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Sam
 
Join Date: Feb 2014
Location: Raleigh, NC
Posts: 42
Garage
What is this thing, part 2

Piggy backing off Gretz, can anyone (Dennis?) identify the small square black box attached to the driver side wheel well area in the frunk of my US version 82 911SC?

I came across the box as I began installing Fred Cook's fuse panel update (only took me four years to get around to it). In doing that project, I have had to repair some old wiring, add sections, etc, which I expected would be the case. I am also cleaning out the last wires from an aftermarket alarm system (aka the nightmare). Being a novice wiring diagram reader, I cannot find the mystery box in the Bentley Manual, but I am sure someone will tell me it is there.

Any help is greatly appreciated.

Sam

Old 06-13-2018, 03:22 PM
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Box with the X ?

Rev limiter.
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Old 06-13-2018, 03:31 PM
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That box (the one with the "X" and no visible numbers), if memory serves me, has something to do with the fuel pump/rev limiter circuitry.
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Pete Z.
Old 06-13-2018, 03:36 PM
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Sam
 
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Thank you both. You California guys have all the answers.

And Dr. Z., nice to hear from you!

Best,
Sam
Old 06-13-2018, 03:44 PM
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I looked for info on rev limiter on the Carrera 3.2 Owners Manual and did not find it. Did I miss it? Where is it discussed in the Owners Manual?

Last edited by adias; 06-21-2018 at 08:47 PM..
Old 06-21-2018, 07:49 PM
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Quote:
Originally Posted by adias View Post
I looked for info on rev limiter on the Carrera 3.2 Owners Manual and did not find it. Did I miss it? Where is it discussed in the Owners Manual?
I believe the Motronic ECU provides that function.
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Old 06-21-2018, 09:02 PM
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Quote:
Originally Posted by pmax View Post
I believe the Motronic ECU provides that function.
Right, of course. I found a reference to a 'speed limiting governor' on page 32 of the '86 Carrera Owners Manual. I found no other mention.

Last edited by adias; 06-21-2018 at 09:11 PM..
Old 06-21-2018, 09:06 PM
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Quote:
Originally Posted by adias View Post
Right, of course. I found a reference to a 'speed limiting governor' on page 32 of the '86 Carrera Owners Manual. I found no other mention.
The 86 owners manual has no bearing on this.
1984 and later Carreras are Motronic DME computer controlled.
1973.5 thru 1983 are CIS K-Jetronic controlled.
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Old 06-22-2018, 01:58 PM
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