Author Topic: Help! Running rich after New GT 2871 and DDM tune (Read 49595 times)

tazz · « **Reply #25 on:** April 29, 2011, 10:22:09 PM »

Quote from: shabby on April 29, 2011, 10:17:58 PM

That's too rich, stock afr is fine or even leaner with e85.

But Im Not running E85 though hence the reason in addition to only being able to get 91octane.
Lyndon tunes to be realiable, safe street tune but can tune agressive if you choose but warns against it for me due to the fuel rating in my area.

JoshMcMadMac · « **Reply #26 on:** April 30, 2011, 08:35:59 AM »

AFR is air fuel ratio...14.7:1 ratio being the "ideal" for gasoline. More gasoline than air is running richer, something we do at higher power to be safe, say 12:1, but we want to be closer to the ideal 14.7 when idling around because it is more efficient.

shabby · « **Reply #27 on:** April 30, 2011, 10:03:58 AM »

Quote from: tazz on April 29, 2011, 10:22:09 PM

But Im Not running E85 though hence the reason in addition to only being able to get 91octane.
Lyndon tunes to be realiable, safe street tune but can tune agressive if you choose but warns against it for me due to the fuel rating in my area.

Its still too rich no matter what gas you're running, no one on the hptuners forum runs that afr, and no idea why lyndon even does that, its pig rich for an lnf.

Quote from: JoshMcMadMac on April 30, 2011, 08:35:59 AM

AFR is air flow ratio...

You mean air fuel ratio.

miller11386 · « **Reply #28 on:** April 30, 2011, 10:25:50 AM »

I have not noticed any black smoke.

I am pretty sure the car is actually running rich b.c I have my cars o2 directly by my afr gauges o2 sensor. They take independent readings.

Also I have been getting horrible mileage. And at times can smell the fuel burning.

Thurs night at autozone, I turned the car off but had the key still on in acc position and still had an afr of 17.3! So all evidence is pointing to the car being rich

elff · « **Reply #29 on:** April 30, 2011, 10:26:11 AM »

I did speak with Dave yesterday and he has exchanged some emails.
Dave seems to think it is a leak at the BOV. It's on the driver side on Miller's kappa.

miller11386 · « **Reply #30 on:** April 30, 2011, 10:51:08 AM »

I have checked that bov several times.... but cant find a leak.

Guess I will rip it of today and check it out again.....

ihawk95 · « **Reply #31 on:** April 30, 2011, 11:45:40 AM »

I have a question...when Chris and I drove back on Saturday right after we left DDM, the car was not running rich. Other than the MAP sensor code, the car still ran fine and wasn't burning up fuel. We figured he got maybe 1 mpg less than my NA. My NA is basically stock...no tune, only an exhaust, no engine mods. And of course his right foot was having a pretty good time so we figured that was probably in line with what he should expect for mileage after the upgrade. Maybe just a little low since he had to play a bit!

So here's my question...why can't he get back to that point now after clearing the codes? It doesn' t make sense to me that it doesn't do that even after he clears the codes. And he's unhooked the battery. What info is staying with the car that causes it to continue to run rich rather than going back to the way it was when we left SC? Shouldn't the car return to those operating parameters?

Btw, he just sent me a pic of the BOV and it's as clean and pretty as can be. I understand how that could cause the over boost code, but why would it cause it to run rich?

shabby · « **Reply #32 on:** April 30, 2011, 12:00:36 PM »

Quote from: miller11386 on April 30, 2011, 10:51:08 AM

I have checked that bov several times.... but cant find a leak.

Are you pressurizing the intercooler pipes?

miller11386 · « **Reply #33 on:** April 30, 2011, 12:17:19 PM »

I have just been checking it at idle. To really check it at pressure I will probably need to pull the pipe and bench test it with an air compressor id imagine.... the new turbo wont really boost too much over 5psi without a load.

I tore the BOV off, and the O ring was a bit scruffed up between the pipe and the BOV. I replaced it with the brand new one I had laying around from the original kit (came with the extra weld in fitting). However the BOV looked really clean inside considering how much oil was on the discharge port in SC. I wiped a very light black line off the inner piston, and cleaned some of the oil off the back (outside of the valve)

Here is a photo of it... looks good to go as far as i can tell. http://a7.sphotos.ak.fbcdn.net/hphotos-ak-ash4/222176_818774442682_39107345_38839801_6225995_n.jpg

I have to go to advance in an hour and see if i can con one of the guys working there to clear my codes via obd2 port and see what happens.

However will that reset the fuel tables and give me a "clean slate"?

miller11386 · « **Reply #34 on:** April 30, 2011, 01:40:28 PM »

Ok Just pulled the codes, and a new one joined the party:

P0087 Fuel rail pressure too low

I cleared the codes and the car leaned back out to its normal state. I talked to my friend there and he noticed that I have black particles on the bumper already from it running rich. So the car is rich.

Now the AFR is jumping around all over the place. Does this mean I have an injector /HPFP issue? Man a log would really help at this point

miller11386 · « **Reply #35 on:** April 30, 2011, 01:55:54 PM »

This code popped when I did a WOT pull with the car.

Is it safe to try to replicate this?

Arabas · « **Reply #36 on:** April 30, 2011, 02:11:42 PM »

Quote from: miller11386 on April 30, 2011, 01:55:54 PM

This code popped when I did a WOT pull with the car.

Is it safe to try to replicate this?

i wouldn't suggest any WOT pulls, unless it is necessary for a log, according to whatever DDM tells you.
With P0087 didn't it go into limp mode? i suppose you lift foot off the gas, otherwise it would go into limp mode.

for what is worth, be patient and don't push it (or even drive it), get in touch with ddm as soon as they are available, find an hpt tuner and keep in touch with ddm to check the tune.
check anything u can by yourself (clamps, hoses, exhaust leaks, gas around the hpfp, turbo leaks etc)

miller11386 · « **Reply #37 on:** April 30, 2011, 02:27:50 PM »

No limp mode yet. I have not had any restrictions... which kind of makes me nervous!

I plan on parking it for now. I will already need to get the car buffed to get all these black specks out of my freshly painted bumper.

shabby · « **Reply #38 on:** April 30, 2011, 03:05:32 PM »

Hptuners can log fuel pressure, you'd be able to see exactly where its possibly dipping.

miller11386 · « **Reply #39 on:** April 30, 2011, 03:34:20 PM »

Does anyone get a discount on hpt?

idkfa · « **Reply #40 on:** April 30, 2011, 03:53:14 PM »

I bought mine used for like $250 and then picked up some credits for my 06 sol. Don't think you can beat that price

Critterman · « **Reply #41 on:** April 30, 2011, 07:56:03 PM »

Redline right? Every GXP/Redline I have ever seen has carbon flecks on the back off the car, it is the nature of the beast. And I will say this again all Direct Injection engines run leaner because they spray directly in to the cylinder at the exact moment of the spark and do not need as much fuel as one that spits into the airflow going into the cylinder.

A wide band O2 sensor will bounce around at an idle becuase the ECU is is constantly adjusting the fuel flow. Those of you with dashhawks set your unit to read both of your O2 sensors and watch how the voltage bounces around as the ecu adjusts the fuel.

Once you step on it you should have a steady reading but never at an idle. I would drive the car gently until you can get this all figured out.

miller11386 · « **Reply #42 on:** April 30, 2011, 08:36:14 PM »

When my codes were reset and I started my car it sat dead flat at 14.7afr. On the drive back home it still ran rich at 13.2.

It's sitting until I figure out what is going on

miller11386 · « **Reply #43 on:** May 01, 2011, 05:03:03 PM »

Ok,

Here is a video from the other day when I drove the car. Probably worthless, but at least it gives an idea of what I am looking at.

First video is sitting at idle not moving. Second video is just cruising along.The SES light is on at that point for a P0087 Low fuel rail pressure.

http://www.youtube.com/watch?v=6LcPch2Htf4

http://www.youtube.com/watch?v=NY8H4AqAAkU

shabby · « **Reply #44 on:** May 01, 2011, 06:52:27 PM »

That's not right at all, either there's a mistake in the lambda table or you have a massive boost leak and the ecm cant compensate enough, but with the dyno you posted i doubt that's the issue. I wonder how your fuel trims look like.

miller11386 · « **Reply #45 on:** May 01, 2011, 10:50:10 PM »

Is it possible I have an injector or hpfp issue? I just can't imagine such a major error in the lambda tables. I will be looking for more boost leaks tomorrow after I talk to dave again.

Would the Ecu know if an injector was failing? Or if there was a hpfp issue? I would have thought it would throw some kind of code for that if it were the case. But at this point im grasping for straws.

I started the car today to leave and th fuel ratio was all over. I didn't even dare drive the car it was so bad. The car was very choppy and th fuel ratios were all over from 16s to 12s.

shabby · « **Reply #46 on:** May 01, 2011, 11:18:47 PM »

The lambda tables have 4 columns, if you change the first column it'll change your idle/cruising afr, so if your afr is always 13:1 then its a possibility.
Again im just guessing here, with out a log this is all pointless. Don't post here again until you talk to ddm

SKY888 · « **Reply #47 on:** May 02, 2011, 06:14:39 AM »

Quote from: miller11386 on May 01, 2011, 10:50:10 PM

I started the car today to leave and th fuel ratio was all over. I didn't even dare drive the car it was so bad. The car was very choppy and th fuel ratios were all over from 16s to 12s.

you might also have throttle body issues?

or simply a big boost leak somewhere?

miller11386 · « **Reply #48 on:** May 09, 2011, 06:29:00 PM »

Talked to Dave @ DDM a few times, but still have the running rich problem.

checked hoses, MAP sensors, BOV's, MAF sensor, O2 Sensor, etc.

Does anyone have ideas on how to tell if my ECU is failing? I have been trying to research my way out of this issue, but I cannot seem to find anything. Any help would be fantastic.

Gentleman Jack · « **Reply #49 on:** May 10, 2011, 12:53:48 AM »

I would think you should get the car to DDM somehow. Seems best to let them diagnose?

Any way to do that? Truck and trailer?

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Author Topic: Help! Running rich after New GT 2871 and DDM tune (Read 49595 times)