Anybody using the new beta and having trouble with Power Enrichment?

[IDRIVEAG8GT]

Like the title says, running new beta, now my PE seems to take forever to kick in and the car lean pops, and O2's hit the floor then after about 500 rpm of change it enters PE and performs. WTF?

It's a MAF tune but never had this issue until the new beta. I was just trying to get some low end STFT's to clean up and then it went to crap.

Anyone had an issue like this before?

All my delays, and hysteris values are zeroed out, as it only relies on the MAP kPa to enable PE.

Fuel multiplier is set at 1.250 in PE, MAP Enable set at 88 kPa right before boost comes in.

Running closed loop fueling, no PE in the area that it was going lean, STFT's show -4/-6% so I know it's not too lean in that portion of the MAF table.

[Bill@HPTuners]

Likely has 0 to do with running a beta. Maybe post your scanner log & .hpt file as well as any dtc's you might be getting.

[G_OCHO]

I have been using since August. My scans show the PE coming in exactly to where expected for where my parameters for TPS, MAP and RPM are set. This is on '09 G8 , cam and exhaust mods.

[Throttle]

same here mine works fine i have had beta for a while helps when tunes are posted also.

[IDRIVEAG8GT]

Here's a tune and log for you guys.

The best examples start at frame 3520, you can see that the car enters Open Loop fueling and commands power enrichment but the O2's just hit the floor.

And no it is not my fuel pump either, It's a ZL1 swapped pump with a KB Boost-A-Pump on top of it, and injectors are LS9's with reformatted data for this application.

I've tried to add as much as 25% airflow to the problem area with no such help, and I've also taken 25% away thinking that it may have been rich burping.

I noticed that it blows some big fireballs whenever you stand on it and it pops/hesitates/coughs. Weird.

[IDRIVEAG8GT]

Likely has 0 to do with running a beta. Maybe post your scanner log & .hpt file as well as any dtc's you might be getting.

I hope not, it was just strange having this start right as soon as I tuned with the new beta on the standard OS. You guys are doing awesome work, and I'm not knocking you in any way.

Who knows, maybe it's something I flubbed up but I can't find it!

[Pekka_Perkeles]

Strange, I had bit similar issues just recently. PE not affecting AFR at all. This was with Gen 4 & MAF and later with different laptop, same problem with Gen 3 with 2 bar CoS.

Too bad the tune and logs in both cases are with customers, so I can't prove anything. Maybe it was just something I missed with the tune. :-(

[IDRIVEAG8GT]

I know. Isn't it weird? It's like it's delayed for some reason. I wonder if I need to check up on my OL tables and see if it's commanding a weird value for some reason.

[planethax]

Probably won't help but weirder thing have happened, maybe try a write entire ?

[IDRIVEAG8GT]

Probably won't help but weirder thing have happened, maybe try a write entire ?

Tried twice! no change.

[IDRIVEAG8GT]

Agh WTF!, so today I jumped on it at about 2,500 rpm and the car started pulling a tiny bit, then all the sudden it just went nuts after about a 500 rpm climb and .

It just was lean, then the fuel enriched and it took off. Kind of felt like I had a turbocharger for a bit, but the car is supercharged lol.

[DSteck]

Sure your pump is functioning properly? Add injector pulse width to your log.

[IDRIVEAG8GT]

Sure your pump is functioning properly? Add injector pulse width to your log.

Yep, got 58 psi at the rails no matter what.

And ok can do.

I made the problem much better by adding a ton to the MAF from idle all the way up to 7,000 HZ but now the ST's are around -20% just cruising around town so it is definitely lean.

I'll add PW and take another log tomorrow.

[Bill@HPTuners]

not sure if it has anything to do with your issue or not but your vehicle speed is reading 0mph the entire log.

[IDRIVEAG8GT]

That's because the vehicle never moved.

[bearbear3_4]

Did you ever figure this out? I had almost then same thing happen to me at the track. When going into PE it would go crazy lean but was fine out of PE or with PE disabled.

[IDRIVEAG8GT]

Yeah I actually have been increasing the numbers in the transient base multiplier tables quite a bit to bring things in line. It works perfectly.

[FASSTRUK]

Similar thing with me...wot delayed or stumbled for a second, then kicked in. It happened when I was trying to pass someone on the highway. It's a 2008 tbss.

[IDRIVEAG8GT]

No doubt there's a few quirks with the new beta but nothing that can't be overcome with simple tuning.

[10_SS]

I've been seeing PE delay I cant figure out as well, but it also seems to be the first time I'm really looking at it as I just put a Whipple on.

How sure are you guys that this is a new problem? Do you have before/after datalogs of quick WOT pedal smacking that you can post, or post some before/after logs?

I've actually resorted to slowing down the Throttle opening rates to stop a lean problem from occuring (it's a supercharger and when I smack the throttle at high RPM with 100% throttle opening rates I get burts/spikes of airflow and the MAP takes a bit to respond so it runs lean and knocks, but even when the MAP does catch up it reads up to 185kPa and doesnt enable PE!), but this might be just the way the PCM is, Im not sure.