2005 Chevrolet Silverado
Mileage
122,404
Service Date
9/27/2023
Services Performed
- p0101, p0171, p0174- these all three should be related to a faulty mass airflow sensor. also advise changining the air filter and cleaning airbox of debris. observed 45 counts on fuel trim and -14 on decel at times and p0101 did reset while testing. P0446 for a vent control performance issue. found the vent solenoid tested operational but found the fuel tank pressure stuck at 4.8 volts and -17 hg. even with fuel cap off and with engine off. Likely a faulty fuel tank pressure sensor but fuel tank needs removed to diagnose fully. Is the fuel pump and fuel sending unit performing properly? would be good time to address any issues with fuel tank removed.
- Found the ac compressor binding or slipping and ac pressures going high to 300 psi. There was no airflow going across the radiator and cooling fan was free-wheeling and speeding up engine did not help/ THe refrigerant level was low as well. .871 recovered of a 1.6 lb system. Put a large fan in front of the radiator and operated the ac again. now the high side never went above 250 psi and never duplicated a squeal noise from compressor while testing.
- completed. verfied fuel trims staying near zero after repair and p0101 staying away.
- completed.
- coompleted.
- completed.
- completed. verified no longer squealing while testing after repair.
Clark O. gave our service a 5 star review on 10/3/2023
