TDStuart Tuning Adventure

[tdstuart]

On HP it is called "cyl air filter"

I'm dealing with 3 versions of software and I learned on HP so the terms sometimes escape me.

Its all good, I'm new and I don't know 90% of the terms lol

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[tdstuart]

I have experienced turning off cylair filter makes the car run like shit. Having cylair anticipation off seems to be fine though. But like K4 mentioned I am unfamiliar with PCMtec terminology as well. I may have forgotten or missed it are you on e85?

On 91 right now to make everything easier.

Ya its Cylair Filter on hptuners

Look at the description for cylair anticipation:

And if we look at the description of the cylair filter on hptuners:

Looks like I should try to leave the filter (ARCH) enabled and disable the anticipation. According to pcmtec disabling the filter (ARCH) disables anticipation too.

 

[Pistol_91]

On 91 right now to make everything easier.

Ya its Cylair Filter on hptuners

Look at the description for cylair anticipation:

And if we look at the description of the cylair filter on hptuners:

Looks like I should try to leave the filter (ARCH) enabled and disable the anticipation. According to pcmtec disabling the filter (ARCH) disables anticipation too.

I would try that.

 

[markmurfie]

On HP it is called "cyl air filter"

I'm dealing with 3 versions of software and I learned on HP so the terms sometimes escape me.

Yeah who knows why they choose the names and abriviations as they all do.

Angle which IMRC is considered in the open/ closed positions are labeled backwards between HPT and PCM... whos right? IDK

The filter uses both the speed density airmass and the cylinder airmass given directly by the MAF so everything is smoother. This allows the anticipation logic to work, speeding up the reported MAF values durring transient manifold filling and unfilling conditions, where MAF sensors have the largest error with no correction. That was my basic understanding. How its causing an offset in load at steady state high throttle positions im not sure.

I would add calculated mainfold absolute pressure to the logs and see what values it says are at WOT with the ARCH filter on and off. Maybe you are hitting a SD MAP limit some how.
I would also see if you can add TPS voltages. Only because I think throttle angle can misreport how open your throttle blade actually is.

 

[tdstuart]

I would add calculated mainfold absolute pressure to the logs and see what values it says are at WOT with the ARCH filter on and off. Maybe you are hitting a SD MAP limit some how.
I would also see if you can add TPS voltages. Only because I think throttle angle can misreport how open your throttle blade actually is.

I'll try this but I also want to try disabling the anticipation and see if just the anticipation off will do the same thing.

 

[Pistol_91]

I'll try this but I also want to try disabling the anticipation and see if just the anticipation off will do the same thing.

If I had to guess its not going to change anything

 

[tdstuart]

Thoughts on me putting the stock cai and injectors back on?

And if I do what should the order of operations be? Put the car to stock figure out how off the fuel trims are. Then put on the pmas cai and adjust? Then put on the lu47 injectors and adjust?

Or I could go stock cai stock injectors figure out the trims, then put the lu47 injectors and adjust the data then put the pmas on and adjust the maf.

The problem is I think we might just have to settle for injector data that is not perfect and adjust the maf to match because I don't know how easy it will be to adjust the injector data.

 

[markmurfie]

limited air load air mass values come out to 22-23 inHg MAP
MAF mass values come out to 27-28 inHg MAP.
Shouldn't be a SD limit to Manifold Absolute Pressure, But if the Throttle Body is being told its only opening to like 60* when its actually at 85*, it could limit it to a lower MAP pressure needed to meet the airflow through that effective area.

I think the PMAS MAF transfer is fine.
I also think the Roush injector data is fine.

What ever is causing this MAF and load difference is a major problem causing it to run lean at WOT. I dont think adjusting the MAF or injector data will get around this.

 

[Pistol_91]

limited air load air mass values come out to 22-23 inHg MAP
MAF mass values come out to 27-28 inHg MAP.
Shouldn't be a SD limit to Manifold Absolute Pressure, But if the Throttle Body is being told its only opening to like 60* when its actually at 85*, it could limit it to a lower MAP pressure needed to meet the airflow through that effective area.

I think the PMAS MAF transfer is fine.
I also think the Roush injector data is fine.

What ever is causing this MAF and load difference is a major problem causing it to run lean at WOT. I dont think adjusting the MAF or injector data will get around this.

Possible IMRC issues?

 

[markmurfie]

Possible IMRC issues?

Maybe but the voltages for those positions are reporting correctly.

The only other issue I can think of would be the supplied DW 1/8” hose onto the venturi inlet receptacle of the assembly bucket for the DW400 pump came off and its leaking fuel pressure.

https://latemodel.cachefly.net/downloads/instructions/15-17DW400 FuelPump nstallInstructions_2.pdf

If the venturi hose you have on your DW400 is black like in this instructions it should be replaced.

https://deatschwerks.com/products/9-1047

This hard plastic tube should be used as it remains secured to the pump and bucket much better.

 

[tdstuart]

Maybe but the voltages for those positions are reporting correctly.

The only other issue I can think of would be the supplied DW 1/8” hose onto the venturi inlet receptacle of the assembly bucket for the DW400 pump came off and its leaking fuel pressure.

https://latemodel.cachefly.net/downloads/instructions/15-17DW400 FuelPump nstallInstructions_2.pdf

If the venturi hose you have on your DW400 is black like in this instructions it should be replaced.

https://deatschwerks.com/products/9-1047

This hard plastic tube should be used as it remains secured to the pump and bucket much better.

I got mine fairly recently and I think its the plastic one as I remember the two being very similar the small one was just much harder to get on

The lund version I am running is like R1 that they fixed my paddle shifting issue on. So I don't think lund is seeing this issue and putting a bandaid on it. So maybe its just a tune issue I need to account for?

 

[GregO]

@tdstuart
What direction do you have the MAF sensor clocked to ?
Here’s Terry’s post a few years back regarding the then newly released PMAS fender well kit. Keep in mind this is with the fog light installed and no melted holes in the inner fender well from 305 tires like your car has.

 

[tdstuart]

@tdstuart
What direction do you have the MAF sensor clocked to ?
Here’s Terry’s post a few years back regarding the then newly released PMAS fender well kit. Keep in mind this is with the fog light installed and no melted holes in the inner fender well from 305 tires like your car has.

I just don’t know what he means by clocked towards the engine. Like the maf connector facing towards the engine or it facing backwards towards the car. Because pmaf instructions has it facing towards the car.

Like if the front of the car is North and rear is South the maf is facing directly South from what I’ve seen with PMAS. I don’t know if terry means that or pointing like SE towards the engine.

 

[GregO]

I just don’t know what he means by clocked towards the engine. Like the maf connector facing towards the engine or it facing backwards towards the car. Because pmaf instructions has it facing towards the car.

Like if the front of the car is North and rear is South the maf is facing directly South from what I’ve seen with PMAS. I don’t know if terry means that or pointing like SE towards the engine.

I interpret this as the MAF housing slot (not the sensor air slot) is facing towards the inside. Not front, back or outside.

 

[tdstuart]

I interpret this as the MAF housing slot is facing towards the inside. Not front, back or outside.

So in my example to maf slot would be pointed east?

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