I have a 93 v6 Pickup that is running rich at idle. It set a code 45 yesterday for the first time. Today, it seems to be down on power getting on the interstate.

I checked it out on my scantool and the block learns are pretty steady in the 103-104 range. Integrator is at 122.

The TPS and coolant temp sensors looked to be reading OK. The 02 sensor was replaced last winter and seems to be functioning as it's supposed to.(fluxing rich/lean regularly).

Fuel pump has been replaced in the last 3 years and so has the filter(albeit it could used replaced again)...

Truck has 117k miles on it and is a daily driver.

Any ideas?

Thanks,

 

i would suggest looking at spark. plugs/wires/cap/rotor

also pull the plugs and verify you are really running rich.

BTW, what exactly is code 45 in your application (too lazy to see what computer ect, you rig uses.) finding what that code is would be a great help.

 

I pulled code 45 from here...I got the code, but with the way my scantool spits out info, I just read '02 sensor rich' on the screen.

Truck runs fine other than lack of power. Doesn't seem to miss or anything.

Thanks for the suggestions...

 

also, o2's can go bad quickly , you might try a new o2. like i said, i would pull a plug, and make sure you are actualy running rich.

 

Thanks for the help...I haven't gotten back to it as it has been really cold and I bruised my ribs up bad in a fall.

Luckily I haven't had a 'low power' issue since Monday morning..