[s-cars] S72 fuse

[James Murray]

Don't forget to change both of them, the S72 & S64. The S72 is for Fuel Injectors, and S64 is for the Ignition Coils.

http://forums.quattroworld.com/s4s6/msgs/126555.phtml

http://forums.quattroworld.com/s4s6/msgs/125185.phtml

Cheers, /Jamu

________________________________
From: Jerry Scott [mailto:jerryscott at wispertel.net]
Sent: October-24-11 4:04 PM
To: James Murray
Cc: 's-car list'
Subject: RE: S72 fuse

Thanks James and that's great news.  I have had a problem for many years with the car starting in sub-zero temperatures and sometimes stomping on the passenger floor would allow it to start.  I have had the ECU out many times looking for bad connections, but never thought to check those fuses.  I did find that it was always a lack of spark when it would not start, but just moving the car would often allow it to start.  I am guessing that those fuses would then reset with the slight vibration.  I'll change them right away.
Jerry

From: James Murray [mailto:james.murray at ericsson.com]
Sent: Monday, October 24, 2011 12:43 PM
To: Jerry Scott
Subject: RE: S72 fuse

Hi Jerry,

none whatsoever, no problems, and if you do a further search you will find that the S6 switched all of them to regular blade fuses.

Everyone was debating the same as you, there had to be a reaon for putting the Thermal Fuse, and likely at the time there was... but Audi also found the choice of using a reset fuse (thermal fuse) had a downside, which was it could cause an intermittent symptom, which only masks the real problem... so with the S6 model they did away with the reset (thermal) fuse and went with regular fuses.

Do yourself a favor, make the switch!

BR, /James

________________________________
From: Jerry Scott [mailto:jerryscott at wispertel.net]
Sent: October-24-11 2:24 PM
To: James Murray
Subject: S72 fuse
James
I saw your article on the S72  15 amp fuse in the 93 S4.  Have you had any problems with replacing that fuse with a standard 15 amp fuse?  Since the S72 is a reset fuse, have you ever had the standard fuse blow and shut you down?  There must be a reason that they did not use a standard fuse, thinking that this fuse will occasionally blow and then reset.

Jerry Scott
Denver