I have a 2005 Trailblazer w/ 4.2 I6... MIL came on with a P0171 system too lean bank 1 code. Also had 2 pending codes: P0131 O2 sensor circuit low and P1133 heated O2 sensor insufficient switching bank 1 sensor 1.
I have had a gurgling noise coming out of the air intake, have worked my way down to determining the secondary air diverter valve is stuck open, and the gurgling noise is exhaust being pushed backwards through AIR pump and up into the intake... Plan on putting a new diverter valve on this weekend.
I pulled PIDs at IDLE (900rpm) and in PARK after driving for half hour..
FUELSYS1----OL FAULT
LOAD_PCT(%)----- 39.2
ECT (F)----------179
SHRTFT(%)------0.0
LONGFT(%)------21.9
MAP (PSI)-------5.4
RPM--------------903
SPARKADV-------14.5
IAT(F)------------55
TP%--------------17.6
AIR_STAT--------OFF
O2B1S1(V)------0.005
O2B1S2(V)------0.970
Do any of those seem unusual? I also had scanner hooked up as I was driving, and noticed that at the slightest touch of the gas pedal the LOAD_PCT pid would jump way up. At idle and in gear like at a light, the LOAD_PCT hovered between 40 and 45.
I disconnected the tube from the diverter valve to the pump at the pump and had exhaust coming out.
Any help is much appreciated.
I have had a gurgling noise coming out of the air intake, have worked my way down to determining the secondary air diverter valve is stuck open, and the gurgling noise is exhaust being pushed backwards through AIR pump and up into the intake... Plan on putting a new diverter valve on this weekend.
I pulled PIDs at IDLE (900rpm) and in PARK after driving for half hour..
FUELSYS1----OL FAULT
LOAD_PCT(%)----- 39.2
ECT (F)----------179
SHRTFT(%)------0.0
LONGFT(%)------21.9
MAP (PSI)-------5.4
RPM--------------903
SPARKADV-------14.5
IAT(F)------------55
TP%--------------17.6
AIR_STAT--------OFF
O2B1S1(V)------0.005
O2B1S2(V)------0.970
Do any of those seem unusual? I also had scanner hooked up as I was driving, and noticed that at the slightest touch of the gas pedal the LOAD_PCT pid would jump way up. At idle and in gear like at a light, the LOAD_PCT hovered between 40 and 45.
I disconnected the tube from the diverter valve to the pump at the pump and had exhaust coming out.
Any help is much appreciated.