Hi guys!
My '02 S4 has a cooling problem. As soon as the left fans "kicks in" I have an idle issue with erratic RPM causing the engine to die. If I manage to keep the engine running with the throttle, the problem only gets worst as the second fan comes on. If I disconnect the fans, the engine gets hot but no RPM problems and idles perfectly.
So I thought that maybe the fans draws too much amp.(but the 7.5A fan fuse is still good) and then the ECU has less voltage than necessary to do his job with the fuel map.
I have changed the battery for a brand new one, so I wrote that off as a potential culprit.
I've connected each individual fan directly to a 12v power source and they both run really good. So I think that the fan by themsleves are in good working order. So I kind of think of a bad ground wire on either of the left or right fan electrical circuit. What's your guess?
I noticed that the two fans have a different part number. In a troubleshooting procedure idea; can I switch the right and left fan to see if it changes anything?
Do you guys have any ideas to where or what I should look in order do find the problem and (hopefully) fix it?
Thanks in advance
My '02 S4 has a cooling problem. As soon as the left fans "kicks in" I have an idle issue with erratic RPM causing the engine to die. If I manage to keep the engine running with the throttle, the problem only gets worst as the second fan comes on. If I disconnect the fans, the engine gets hot but no RPM problems and idles perfectly.
So I thought that maybe the fans draws too much amp.(but the 7.5A fan fuse is still good) and then the ECU has less voltage than necessary to do his job with the fuel map.
I have changed the battery for a brand new one, so I wrote that off as a potential culprit.
I've connected each individual fan directly to a 12v power source and they both run really good. So I think that the fan by themsleves are in good working order. So I kind of think of a bad ground wire on either of the left or right fan electrical circuit. What's your guess?
I noticed that the two fans have a different part number. In a troubleshooting procedure idea; can I switch the right and left fan to see if it changes anything?
Do you guys have any ideas to where or what I should look in order do find the problem and (hopefully) fix it?
Thanks in advance