running. I still think there are issues. So I've tried a few pulls from 0-60 and what I am noticing, is that when I am break boosting the car, and I let off the break, there is a slight hesitation before it actually goes...Maybe like .5 to 1 full second. I thought it was me, but I have tried it about a dozen times in the last few days since the weather is cooler. Best stock 0-60 run was 6.0, which is off from before which was 5.3.
Yes, I have new plug...Did them when I change to the 3bar.
I did start to notice this issue right about the same time I started adding e-85 to my car.
I was talking with a buddy of mine who has a 9 sec Camaro ss...He told me to dump a bottle of octane Booster in my car and see how it preforms...I did that, but as I mentioned, that slight hesitation when break boosting is really starting to bother me....What do you guys think?
As far as how the car is running. I still think there are issues. So I've tried a few pulls from 0-60 and what I am noticing, is that when I am break boosting the car, and I let off the break, there is a slight hesitation before it actually goes...Maybe like .5 to 1 full second. I thought it was me, but I have tried it about a dozen times in the last few days since the weather is cooler. Best stock 0-60 run was 6.0, which is off from before which was 5.3.
Yes, I have new plug...Did them when I change to the 3bar.
I did start to notice this issue right about the same time I started adding e-85 to my car.
I was talking with a buddy of mine who has a 9 sec Camaro ss...He told me to dump a bottle of octane Booster in my car and see how it preforms...I did that, but as I mentioned, that slight hesitation when break boosting is really starting to bother me....What do you guys think?
WickedSHO said:
Attached ... but is it loose? That hose in particular is where a lot of oil blow by gets caught. Just because it's attached doesn't mean it isn't leaking. Did you throw a clamp on it? It just screams the same power Issues I had with my SHO. It was almost like the turbo's would spool, but once it got to a certain boost level, it would feel like a normally aspirated Taurus.
Also, remember as you add e85, it is going to increase the fuel volume as it demands more timing. (I believe, it could be a delay in the cars fuel delivery -- AJPTurbo should have more insight into this).
When was the last time you ran a few tanks of straight 93?
I wouldn't keep adding fuel additives to your SHO... try going back to a stable build before adding more variables.
So I checked the sensor yesterday after work, it was still in the same place it was when I installed the MD intake, but I did notice the blue probe on the sensor was dirty on one side, so I turned it around so that the side facing the front of the car was clean.
While I was in there, I noticed that the 90 degree tube that the intake attaches to was loose, the clamp was not even tight.
I replaced the intake, made sure all the clamps I could see were all tight and took the car for a drive. Not sure if it is in my head or not, but what a difference. Now I don't know if that fixed all the problems or if either of these were the cause in the first place.
While I was in there, I noticed that the 90 degree tube that the intake attaches to was loose, the clamp was not even tight.
I replaced the intake, made sure all the clamps I could see were all tight and took the car for a drive. Not sure if it is in my head or not, but what a difference. Now I don't know if that fixed all the problems or if either of these were the cause in the first place.
How much e85 was added?...a little would probably be ok...but a tank woe be bad ..I've never done it. But it's the stoic point that is the problem....but some others here know more than me about running a little E. ...I've never messed with the stuff
You need roughly 30% more fuel when running e85...that's why fuel pressure suffers...it's trying to dump extra fuel to achieve the commanded lambda
When ur tuner sets ur wot fuel tables he may set it for .80 that works for gas or e85 but it requires more fuel to get to .80 with E85
Depending on how much boost u run I wouldn't want more than like E20-E30
If u are close to being out of fuel at 18psi then it only gets worse the more E u have...but at 14-16 psi there should be some breathing room...with higher E content ur short term fuel from and long term trims will show it
You need roughly 30% more fuel when running e85...that's why fuel pressure suffers...it's trying to dump extra fuel to achieve the commanded lambda
When ur tuner sets ur wot fuel tables he may set it for .80 that works for gas or e85 but it requires more fuel to get to .80 with E85
Depending on how much boost u run I wouldn't want more than like E20-E30
If u are close to being out of fuel at 18psi then it only gets worse the more E u have...but at 14-16 psi there should be some breathing room...with higher E content ur short term fuel from and long term trims will show it
