87 Blazer converter glowing

[Pvaughan]

My 87 2,8 S10 Blazer's catalytic converter glowing red. I do understand that when this happens, that it's because it's running rich. Ran great until I had first converter meltdown. Replaced converter, map sensor, O2 sensor, dist cap, plugs wires. Checked cleaned egr valve, checked egr system (ok). Compression, engine/valve timing, vacuum well within specs. Does seem to foul plug(s) on passenger side only. Exhaust seems clean, no fuel odor. Took to garage and had diag run on it, was told everything was ok except the injector on right side had no particular spray pattern and dumping fuel in and needed to be replaced. Replaced injector, did not solve problem. Checked all wiring, OK, each inj is being pulsed as checked with my RS digital logic probe. Have read forums about fuel problems and tried their suggestion. Did discover that maybe my temp sensor might be bad. Now here the weird part, I unplugged the temp sensor while engine was running, converter glowing and detected a slight change in the engine, the service engine light came on (expected) and the converter began cooling down, let it run for about 2 more mins, converter was not glowing, but did smell strong odor of fuel, exhaust smoke was black (running rich). My delimma, if the engine was in a rich state, no fuel odor, converter glowing, then why, when I removed the plug on the temp sensor did it cool down when it seemed to be really running rich??? I'm lost, but going to replace the temp sensor, o2, and map sensor again, as well as plugs wires, cap. Anybody have any other ideas, other than the junk yard..

[smahala1286]

If its glowing red that means its getting to hot and that makes me think that you are running lean not rich cause you engine will run extremly hot if you are running lean. Hope that helps a little.

[Macgyver007]

I think its plugged

[wehswarriorS-10]

is it sluggish any....wont rev

[Pvaughan]

Originally Posted by smahala1286

If its glowing red that means its getting to hot and that makes me think that you are running lean not rich cause you engine will run extremly hot if you are running lean. Hope that helps a little.

Thanks for info
I'm not to good on these newer vehicle. I did know that when, in a carbutered engine, the exhause manifold cold get very hot and glow in a lean mixture. The garage mech after having it on his diagnostic machine, said if was running rich and needed to replace injectors. My last few, 30+ yrs were on heavy equip.
Thanks again.
Paul

[Pvaughan]

Originally Posted by wehswarriorS-10

is it sluggish any....wont rev

revs seemingly ok and not very sluggist. Vacuum/compression/timming all check out ok