Help on electrical
Thread Starter
Addict
Rennlist Member
Rennlist Member
Joined: Aug 2001
Posts: 1,047
Likes: 1
From: Land of many Potholes, Michigan
Help on electrical
Well, I was in the process of removing my rear bumber to fix my tail lights (one was so tight in the assembly, I couldn't remove it no matter what) with the help of Bergstsm. I was removing my brains (The shark brains!), to install my FVT performance chips thast came with my donor shark.
On one brain the two green wires are for the lower octane loop. But on the Jetronic (inner) brain there is two brown wires with molex connectors that are not connected. Can anyone pipe in and tell me what these are for?
TIA
John D.
'85 928 Auto, Black
On one brain the two green wires are for the lower octane loop. But on the Jetronic (inner) brain there is two brown wires with molex connectors that are not connected. Can anyone pipe in and tell me what these are for?
TIA
John D.
'85 928 Auto, Black
Thread Starter
Addict
Rennlist Member
Rennlist Member
Joined: Aug 2001
Posts: 1,047
Likes: 1
From: Land of many Potholes, Michigan
Wally,
The set of brown wires on one brain, and a set of green wires on the other brain are for the octane loop? I always thought that there was only one set of wires (the green wires) were for the octane loop.
Thanks for the update.
John D.
The set of brown wires on one brain, and a set of green wires on the other brain are for the octane loop? I always thought that there was only one set of wires (the green wires) were for the octane loop.
Thanks for the update.
John D.
Three Wheelin'
Joined: Jan 2002
Posts: 1,560
Likes: 2
From: Maryland
Dozman,
GO to this thread <a href="http://forums.rennlist.com/cgi-bin/rennforums/ultimatebb.cgi?ubb=get_topic&f=14&t=002152&p=" target="_blank">octane loop thread</a>
and scroll down to my pic near the bottom. There is a pic of the brown wires for the octane loop. I'm not sure what the green ones are, the brown ones should be the only octane loop.
Greg
GO to this thread <a href="http://forums.rennlist.com/cgi-bin/rennforums/ultimatebb.cgi?ubb=get_topic&f=14&t=002152&p=" target="_blank">octane loop thread</a>
and scroll down to my pic near the bottom. There is a pic of the brown wires for the octane loop. I'm not sure what the green ones are, the brown ones should be the only octane loop.
Greg
Three Wheelin'
Joined: Jan 2002
Posts: 1,560
Likes: 2
From: Maryland
Dozman,
I'll look in my EFI test plan book. Can you email to me a pic? I'll trace it down for you.
We're not talking about the green O2 sensor wires, are we? Large black rubber plug on them.
Shoot me a pic, if you can.
Greg
I'll look in my EFI test plan book. Can you email to me a pic? I'll trace it down for you.
We're not talking about the green O2 sensor wires, are we? Large black rubber plug on them.
Shoot me a pic, if you can.
Greg
Three Wheelin'
Joined: Jan 2002
Posts: 1,560
Likes: 2
From: Maryland
OK Doz,
Here is what I learned from the Test Plan book and a quick look at my car.
The EZF control unit is the brain with a large connector and a vacuum line connector. It has two Green w/blue stripe wires for the Low octane loop. These wires piggyback the temp I sensor and when connected, send a 0 ohms temp I signal to the brain. (side-note, if the temp I sensor is defective, (as in shorted accros the terminals), it's the same as having the Low Octane Loop connected all the time!
The LH control unit next to it has two brown wires for the Low octane Loop. The schematic shows that one of these brown wires is ground. The other is labled "Low Octane Loop"
On my car, the green/blue wires are completely taped up in the wire harness. I didn't know they were there untill I started fishing for you today.
The brown wires on my car are exposed.
I'm sure that both sets of wires should be left un-connected for normal driving.
The picture I referenced which I posted on the other thread is referring to the green/blue wires. I, and others, have told people to look for brown wires. Both green/blue and brown sets are Low Octane Loop, but the book refers to connecting the green/blue wires for Low Octane Loop feature, and leaving them unconnected for normal driving.
Greg
Here is what I learned from the Test Plan book and a quick look at my car.
The EZF control unit is the brain with a large connector and a vacuum line connector. It has two Green w/blue stripe wires for the Low octane loop. These wires piggyback the temp I sensor and when connected, send a 0 ohms temp I signal to the brain. (side-note, if the temp I sensor is defective, (as in shorted accros the terminals), it's the same as having the Low Octane Loop connected all the time!
The LH control unit next to it has two brown wires for the Low octane Loop. The schematic shows that one of these brown wires is ground. The other is labled "Low Octane Loop"
On my car, the green/blue wires are completely taped up in the wire harness. I didn't know they were there untill I started fishing for you today.
The brown wires on my car are exposed.
I'm sure that both sets of wires should be left un-connected for normal driving.
The picture I referenced which I posted on the other thread is referring to the green/blue wires. I, and others, have told people to look for brown wires. Both green/blue and brown sets are Low Octane Loop, but the book refers to connecting the green/blue wires for Low Octane Loop feature, and leaving them unconnected for normal driving.
Greg
Trending Topics
Thread Starter
Addict
Rennlist Member
Rennlist Member
Joined: Aug 2001
Posts: 1,047
Likes: 1
From: Land of many Potholes, Michigan
Thank's a ton Wally, Greg and everyone who posts here.
Greg, Thanks for the reinforcement. Wally, I didn't doubt you at all. I was concerned maybe we were on two different pages. I guess I was on the wrong page, and you are on the right page.
Wires taped up, and tucked away.
John D.
Greg, Thanks for the reinforcement. Wally, I didn't doubt you at all. I was concerned maybe we were on two different pages. I guess I was on the wrong page, and you are on the right page.
Wires taped up, and tucked away.
John D.
Rennlist Stories
The Best Porsche Posts for Porsche Enthusiasts
Talos Takes Your 991 Porsche 911 GT3 to the Next Level for a Cool $1.13 Million
Verdad Gallardo
9 Vehicles Porsche Helped Engineer that Aren't Porsches
Verdad Gallardo
9 Features and Characteristics That Only Porsche People Understand
Verdad Gallardo
I've Written 500 Rennlist Articles: Here's How Porsche Has Changed Along the Way
Joe Kucinski
10 Most Unnecessary Porsches Ever Built (And Why We Love Them)
Verdad Gallardo
Porsche 911 GT3 S/C vs 718 Spyder RS: 10 Categories, One Winner
Joe Kucinski
This Builder Is Turning Heads With Its Slantnose 911 Creation
Verdad Gallardo
Porsche 911 GT3 Artisan Edition Pays Homage to Japanese Culture
Verdad Gallardo
