Just install my underdrive pulley and took the car for a spin. Noticed a small increase in power from 0-90 not much but some mostly around the shifting point. From 90-shutoff very nice increase in power. Only problem is after all that fun i could smell a hot smell, popped the hood and front manifold was cherry red, back was glowing but not as bad as the front. Checked the cat (first idea) and no glowing. Any one have an idea. Also is it safe to drive like that?

For some reason, it seems that it is running extremely rich. Fiero'* were known to do that if the EGR tube was cracked.

i would believe it is running rich because the tips are always covered in black carbon. And have been told it "smells like it is running rich". I dont understand why it would do it after a small thing like that underdrive pulley. How would i go about fixing it. Maybe something like resetting the computer maybe?

well the main components that control the Air fuel mix...are the o2 sensor...might be old, make sure its a AC Delco, clean MAF sensor, and check air filter.

recharged the k and n about a week ago. Going to do a new o2 sensor. Any more ideas.

I say replace the cat. There must be a blockage somewhere.

x2

HOWEVER there should be a serious loss of power if its that bad.

I dunno about a serious power loss, mine have glowed before.

If you're running 90-shut down, you're pushing some seriously hot exhaust.

I wouldn't be supprised if they were glowing.

I'd bet after my 126 run they were glowing on my motor

Do you notice any decrease in power as the car heats up? When my 95 cat went thats what I noticed.

Underdrive pulley? Which one? Crank? Water pump? Alternator? Please be specific.

Running lean is more likely to make the manifolds glow than running rich. Check your fuel pressure.

Cleaned the K&N? If any oil got on the MAF sensor after reinstalling, it could affect the reading or blow out the MAF. Clean the sensor. Instructions are in Techinfo.

Bang on the catalytic converter. Both up and down, and side to side. Any noise?

How old is the O2?