Need Help with scanner values [Archive] - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum

: Need Help with scanner values


babonji
08-13-2011, 06:24 PM
my car is Envoy 2002
the scanner is innova 360

ihave those values

so i need to know the normal value must be between

---------------------------------------------------
Fuel Sys 1 __________ CL
CALC Load (%) _______ 35.2
ECT (F)______________ 181
STFT B1 (%)________ -3 ~ -13
LTFT B1 (%)________ 21.8
MAP ( inHG )__________ 9.1 ~ 11.5
Eng RPM _____________ 907
Spark ADV (ْ) ________ 7 ~ 19
IAT (F) ______________ 156
TPS (%) _____________ 8 ~ 12.9
O2S B1 S1 (V)_______ 0.850
STFT B1 S1 (%)_______ - 10.9 ~ 0
O2S B1 S2 (V)________ 0.700
STFT B1 S2___________ NA
MIL DIs ( Mile )________ 0

-------------------------------------------
what are the normal values for all

and (CAT) Catalyst Monitor blinking always

thanks

Ralph_T
08-13-2011, 07:28 PM
I started using scan tool software myself. I know a little bit as follows. Hope this helps.

my car is Envoy 2002
the scanner is innova 360

ihave those values

so i need to know the normal value must be between

---------------------------------------------------
Fuel Sys 1 __________ CL (closed/open loop)
CALC Load (%) _______ 35.2 (normal dep on engine speed and throttle position and map values)
ECT (F)______________ 181 (engine coolant temp. this is low if your vehicle is fully warmed up. Normal if just starting to warm up. It should be around 195F at full operating temp.
STFT B1 (%)________ -3 ~ -13 (short term fuel trim)
LTFT B1 (%)________ 21.8 (llong term fuel trim)
MAP ( inHG )__________ 9.1 ~ 11.5 (this is absolute pressure not vaccum. Atmospheric pressure 29.5 minus engine vaccum ~21. You should have 8-8.5 Hg at idle)
Eng RPM _____________ 907 (normal if off idle. Idle should be 600-650 rpm)
Spark ADV (ْ) ________ 7 ~ 19
IAT (F) ______________ 156 (this seems high but then again my IAT is at 130F at idle and fully warmed up. We need to investigate this)
TPS (%) _____________ 8 ~ 12.9 (This looks normal. However on my Envoy I see my throttle position at idle is at 32%. I need to investigate this more)
O2S B1 S1 (V)_______ 0.850 (Looks ok but you need to check when this goes high and then low to see if the O2 is reacting to the injector pulses. Need an O-scope or chart view to see changes over time)
STFT B1 S1 (%)_______ - 10.9 ~ 0 ??
O2S B1 S2 (V)________ 0.700 ??
STFT B1 S2___________ NA
MIL DIs ( Mile )________ 0 (No Check engine lights)

-------------------------------------------
what are the normal values for all

and (CAT) Catalyst Monitor blinking always

thanks

Need to the check engine light codes for the catalyst. Is it P0420??

babonji
08-13-2011, 07:43 PM
thanks very helpfull


STFT B1 (%)________ -3 ~ -13 (short term fuel trim)( is this Normal value? )

no it is not P0420


i have P0300 code
and P0171

Ralph_T
08-13-2011, 07:55 PM
thanks very helpfull


STFT B1 (%)________ -3 ~ -13 (short term fuel trim)( is this Normal value? )

no it is not P0420


i have P0300 code
and P0171

These are for a random misfire and O2 lean. You want to check for a vacuum leak.

babonji
08-13-2011, 08:33 PM
thanks i will



how to decrease Engine RPM

Ralph_T
08-13-2011, 09:03 PM
how to decrease Engine RPM

I am guessing there was supposed to be a ? mark after that. Well if you fix the vacuum leak the engine will calm down.

babonji
08-14-2011, 10:32 PM
I am testing the vacuum leak
what parts should i spray on?

Any diagram od pic pls?

Ralph_T
08-15-2011, 10:20 AM
I am testing the vacuum leak
what parts should i spray on?

Any diagram od pic pls?

You first step is to connect a vacuum guage to see if you really have a leak. Let us know what the reading is at idle.