Turbo missing under load

[Jeff]

So I have a bunch if missing under load on the e36. Found out I didn't hook my wastegate up correctly had the line on the wrong port. Fixed that now have about 10-12psi sweet right well no!

It misses from 3200-5000 my afr goes to 9:1-9:5 5000 it stops missing and shoots to 12:1-13:1 not good plenty of power after it stops missing. What causes the missing? Fixes? Suggestion?

[frcefed]

I'm not well educated in turbos but it seems to me like 9:1 would drown your cylinders in gas. The lowest reading you should have from your afr is like 11:1 and up. What are you running for fuel management?

[suspenceful]

Yep, you're running rich.

What are you using to tune it?

[Earl]

He has a Miller War chip iirc

[B C]

Jeff likes to complain about how rich he is

[Rowleym]

Definitely too rich causing a misfire. 

[Narcosis]

How do your plugs look & what are they gapped at?  DId you turbocharge an N/A car?  If so, is the tune an piggy back / drop in or did someone actually tune the car?  Can you datalog the car?

[frcefed]

Does the war chip adjust for fuel as rpms increase? Or do you have seperate fuel management?

[B C]

The extra fuel is manually entered into the fueling table.

As a side note, Load (ms) is immensely confusing

 

[frcefed]

So then you can change it to give you less fuel, right?

[Rowleym]

So then you can change it to give you less fuel, right?

yes very easily

[Rowleym]

The extra fuel is manually entered into the fueling table.

As a side note, Load (ms) is immensely confusing

 

Because we always measure load in milliseconds right?

[B C]

According to Brody @ Miller, it made the most sense for how they set things up (apparently its injector pw). They would know better than we would, but regardless having TPS or MAP on the load axis makes it immensely easier to diagnose and tune since if you have a rich spot that occurs around 4000 rpm and 10psi, you can convert 10psi to kPa and take a look at the fueling table real easily. 

[Jeff]

According to Brody @ Miller, it made the most sense for how they set things up (apparently its injector pw). They would know better than we would, but regardless having TPS or MAP on the load axis makes it immensely easier to diagnose and tune since if you have a rich spot that occurs around 4000 rpm and 10psi, you can convert 10psi to kPa and take a look at the fueling table real easily.

Tune my car for me

Re gapped the plugs to .22 was over .35? No good

Miller blows don't care for it.

Time to re tune it hard when it's missing and hoes from rich to lean in a second.

[B C]

over .035"?  thats pretty wide. 

I have mine set to 0.027" right now 1 heat range colder than stock  (NGK 6) 

[lagwagon]

9:1 isn't going to cause a misfire. My turbo car very briefly sees 8.5:1 at toe-in and I haven't bothered to tune it out. Also running the miller war chip.

Is it consistent?
Stock fuel pump?

What engine? 

Perhaps I could send you my tune to try but my car runs a little different than most. 

My advice is to load the base map and work from scratch. Adjusting the timing is not the right thing to do here despite above advice. There's a 99% chance this is mechanical and not tune related. I would start with trying another TPS. Check MAF voltages for proper readings and try different plugs. 

Personally I have this same exact issue when cold because I run hot plugs (forget exact model right now, though, sorry) 

[Jeff]

300lph fuel pump it's pretty consistent I have the m50 . I know my injectors are small but shouldn't miss and still have that much fuel.

[lagwagon]

Wait, if I'm understanding this correctly - you are running the war chip and stock injectors with the miller maf? Are you using the M50 base tune and then tuning to the turbo? 

[Jeff]

#24 injectors and using a 24 injector tune and changing it for the turbo stock maf. Need to Chang it

[B C]

24#ers are probably only going to support 8psi max before the duty cycle gets craycray. I bump 100% duty cycle at 12psi on 33#  injectors @43.5psi fuel pressure

[lagwagon]

You are just going to pop that motor unless you get a proper tune in there. Get the miller maf ($300) and 60# siemens injectors ($220) and start with the base tune. It will probably solve all of your problems unless you have some underlying mechanical issues like the TPS 

[Jeff]

We'll understanding that my injectors are tiny it has been like this for over a year now no popped motor yet.

I do agree in need to upgrade the injectors at least.

I did figure out my issue though I loaded the wrong file into the chip. Have to tweak the tune in higher rpm at wot but back to the normal afr'a of 10.5-11 untill 5k where it goes to 12.5-13

[Rowleym]

24#ers are probably only going to support 8psi max before the duty cycle gets craycray. I bump 100% duty cycle at 12psi on 33#  injectors @43.5psi fuel pressure

 

24#ers are probably only going to support 8psi max before the duty cycle gets craycray. I bump 100% duty cycle at 12psi on 33#  injectors @43.5psi fuel pressure

This. Im surprised you can even run lean with the injectors wide open and 10-12PSI. 

You should just buy my ms3x and be done with this war chip nonsense  

[B C]

I completely agree.

 

He is saving up for a bridgeport, 

 

something about a cordless drill welded to a tripod "isnt quite good enough"

 

 

snobs. 

[Jeff]

Lol damn right I may look and and see if I can find a used set of injectors ans long as I can get the tune for them

[B C]

http://maksinjection.com/?product=bosch-0280-155-737-33-white