hey folks,
i just picked up a 1991 2.0 si prelude with a 5 speed.

after a drive when you shut the motor off and get out of car the fan will come on.

ok thats not so wierd. i have also had an 89 prelude in the past and 90 accord. its normal i am pretty sure.


but with this car it will stay running for 20 minutes plus. today the car had been sitting for 2 days or so and i went out to start it and had pretty much a dead battery. so i jump it take it for a long drive battery is charged back up. cranks right over. get home park it. fan starts running again so i go inside eat and come back out 25 minutes later. fan is off and battery is almost dead again.

what could be the problem? is it a bad temp sensor or something?
the car is at normal temp too. not to hot or anything.

thanks for the help.
ryan

 

ttt anyone?

 

probably bc its so hot outside and its old and gets overheadted. its just cooling off

 

Mine does the same, runs for about 15 minutes after a long drive

 

you can do a coolant flush - maybe the stuff isn't good anymore. there's also a thermo switch that controls the fans, but I don't have the manual for the 3rd gen on me. that might need replacing.

 

thanks for the replies. i am gonna check out that switch tomorrow.
i have the 79-89 manual from my previous car but it doesnt cover this year. although they are very similar.