Rowdy94

iTrader: (13)

Driving to the gym today and when I got in the parking lot the SES light and my fan popped on. No other problems, so I glance at the gauges...Everything's fine. So it stayed on for 2 or 3 minutes and then shut off about as I pull into a space. Fans shut off as well. The car's temp was under what the fans normally turn on at.

So I go inside and lift. Driving back to my apt. it happens again. I drive the last two minutes to my apt. and park my car. Shut it off and start it right back up. Light and fan still on. Shut it off again and waited about ten seconds. Fire it up and the light's off.

WTF? O2 Sensor going bad or something? I gave it enough gas to downshift into first from 25 when the light was on the second time and it felt as powerful as normal.


I do have a USB to ALDL cable, but all I've done is lower fan turn-on temps 5 months ago.

What programs can I use to check to see what code it threw???

I'm going to do some searching tonight but I wanted to see what ideas people had about what could be wrong.

I would appreciate any help. As of last week, fluid levels are all good...I'm checking over everything tomorrow morning. In the cold. And snow.

Rowdy94

iTrader: (13)

It's in the sig but I wanted to specify it's a 94 so OBD-1

Sean Collins

do you know anybody with a obd2 GM cable scan tool ? to me on the face of it sounds like a flaky temp sensor connection.

Rowdy94

iTrader: (13)

Autozone runs OBDII cars for codes right?

That makes sense as the fan turns on with it. Wouldn't that throw off my temp guage in the dash at the same time?

2xLS1

iTrader: (25)

Google datamaster. It's a free download and should work with your OBD1 cable.

Rowdy94

iTrader: (13)

it shows $100 and some odd dollars from TTS

Sean Collins

Actually tunerpro has a Com definition file and data master gives you a few free scans. I checked the schematic guage to dash has a seperate sender.

Rowdy94

iTrader: (13)

ahh got it....20 free runs

Im going outside now to run this ****** thing. its about 20 degrees out.

2xLS1

iTrader: (25)

You only pay after you exceed the 20 free recording sessions. The software is a free download.

I see you figured it out.

Rowdy94

iTrader: (13)

#32 EGR system fault.
Glad it's not a big deal. I'll look over the system tomorrow. Might just rush the header install.

Nothing as far as EGR goes should keep me from driving the car correct? If something's faulty there, not too big of a deal?

Rowdy94

iTrader: (13)

I did see that I'm getting tons of knock retard up top. Time for the LT4 KM.

Sean Collins

code 32 with intermitent fan cycling ??? id check the knock sensor board in the pcm to make sure its tight and dry. I have seen this before with a loose knock module and or water penatration. the fan cycling is what gets my attention. won't hurt a bit to check and I know it sounds crazy but i had a guy leave on out of a pcm once and EGR code Fans on. I would have never belived it if i hadn;t seen it.

Rowdy94

iTrader: (13)

Thanks for the heads up. I'll take a look at it tomorrow when I look over everything else. It's been as cold as it's been the past couple days since I've owned the car if that could have anything to do with it.

P.S....That IS in the PCM under the hood correct? I've yet to have to deal with it.

I appreciate all of your help on this too.

Rowdy94

iTrader: (13)

Nevermind. I looked on shoebox's site and see that it is.

I'll let you know tomorrow what I find.

Sean Collins

Make sure the knock sensor module cover has the green rubber gasket on it. If not that would be the culprit. the only reason I even mention this is the fan behavoir and the fact that its pretty much raining cold *** ice water everywhere in america and the module cover is in a position to wick water in the case given its orentation to the cowl.

Rowdy94

iTrader: (13)

I can't see any problems with the EGR system or the knock module as Sean told me to check.

There shouldn't be any problem leaving it alone for a month or two until I put my headers on. Is this correct? I can't see how a malfunctioning EGR system could really hurt anything.