g00se
Newbie
Hello, I recently picked up a 1994 5.7 5 speed manual 5.7L 2500 truck. I've always wanted one of these and just now getting acquainted. I've been browsing this forum for a while which has been great!
The truck runs and drives pretty good --but won't pass emission testing. It first failed for CO and HC (it smelled a little rich). I replaced the coolant temperature sensor and MAP sensor and air filter. It passed for CO on the second test --but still failed for HC. It had no OBDI check engine light errors.
I replaced the spark plugs and wires, cap and rotor and it seems to be running better and I drove it around awhile and decided to take it in for a third test --but it threw a CEL on the way so I turned back home to check the codes. It has a DTC 15 (coolant sensor), DTC 32 (EGR) and DTC 54 (fuel pump relay?)
That DTC 54 seems unrelated to the HC emissions fail. The DTC 32 could be the EGR solenoid? My EGR solenoid has three wires in a four wire connector. I'm hoping I can test it with multimeter --probably the same with the DTC 15 coolant sensor.?
I really like this truck and really appreciate any help figuring out what to do next.
The truck runs and drives pretty good --but won't pass emission testing. It first failed for CO and HC (it smelled a little rich). I replaced the coolant temperature sensor and MAP sensor and air filter. It passed for CO on the second test --but still failed for HC. It had no OBDI check engine light errors.
I replaced the spark plugs and wires, cap and rotor and it seems to be running better and I drove it around awhile and decided to take it in for a third test --but it threw a CEL on the way so I turned back home to check the codes. It has a DTC 15 (coolant sensor), DTC 32 (EGR) and DTC 54 (fuel pump relay?)
That DTC 54 seems unrelated to the HC emissions fail. The DTC 32 could be the EGR solenoid? My EGR solenoid has three wires in a four wire connector. I'm hoping I can test it with multimeter --probably the same with the DTC 15 coolant sensor.?
I really like this truck and really appreciate any help figuring out what to do next.