All,
Need a bit of help with the two electric fans connected to the radiator, lets start with my setup here so we're all grounded...

1987 Camaro IROC-Z
350 TPI
All original

Ok that was easy. So, I drove my Camaro home this past weekend and while sitting in traffic (love Chicago traffic) I noticed that my engine was running quite hot, upwards of 240ºF, at which point I was turning my heat on which was helping and doing my best to mitigate the heat by continuing to drive as much as I could. My Service Engine Soon light comes on for about 15 minutes at a time every hour or so of driving, even though she runs just fine (seriously, this engine is strong!!). Anyways, I got it home and my dad and I took a look at it and found a couple things.

1. There is what looks like a connector on the radiator that is unplugged, I don't have a picture handy right now but I'll get one for you and post it later. On the radiator, below the cap about halfway down the radiator on the engine side of the radiator there is what looks to be a silver colored connector sticking out with nothing connected to it. I'm assuming that this should be plugged into something however my dad and I couldn't find a loose plug in the area of this connector. What is this connector? I'm assuming it's important and that this might be the cause of my Service Engien Soon light.

2. We idled the engine in the garage and watched the electric radiator fans to see if they kicked on. At 240ºF we decided to shut her off and that we have a fan issue. We have jumpered the ECM Input to the electric fan relay to ground and one of the two fans turned on, so the relay works properly. I now need to jumper the ECM input to the relay back to the ECM input to check for continuity between the relay and the ECM.

Basically, I'm not going to drive her too much until I get these fans fixed, don't want her heating up that much obviously. What would you guys recommend that I do? Any comments / suggestions would be greatly appreciated!

Additionally - at what temperature should I expect my fans to kick on? Obviously it's ECM Driven... I've heard 220ºF, but I haven't found the temperature documented in the Shop manual / electrical diagnostic manual, do you guys know?

Thanks,
Spgrooms

 

[Additionally - at what temperature should I expect my fans to kick on? Obviously it's ECM Driven... I've heard 220ºF, but I haven't found the temperature documented in the Shop manual / electrical diagnostic manual, do you guys know?]
My fan on a 305 TPI kick on at 235*