Quote:
Originally posted by DennisR_944
My vote still goes to it's working properly. It doesn't take much for the fans to cool these aluminum blocks down. You put in lower temperature components so it's not getting as hot as before thus the fans are cycling shorter times. ..
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I understand what you're saying, but this is the cycle I'm experiencing:
2nd fan goes on and goes to FULL speed (5 seconds)
As soon as it hits full speed, it stops.
While it is slowing down, it kicks in again.
This cycle repeats over and over again.
If you heard this cycling process, you'd know that something is not setup right.
There are many components to the S2 cooling system: not just the thermo and fan switches. There are sensors in the throttle body and the intake. They run coolant through the throttle body to prevent icing of the throttle in cold conditions. (Ever hear of icing in the carbs? The coolant is to help prevent this type of condition in our throttle bodies!) So when the throttle body gets hot enough, the sensor tells the fan to switch on. For now, they removed the coolant in and out hoses to the throttle body to bypass that sensor. (Actually, that may help with performance, since theoretically, the air going into the engine will be a little colder!)
The intake has a similar sensor: it's underneath and toward the firewall. And of course the AC system is also hooked up to the whole system too.
My car will be back at the mechanics for further investigation (I took it for the weekend autocross!) John took home a working FAN relay to try to figure out how it works.
My take: when I switched to the lower thermo and fan switches, somethings causing a loop: there must be a higher temp sensor somewhere that turns on the fans, and then the lower temp stuff turns them off: kinda like two kids playing with 2 light switches conected to the same lightbulb.
I'll let you guys know ASAP what's going on.
-Zoltan.