carlos2012
Newbie
Hello all! I'm having a misfile at idle problem on my 98 C1500 with the Vortec 5.0 engine. It has the following codes:
P0147 - 02 Heater circuit - pending
P0452 - Evap emission pressure sensor / low input
P0172 - System too rich bank 1
P0175 - system too rich bank 2
P0300 - random misfire
When viewing the misfires per cylinder via a Snap-On scanner, cylinder 5 has a bad misfire, along with cylinder 7. When pressing on the throttle in park, the misfire goes away, though sometimes cylinder 3 reports a brief misfire. The truck drives like normal, it just idles really rough and has a very strong exhaust smell. Cylinders 5 and 7 have new spark plugs, and the cap and rotor have been changed. Looking at other posts online, this seems to be common issue that can be tricky to isolate the cause of.
P0147 - 02 Heater circuit - pending
P0452 - Evap emission pressure sensor / low input
P0172 - System too rich bank 1
P0175 - system too rich bank 2
P0300 - random misfire
When viewing the misfires per cylinder via a Snap-On scanner, cylinder 5 has a bad misfire, along with cylinder 7. When pressing on the throttle in park, the misfire goes away, though sometimes cylinder 3 reports a brief misfire. The truck drives like normal, it just idles really rough and has a very strong exhaust smell. Cylinders 5 and 7 have new spark plugs, and the cap and rotor have been changed. Looking at other posts online, this seems to be common issue that can be tricky to isolate the cause of.