Automotive Sub-Forum

[highup]

How do you do a code check? I got no fancy automotive meter or what ever it is. I figured just going through and replacing all the sensors since they are so old. Most obvious ones like O2 first of course.
The guys over at the dodge forum seem to think its a clogged cat. But it just passed emissions easily last month.

EDIT: Oh yeah, the code check thingy didn't say anything. I even disconnected and reconnected the battery.

My S10 is a 93. It had an OBD1 system built into the computer. It's very basic and blinks a Morse code type signal so you can read engine and sensor faults. I think yours has that too?

OBDII I think needs a code reader/scanner. Computers on these newer vehicles usually '94 and later can tell you a LOT of things. A mechanic friend of mine said he was diagnosing an ignition issue and the computer told him that plug 6 misfired 15,823 times. Upon further checking, the spark plug had a very tiny black streak down the porcelain that caused the misfires.... The plug had a crack in it.
OBD1 diagnostics won't give you that sort of information.

You did the ignition on-off-on-off-on to do a code check/blinky thing, and got no codes?

 

[Ernesto]

Yup, blinky first said 55, and a trailer tow thing. Got no tow package. Fitty five means the battery disconnect. It wernt so I did it. Lol
Then redid blink y, nothing.

 

[Ernesto]

Gonna pick up an O2 sensor today and probably a IAC valve rotor and cap.

 

[highup]

I think I need a TPS also. Idle sometimes is revving up and down at idle 200 or 300rpm. The bad idle, from what I read is usually caused by a malfunctioning IAC
One thing to do is add some Chevron Techtron concentrate as per directions. Maybe add it to a couple of tank fulls.
Same thing with Seafoam additive to loosen and clean the fuel system. You can add it into a vacuum line............. I'd do the fuel system treatments with Seafoam and Techtron before changing the spark plugs. The truck will smoke after you do a Seafoam on it. Neighbors will love you.
I did both and noticed a major difference............ that said, when I purchased the truck, it hadn't been serviced for 5 or 6 years. It was only used occasionally making runs to the dump to drop off lawn clippings.

My first major mileage improvement was from the new O2 sensor. It wasn't functioning at all when i got the truck. I went from 14.5 mpg to almost 21. I am not sure if that's part of your issue, but they don't last for 100,000 miles, they do need replacement every so often........... you can google the average replacement period. I bought a Walker O2 sensor and it's good piece.