Lamda issues after speedtech install

[Bmxr152]

So I have the speedtech kit installed and a basic tune from v8bait to get me going. I'm running brand new ntk sensors. Injectors are index 12 and brand new. The issue I see which I never had with the twins is that bank 1 lamda sensor is jumpy and not flat. Bank 2 is similar but not nearly as bad. Anyone have any ideas? Maybe ignition related?

datazap.me | Bmxr152 | Speedtech kit

datazap.me

 

[langsbr]

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[iminhell1]

Lean spool is active, spool mode in general
LPFP is varying too much IMO


It's a base tune. Talk to V8Bait and he'll make adjustments as to what he see's. It's not our place to step on his toes.

 

[Bmxr152]

Yeah I messaged him about it, I was just trying to see if it was something with the install or ntk sensors. Just waiting for a reply from him. I saw the lpfp jumping around, just confused as to what was causing that.

 

[iminhell1]

Yeah I messaged him about it, I was just trying to see if it was something with the install or ntk sensors. Just waiting for a reply from him. I saw the lpfp jumping around, just confused as to what was causing that.

Not enough LPFP. Controller maxing out and dropping. Generally it's a supply issue.

 

[Bmxr152]

Not enough LPFP. Controller maxing out and dropping. Generally it's a supply issue.

Hmm that's weird, the fuel pump is a fuel it stage 2 Wally 450. Only has about 6k miles on it. Maybe I need a second pump or new ekpm?

 

[iminhell1]

IMO, anything going for power on any E fuel, needs 2 pumps.

 

[Bmxr152]

IMO, anything going for power on any E fuel, needs 2 pumps.

Yeah very true, but I'm running 98 octane with no meth in this pull. I wasnt planning on running ethanol. Our sources down here in west texas are anywhere from e30 to e90 so it's a constant game

 

[WOT808]

So I have the speedtech kit installed and a basic tune from v8bait to get me going. I'm running brand new ntk sensors. Injectors are index 12 and brand new. The issue I see which I never had with the twins is that bank 1 lamda sensor is jumpy and not flat. Bank 2 is similar but not nearly as bad. Anyone have any ideas? Maybe ignition related?

datazap.me | Bmxr152 | Speedtech kit

datazap.me

I have a SpeedTech Kit. Bank 1 AFR behaves similar to yours (spikey). I've used 3 different OE o2s and a set of new index 12 Injectors with the same results.
I've witnessed the behavior with my PI off.
Not sure of the exact verbiage but the SpeedTech install manual warns us about spikey AFR readings even after the o2 tables are changed in the tune.
Recently ordered ADV sensors after conversations with Jeff. I'll give this thread an update once the ADVs are installed.

 

[JimboFresh206]

I would definitely go with the ADVs, but find the appropriate connecter instead of splicing them. Kind of hard to see but they are right there by the Mac valve.

Once it warms up a bit I'll go out and get the PN.

Also make sure there isn't any coating where the 02s crush washer seats to ensure a good ground

 

[Bmxr152]

Okay, I was hoping the ntk sensors would be fine after all the praise I've been reading about them. Maybe something to do with the speedtech design? I probly should grind off some of the ceramic coating on the crush surface however.

 

[iminhell1]

I didn't go ADV because I'd found mixed reviews, more bad than good in recent time.
I got Tony's spacers if need be. Too much heat is the killer far as i understood.

 

[Twisted Tuning]

I'm sure Justin knows, but make sure the pressure correction maps are adjusted.

 

[JimboFresh206]

the VTT heatsinks dont fit the Speedtech manifold. that was my original game plan. The tip of the heat-sink/spacer interferes with the manifold so they wont thread all the way down.

Im at 15k with zero issues on my ADV's from Jeff, and tuned by Jake.H at Motiv. Alot of the issues people ahve are due to the splices.

The 02s readings are based on resistance, solder adds that.. use the correct terminal's/plug housings and be happy like me

 

[Bmxr152]

Yesterday I tried swapping coils around and installing new plugs gapped @ .020. I made sure there was no ceramic coating on the o2 sensor mating surface as well. Nothing changed the readings. I was told by Jeff at speedtech that it is caused by not having the ADV sensors, i have also been told by the tuner that it is caused by missfires. Maybe a carbon buildup issue on valves, i know i need to clean them just been too busy working on customer cars. lol

 

[Milan]

I don't really see what the issue is in the log? Don't waste your money on the ADV sensors....been there, done that on 2 different cars, they are trash.

 

[Bmxr152]

I don't really see what the issue is in the log? Don't waste your money on the ADV sensors....been there, done that on 2 different cars, they are trash.

Thats what i figured. I've heard more horror stories with the ADV sensors than success stories. If you zoom in on lambda 1 and 2 you can see that 1 is like a saw tooth going from 11.2 to 12.5 where bank 2 is flat. Before the speedtech install with my Chineseium turbos i never had this issue.

 

[Mzfhartge]

Have you upgraded your fuel lines, what pump setup you have? Do you have Pi?
I am in the same boat, going thru o2 sensors bank 1 also on bottom mount.

 

[Bmxr152]

Have you upgraded your fuel lines, what pump setup you have? Do you have Pi?
I am in the same boat, going thru o2 sensors bank 1 also on bottom mount.

Stock fuel lines still. I'm running a single walbro 450 currently with 7gph water meth nozzle located at the intercooler end tank.

 

[Daniel.B]

Having the same problem, just that I am getting misfire on high rpm on bank 1 also.
Have tried all the same stuff. Running brand new OEM 02s. Rear also.