help with 3.2l conversion wiring, have a PMS 3.2l to 914-4 conversion cable but... Options

[jim912928]

Well, I have all of the mechanical work done for my 3.2l motronic conversion. Now I'm trying to figure out the wiring. I purchased the Patrick MotorSports conversion harness a few years back. It allows me to eliminate the relay board. However, electrical is not my forte...so I have some real questions on the "trunk" wires from the 3.2l harness and what to do with them. The engine, dme and wiring harness are all from the same car. So, here are my questions and you can relate them to the pictures as shown:

1. picture named "DME help" circle #1: by the dme connector...there are two little stub connections that seem to come out of the DME connector and both wires are brown....do these need to go to anything?

2. picture named "Trunk help" circle #2: I marked these fuel pump...do I cap these because I'm using the 914 wiring or do I need to connect them somewhere?

3. picture named "Trunk help" circle #3: I marked this positive battery...does the 914 harness cover this or do I need to connect it to the battery also?

3. picture named "Trunk help" circle #4: green and green/yellow wire...have no clue what this is?

4. picture named "Trunk help" circle #5: black wire by the wires I labeled "fuel pump"...have no clue what this is?

5. picture named "Trunk help" circle #6: white connector with a black, black/purple and yellow wire...have no clue what this is?

I also would like to know where you usually mount the DME and where do you pass it through from the passenger compartment into the engine compartment..and once on the engine compartment side...where do you route it up to the engine? Have pics from those angles?

Thanks all in advance!

Jim

DME help:


Trunk help:

[shoguneagle]

The Patrick Jumper just takes care of the 14 pin connector; it does not take care of how the wiring goes for fuel pump, key power, starter, fuel pump/DME relay, etc. It appears to be an excellent product and does the job of matching the necessary wire changes involving that connector.

As soon as we get Jim and Mark taken care of and have their feed back, we can put this on the thread. We need to ensure the focus is right and the information is correct as it can be represented.

Once this period and information is completed, then I would be happy to send the complete information/drawing/schematic to someone who will put it as an attachment to the thread.

Remember we are dealing with the 3.2 Motronic engine and its wiring characteristics/connections. The years I believe are 1984-1989

I will be validating my connections to ensure we are correct and would appreciate info from Jim and Mark after they receive a package I am sending them and validate it. Other considerations should possibly include schematic of fuel pump, DME/fuel pump relay, and wiring considerations as they apply to the connection consideration. If you do not use the Patrick Jumper, then the information I have listed previously that apply to the actual wire changes at the 14-pin connector need to be validated and understood.

Some people may choose to use part of the relay board functions; this should be addressed.

Again, I want the emphasis should be given to the numerous people who have made this engine change into 914s and early 911s. The schematic/diagram was on one of the older Pelican threads and they should get full credit for their time and efforts in making the drawing. Many people have contributed to threads on all the 914/911 boards and have provided much of the background and insight into the necessary changes. I wish I could remember all their names and the actual work they have done in order to get credit and acknowledgement.

Thank you to those "contributors" because I would not have my car conversion almost complete; the schematic/diagram really gave me insight into wiring the 14-pin connector (I did not use Patrick's); how the tach and fuel Pump relay/DME relay were connected and controlled the Motronic fuel injection system; and how the key power (start only, and start/run positions) were connected. There may be other items that are needed into this thread including procedures and what is needed. Hopefully, these will come out as we try to finalize this thread so anyone who is doing/going to do a 3.2 Motronic engine exchange will have some type of up-to-date valid information.

If this is the type of information you need/want, then we should take this opportunity to try to document this thread. Remember many people have provided much of the information on 914world, 914club, Pelican (914 and 911 boards) and many others and for these efforts they are the ones who deserve the credit for any final information. They are the ones who have done this activity and did provide information as we may be able to provide here.

If you see the need for this info, I will need help from Jim and Mark to make sure it gets completed and listed on the board, or any of the boards we use as members.