Ok drove my car in the rain today and now I'm on the side of the road with my ls1 missing. I forgot to tape upy rear o2 sensors when I put my headers in and they are dangling down and soaked. Is that my problem for the missing?

 

A rear O2 sensor should not cause a misfire in any condition, you should however get a tune to get rid of the rear 02 sensors in the pcm if you haven't already. I would check the basics first, plugs, wires, and work your way into it from there. If it is misfiring extremely bad ( flashing CEL) stop driving it and get it towed home.

 

Did you go through a big puddle? JW if coil packs getting soaks could be an issue on these cars.
I know the opti sparks in the LT1's hated water...

 

That would be a good size puddle to get to the TOP of the engine. You would have more problems then coil packs.

You can wash an ls1 engine bay.

OP, need more details.

 

Yeah I suppose so, it seems highly unlikely, but somehow the opti's in the LTs got water in them time to time and those are buried behind the water pump towards the upper part of the engine.

You should honestly check to make sure all of your coil pack connectors are tight and not corroded. Also check to make sure all of your plug wires at the coil and plug are tight and not loose. Moisture in the air adds resistance in circuits exposed to weather.

 

Engine was dry as a bone on top. Check the wires and all seemed tight. If I shut the car off and back on it would run great for about 2 minutes and then it would start missing and the ses light would flash. When it would do that I would pull over shut it off for a couple minutes and start it back up and all would be fine for a bit. Finally the car started running normal and I got home but went to drive it this morning and its missing again. When it would bog down I could mash the gas and it would pick back up but as soon as I let off it would bog.

 

Check the fuel pressure, plugs, wires, coils, ect...

 

Sounds like a sensor issue to me... Run the codes.

Try unplugging the MAF while it is acting up and see if that fixes the issue. If it helps, MAF is bad... If it continues, look elsewhere.

 

ok went out started the car. started up great but then after a minute it started being sluggish again. pulled the sensor on the intake and the maf and the rpm's jumped up and started running good but after a minute it started being sluggish agian. Checked my plug wires and are all good. ???????????

 

You said you just did headers, yes? Did any wiring come in contact with the headers? I had the exact same behavior you are describing when the wire that runs from the battery to the starter contacted the header and melted the insulation. When I drove it in the rain, the wire was shorting when the water hit the exposed wiring.

 

When you check the MAF only unplug the MAF, nothing else...

Have you ran the codes?

 

have not had time to get codes ran. hopefully going to get them done this weekend if i can get the car somewhere to do it. hopefully can get the car in the air to check if any wires are contacting the headers.

 

got under the car today and found that the plastic protective tube around the o2 extension had got melted but the wires themselves were ok. So i unplugged the extension and started the car up and ran good but not as peppy as it was before the melting. So got back under the car, plugged the o2 extension back in and car ran like ****. Couldn't even get it out to the road it ran so ruff. So could the o2 being unplugged cause the car to not run quite as good as it did before?

 

Yes... Replace it and see what happens, sounds like your issue.