What happened to the Slow Down Light "fix"? | FerrariChat
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What happened to the Slow Down Light "fix"?

Discussion in '308/328' started by mike996, Apr 15, 2018.

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  1. mike996

    mike996 F1 Veteran

    Jun 14, 2008
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    Mike 996
    #1 mike996, Apr 15, 2018
    Today when I was out running the car the slow down light illuminated and stayed on for most of the 20 miles.

    My 328 has a Hyperflow bypass pipe with the thermocouple plugged in (no Cat) and, when checked with a Fluke IR gun, the temp of the bypass pipe wasn't even 300F.

    My SD light pops on every once in a while. A couple of years back someone was working on a reverse-engineered slow down module but nothing ever came from it that I have found. Any update?
     
  2. mike996

    mike996 F1 Veteran

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    #2 mike996, May 1, 2018
    Hmm..no response in a couple of weeks. I guess it was the same thing that happened to Fabspeed's claim that they had a muffler coming out that would add 30HP to a 3x8. Well, except that a slowdown light reengineering thing IS possible. ;)
     
  3. Brian A

    Brian A F1 Rookie

    Dec 21, 2012
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    1983 US 308 GTS QV
    #3 Brian A, May 1, 2018
    Having had my modules tested and found to be working, my belief is that most module problems are really thermocouple problems. kcabpilot, who is very familiar with airplane thermocouples, says they fail all the time. One of mine has failed.

    We need a cross-reference for a cheap thermocouple replacement.

    Yeah, the module replacement project seems to have stalled again. I am sure the problem is that it is a complex, unprofitable venture.
     
  4. moysiuan

    moysiuan F1 Rookie
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    Nov 1, 2005
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    #4 moysiuan, May 1, 2018
    Try cleaning the thermocouple probe with a brass wire brush, and then using Deoxit on the connector to the module. It is very sensitive to resistance, that's what it is measuring, so even slight (invisible) surface oxidation can alter the readings. No one has created a cheap replacement thermocouple I am aware of, but it really should not cost much, given what it is.
     
  5. mike996

    mike996 F1 Veteran

    Jun 14, 2008
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    #5 mike996, May 2, 2018
    In my case, the slow down light does not usually illuminate (self-check) when the ignition key is turned on. Once in a while it will. All module connections are OK so I'm assuming its the module itself that has failed. As i have said before, I'd reinstall a Cat if the module was working properly.
     

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