Weird fan behavior
Thread Starter
Launching!
Joined: Apr 2019
Posts: 206
Likes: 11
From: Bay area
Weird fan behavior Hello guy's so I have a 95 trans am that I just purchased like a month ina half ago with only 28xxx miles on the new motor with a rebuild tranny. Reason i say new is because the previous owner swapped the original motor with another lt1 block from a 96-97 modal. While under the car one day I spotted a cps, but wasn't plugged up cause the pcm is a 95 so it doesn't even know what a cps is. But that not the issue, it's the fans which got me confused. When I got it I noticed everytime I started it, fans will come on right away. Even when I turn the key to the On position, fans kick on. No ses light is on and that was weird cause they will stay on the whole time Im driving until I shut it off. Also I noticed the ses will come on every now and then when I start it and will not come on other starts. So I started replacing parts like the maf, o2s, map, iat, spark plugs and wires, ect, idler valve on throttle body. Hell I even replace the gauge sensor on driver head. Fuses everything I can fix that ses. So after all that, light doesn't come on anymore. But fan still run and now it's only one (Passenger side fan) and the driver side fan doesn't work, even when I turn the ac on still doesn't. It's only comes when I pull a sensor and ses light comes on then both fans are blowing high speed. But when I plug it back in driver fan goes back off and passager fan just keeps blowing. I did notice a switch inside the car but it doesn't even work. I need some help on figuring this fan problem out. Car sometime reach 245 degrees and driver fan still doesn't come on. Only when I pull a sensor it works. Any info help thanks
