Hey guys, haven't posted in a while. I finally got my first Camaro, it's a 1991 Camaro RS with the 305 TBI and a 700R4 Transmission. Got it for like 450 bucks and it's pretty solid, it just needs a tuneup, a brake line and some paint.

Anyways, while I just changed the air filter, air breather, manifold temp sensor, rotor, cap, plugs and wires (Except the rear ones on each side, can't reach them myself. ><) I siphoned out the bad gas that was in it, added some new gas and some gas treatment/injector cleaners, cleaned out the throttle body and replaced the serp belt. For some reason though, Trouble Code 23 flashes even though I changed my manifold air temp sensor. Also, it seems like when I first start it up the car runs fairly well, but once it's warmed up if I put my foot on the accelerator up to like 2k rpms, the engine starts to chug, bogs down, then gets back up to standard idle rpms.

I haven't changed the fuel filter yet which is next on my list, but I'm still unsure why the engine keeps doing that and why I have trouble code 23.

Trouble code 23: Manifold Air Temp. Sensor
Defective Sensor
Defective ECM
Short in circuit or wiring

That's a few of the things that are listed in my troubleshooting manual for Code 23, does anyone have any suggestions?

 

check what book says also make sure plug wire on right and tight.My guess you bought a bad sensor its happened to me.