1G AC belt causing other problems?

[jgouds]

Hey all,
Something strange happened to me last night and i was hoping to get some input -
While driving somehow the cord for my wideband fell into the path of the accessory pulleys and got chewed up a bit and removed one of the belts for the A/C. No weird noises or anything from the car - just as I pulled up to a stop light I noticed i had developed idle surge and I suspected a vac leak somewhere. I was about 5 minutes from home so I figured I'd get at it when I got there. When I got home - No oil pressure (at least on the stocker gauge). Car sounds like it's mis-firing. Idle surge.
So what I'm wondering is how could the A/C belt coming off do all this? Car ran great before - and I've searched and it seems that people run fine without them.

Lower timing cover is on so no damage to T-Belt. Other accessory belts look fine. Checked all the hoses I could get at before work - everything is connected. Oil pressure gauge bottomed out (almost like it wasn't connected) but the oil pressure warning light didn't come on (which I know works).
Anyone have any ideas??

 

[miliman13]

Any chance the belt smacked the oil pressure sensor? Or disconnected it? Its fairly close to that area. And if your wideband is gone and you were using it in Lou of your OEM frontO2 you could be in the wrong loop. Open loop I believe.

 

[jgouds]

I will check the sender - thanks! I am using it as the primary o2 sensor - it was still reading values just fine, and I've driven sans o2 sensor (forcing open loop) before and it never surged. Just ran fairly rich. The surge is strange though - it will surge around 1250 to 750, then drop and surge around 1000 to 500, the raise and surge around a 1000 to 1500. Not consistent at all. Only started happening after the belt came off - but I have no idea how they're connected

 

[bmxfelon420]

The only thing I can think of is it's a idle adjustment related to the AC itself. Maybe try unplugging the compressor? I know it's a pain to get to, but just a thought. Or just replace the belt again.

 

[jgouds]

I'm going to try and put the belt back on, check the sender, clean up the wideband cord and do a BLT just to be safe. I'll poster back when I got some results. Thanks for the input, guys[DOUBLEPOST=1407948250][/DOUBLEPOST]Sooo. Ended up cutting the belt off because it was right knackered. Found that it coming loose had knocked the oil gauge wire off - reattached that and all is well there. Inspected accessory belts and t-belt for wear, none that I can see. What's strange to me is it is still surging - but not like any idle surge I've seen. I can barely make any boost. It bucks around 1 to 2 thousand rpm and my wideband is jumping all over the place at idle (from 13 to full lean sometimes) when it used to be stuck right at 14.7-14.9. I suspect a big boost leak and maybe a vac leak but couldn't get at my buddies compressor yesterday.
Weird thing is: no leak or any weird issues prior to belt coming off. Anything else that the a/c belt could have hit and caused symptoms such as this?