pig rich when in boost...need help asap

[19trans_am98]

i just converted my OS to the 2 bar OS and cannot get the scanner to read anything over 105kpa ive tried the gm 2 bar pid and still nothing....even on rtt it doesnt read over 105 kpa....and when car goes into boost it goes dead rich any ideas? ill post up tune and scanner config...im bout to pull my hair out trying to get this thing right

it is a 5.3 with 76mm turbo...60lb injectors and a boost ref. reg. with base pressure of 60psi in a 88 mustang coupe

[TXZ0603]

Have you installed a 2 bar map? If so are you SURE its a 2bar map?

[smithers]

x 2 - which 2 bar sensor are you using?

[Ben Charles]

does the OS say 105 map or 210?

[smithers]

does the OS say 105 map or 210?

If you took the time to open his file he posted, you would see that the horrible spiky calibrated VE table goes to 210 and you would also notice the 2 BAR OS is applied. ... but you still need the SENSOR capable to measuring that range.

Our two posts are suggesting, since it pegs at 105kpa, that its possible, 19trans_am98, is not aware that more is required when going to a 2 BAR OS., and also needs to re-work his awful looking VE table.

It states right in HPTUNERS HELP:
NOTE: You must use a correctly calibrated 2bar MAP sensor for this application. The default MAP sensor calibration values may not be accurate for your MAP sensor.

[smithers]

PE Enable is not setup for the mods.
PE Enable TPS is dangerously high for a turbo, Im sure Boost is before 80% throttle! And if you dont enter PE, you dont trigger BE, regardless if your above the BE Enable... (not a good situation)
Should change your Enrichment rate to 4.0

Not sure, but Ive read other posts regarding the transition from PE to BE not being smooth and contain lean spikes... thus should match PE EQ vs RPM with BE EQ table... even though the ECM takes the richer of the two. You may want to do some searches on that.

Are you not getting a P0068 code? you will when you put in a 2 bar sensor.
Your calculated airflow table looks low and stock and needs to be altered.
Your p0106 MAP Table is stock and will throw a code and go into limp mode (power reduction) when you decide to buy a 2 BAR sensor and go over 105kpa.

And you should fail your MAF using
0 - Mil on first error and Uncheck SES Enable for P0101, P0102, P0103.

You will have a mean machine when this is all tweaked up!

[19trans_am98]

it is a 2 bar sensor....i used it in my 98 trans am and it worked fine....just cant seem to get the scanner to read boost...and as soon as it hits boost it floods like hell... still working on tune...kinda my first rodeo

[smithers]

Good to check if your running a 5 volt MAP sensor

Yea, that's because you will trip P0106 MAP Diagnostic ... and will go into reduce power mode. part of the several things i mentioned for you to look at.
at various throttle positions its set at 105KPA... (which is slight boost as sea level ave is 101.3kpa)

You should be throwing codes!

Again:
1. your calculated Airflow table is low and looks stock, this needs to be altered
2. Your P0106 Map table is also stock and doesnt allow any boost as its limit it set at 105

[19trans_am98]

i changed the p0106 table but didnt see the calculated airflow table

[19trans_am98]

ok map sensor part # is 12615136 AcDelco.....still not getting the scanner to read boost can any one look at the scanner config and tell me what im doing wrong....this is driving me crazy

[smithers]

Where are your logs, really need to see a log here...
Do you have any codes being thrown? DTCs? when hitting this magical no boost?
Do you have a means to measure the Vac/boost other than the scanner?

Verify you dont have 1bar PIDs in there.. and are using the 2Bar MAP PID.

Your P0106 Error Map Max table is wrong, Im sure with a turbo you would go into boost at 2400 rpm anywhere up to 100% throttle... I readjusted, Import the txt data.

Your Calculated Airflow vs TPS vs RPM (p1514) is under Engine Diagonstics >> General >> TPS Sensor, double the entire table for now.. but you should log and adjust accordingly as these are safety features...Attachment 29148

These are mandatory regardless if you can read boost or not in your scan... as you would enter reduced power mode.

[CancerJCC]

FYI Custom PID's used to read boost psi etc will cause your MAP reading to be incorrect. It happened to me and after searching I'm not the only one. To fix you need to start out with a stock configuration that doesn't have any custom PID's you created. Good luck I know its frustrating.

[The Alchemist]

I just had this problem this morning and just now realized that the PID for the map sensor needs to be deleted and the 2-bar one needs to be added. It should look like this.

[LSxpwrdZ]

Is this Jordan?

You need to delete the normal MAP sensor and add back the 2bar MAP sensor to get it to log right.

[19trans_am98]

yea this is jordan....ill try that and see what happens i havent messed with the car in about 3 weeks just been so frustrated with it...james i may be making an appointment for a tune here in a few months this thing is driving me nuts

[LSxpwrdZ]

Sounds good bud, just let me know and I'll get ya worked out!