speed6 not hitting boost targets

[tar0s]

my buddy has had his speed6 for a few months now and i've always been a bit disappointed with its performance. i initially attributed this the fact it was AWD and i'm used to a modded speed3. it was purchased used w/ a mazdaspeed cai on it but everything looked and sounded good. it was never as loud spooling as my car but we attributed that to the 'luxury' feel of the car. the car itself is beautiful. i love it, it just felt off.

now i'm thinking i'm disappointed with the performance and sound because it isn't hitting boost targets. not even close. it's on a stage 1 map and peaks at a little over 13 and runs a stable 11lbs at WOT.

he had reflashed it last night and that didn't change anything.

if someone could take a look at the logs and make a few recommendations it'd be awesome!

thanks guys

[rfinkle2]

I would definitely recommend that your friend get on a tuning list (in no particular order)

-@phate and @Bucker
-@atvfreek (freek tunes)
-Perm tuning list

That being said, the first thing that I think you can do safely is raise the throttle requested load - per gear tables (normal bat only) to a value of 2.1 or so from 2500rpm -redline.

[tar0s]

so you're confident it's all in the tune? i should have him flash it stock and get a log of that.

[greenespeed]

Originally Posted by tar0s so you're confident it's all in the tune? i should have him flash it stock and get a log of that.

This sounds like a good idea to me.

[amoosenamedhank]

How does the car drive in vacuum? He could have a boost leak as well.

[rfinkle2]

Looking @ the wgdc, I'm 90% sure it is the tune, although a moosenamedhank could have suggested an additional problem.

[amoosenamedhank]

Originally Posted by rfinkle2 Looking @ the wgdc, I'm 90% sure it is the tune, although a moosenamedhank could have suggested an additional problem.

maybe.... maybe not. I just think it's always a good idea to try and rule out any mechanical issues before you start digging into the tune. Unless it is obviously the tune.

[tar0s]

gotcha. will get a log up tonight. we're stuck at our 9-5's.

[rfinkle2]

Originally Posted by amoosenamedhank maybe.... maybe not. I just think it's always a good idea to try and rule out any mechanical issues before you start digging into the tune. Unless it is obviously the tune.

I'm 90% sure it is the tune.

If you look @ what happens when the load becomes high, the wgdc is hacked down, sometimes to zero.

[greenespeed]

I noticed the WGDCs also but don't know enough about it all to say anything. My initial thought was that it's low all across the board.

[atvfreek]

Speed 6 ots tunes are terrible IMO, but I would still flash to stock and see what happens. I also noticed that the maf cal is off by 12% that would cause an incorrect calc load reading and reduce boost drastically.

[Cobb Tuning]

Originally Posted by tar0s my buddy has had his speed6 for a few months now and i've always been a bit disappointed with its performance. i initially attributed this the fact it was AWD and i'm used to a modded speed3. it was purchased used w/ a mazdaspeed cai on it but everything looked and sounded good. it was never as loud spooling as my car but we attributed that to the 'luxury' feel of the car. the car itself is beautiful. i love it, it just felt off. now i'm thinking i'm disappointed with the performance and sound because it isn't hitting boost targets. not even close. it's on a stage 1 map and peaks at a little over 13 and runs a stable 11lbs at WOT. he had reflashed it last night and that didn't change anything. if someone could take a look at the logs and make a few recommendations it'd be awesome! thanks guys

By the looks of the logs, you can see a few things:

1) The AFR's are inconsistent and lean occasionally going into WOT. A Boost leak somewhere is very possible based on the boost he's getting (only 10PSI)

2) The WGDC logs looks like a classic Boost solenoid issue - be it wiring, vacuum reference lines, or a bent actuator arm.

3) Your MAF volts are telling me that either it isn't scaled right or you have a lot of air not flowing through the MAF - possibly a post MAF air leak as well.

I'd really look into the mechanical health of the car, because those logs are not showing a very healthy setup.

-David@COBB

[ms6forthewin]

i would clean your maf sensor, and recalifbrate.

Before that, check all hardware; clamps, hoses, to see. I would do a boost leak test to see if you're boost leaking. Like what david say, your logs does not look healthy

[BigjohnB20]

Definately take the advice of some of the people above me, (finkle and cobb especially), but to me I see a poorly scaled MAF: -13 LTFT. This appears to be causing an inflated reported load and g/sec readings. If you scale the load values down 13% you end up holding about 1.6 after your initial spike. If I recall, most of teh stage one OTS maps target right around that load. Currently in stock and OTS form (MS6 at least) the car is targeting a load value, not boost. If you are at your load target, the car doesn't really care what the boost is. 15 or 10 psi doesn't matter.

To me, if you had a post turbo leak, I would expect higher WGDC as the car tries to push more boost/load to compensate for the leak.

So, to reiterate what others have said, first make sure you are in good mechanical order. After that you need to do a proper MAF cal and then go in and either up the load targets or switch to boost tuning and up those targets. Good luck and dont' blow it up, lol

[rfinkle2]

Originally Posted by BigjohnB20 Definately take the advice of some of the people above me, (finkle and cobb especially), but to me I see a poorly scaled MAF: -13 LTFT. This appears to be causing an inflated reported load and g/sec readings. If you scale the load values down 13% you end up holding about 1.6 after your initial spike. If I recall, most of teh stage one OTS maps target right around that load. Currently in stock and OTS form (MS6 at least) the car is targeting a load value, not boost. If you are at your load target, the car doesn't really care what the boost is. 15 or 10 psi doesn't matter. To me, if you had a post turbo leak, I would expect higher WGDC as the car tries to push more boost/load to compensate for the leak. So, to reiterate what others have said, first make sure you are in good mechanical order. After that you need to do a proper MAF cal and then go in and either up the load targets or switch to boost tuning and up those targets. Good luck and dont' blow it up, lol

If all of the suggestions in the thread are looked @, there is no doubt the car can pick up some power.

Atvfreek has helped me quite a few times, so don't dismiss his advice.

[Bucker]

I am 99% on the Load error comp table being an issue here. My first step would be to tear the entire intake system down to the Throttle body and make sure it is put back together properly, then jump on the tune. It needs a MAF cal and an actual tune.

[tar0s]

awesome info all around. he wasn't able to do a stock tuned log last night. thank you all (cobb is freakin' awesome for reaching out) and we'll definitely keep everyone posted.

i'm sure i'm not the only one who's upset about a speed6 not feeling too well. :p

[tar0s]

we're gonna take the intake completely off, clean the sensor / filter tomorrow night.

anything else you guys suggest we check while at the shop?

[rfinkle2]

With a car that has had a turbo underhood for years, all vacuum hoses and boost related hoses are suspect.

Once you get everything worked out mechanically...

Do an maf calibration and focus your initial efforts on the trl - x gear (norm bat) tables.

[tar0s]

Alright! So they got the sensor cleared out (had a nice layer of dust), double checked all the clamps, peeked in on the filter and my god was that dirty. they dusted it off and he's gonna be ordering a new one but it should last.

Also uninstalled / reinstalled the AP with the latest firmware, he got it flashed to the mazdaspeed cai 2 map (with air straightener) and my god is are the logs better.

night and day.

thanks all for the quick support and ideas. think this is a mix of car needing some loving and getting the right map on there.

[rfinkle2]

Is he still getting a surging feeling?

[tar0s]

how do you mean? i've heard nothing bad, only that it's much more responsive.

[rfinkle2]

I see in his logs a few times where his wgdc is cut down pretty substantially (not in between shifts).

I'm surprised he didn't mention a studdering feeling.