MPFI on auto converted Sedan...

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Old Aug 26, 2010 | 10:02 PM
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sabideefoo's Avatar
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From: Hickory, NC
Default MPFI on auto converted Sedan...

Hey guys..Most of you have been answering my questions and that I thank alot. I have already done the "5 spd swap" on my car and already did all the auto to manual start stuff like rywire.com says to. now over to the ECU location see paragraph below..

"Tried and true method
-Pins B10 and B12 are empty meaning there are no wires going into them as a general rule, however some models have a wire at B12 (if you have one that is one there that is one less wire you will need to move).
-Pins B2 and B11 have wires going into them but they are not used for anything on most cars (see Automatics and Exceptions above).

-Take the pin/wire from B2, de-pin it (this means pop it out of the plug) and pin it (pop it into plug) into B10's empty spot, how you have a wire at B10.
-Take the pin/wire from B11, de-pin it and clip it into the B12 spot, now you have a wire at B12.
-Cut the orange C1 wire and white C2 wire "in half" (by cut in half I mean cut the wire making sure to leave enough wire so you can strip and solder them to another wire later). Now when dealing with cutting I will refer to the side of the wire coming from the interior harness as the harness side, and I will refer to the side of the wire coming directly from the ECU's plug (direct ECU connection) as the ECU side (the only plug in question for this step is the ones that go into the ECU).
-At the ECU plug, for C1 and C2 solder and heatshrink wires to them and run them into the engine bay (I did this via the A/C grommets). Mark these wires with a piece of tape saying C1 and C2 on it. Because if you are like me you were using black wire which all looks the same so you need to make sure you know which is which.
-Now connect and solder the ECU side of B10 onto the harness side of the orange C1 wire, then do the same for the ECU side of B12 and the harness side of the white C2 wire.
-Cut wires at A3 and A7, solder and heatshrink wires to the plug side of A3 and A7 and run them into the engine bay, make sure you mark them. Now you should have 4 wires running into your engine bay. "


Now see were I highlighted the red area...IF I have a auto wiring harness does this apply to me? Remember I already the part from Rywire.com page where I loop some wires on a plug at the shifter location. This is so I can remove my Key and Start the car...So with that said...yes or no? Do I have to go another route?

Further info from: http://www.fourthgenhatch.net/mpfi.h...tos-exceptions

Automatics and Exceptions (this is where it gets me...)
On an automatic car (using an auto ECU), pin B11 is wired to your shifter position switch, D4. Since you won’t be moving that pin, you will need an extra ECU pin. If you're using the tried and true "cut" method, put the extra pin in B12. If you're using the "switch" method, put it in the C2 position. Other than this, the rest of your conversion should be exactly the same.
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Old Aug 26, 2010 | 10:18 PM
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sabideefoo's Avatar
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From: Hickory, NC
Default Re: MPFI on auto converted Sedan...

Please allow me to try and answer my own question because this guy reads more!! LOL

Since my harness is auto...I'll just have to source some OEM wires with the pins to put into slots c1 & c2 for the dizzy. and leave all the Auto wires at b2 b11.....The writeup was just saying that if I need wires with pins to take them from b2 and b11. Am I on the right path of righteousness haha? I better reach "enlightenment" after this conversion is said and done!
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Old Aug 27, 2010 | 04:56 AM
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jlk16188's Avatar
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From: PA
Default Re: MPFI on auto converted Sedan...

I just did the same swap you are trying to do...

what you need to do is cut the existing wire in the b12 slot (i think its b12) which would normally be empty on a factory 5 speed car and splice it to the correct wire you ran from your engine compartment. Then de-pin only one of the "spare" wires as outlines in the diy and put it in the other currently empty B slot and connect that to the other wire you ran


its simple, just nerve racking not knowing where that mystery wire goes but it all works out perfect. I did a 5 speed swap and dropped a zc motor with a mpfi swap into my dx automatic about a month ago and its been running perfect for 4000 miles so far
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Old Aug 27, 2010 | 07:28 AM
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graveltravel2's Avatar
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From: birmingham, AL, usa
Default Re: MPFI on auto converted Sedan...

and im currently doing the same thing on my auto to manual converted car.
theres a white wire with a red strip thats in either b10/b12....
cut it. thats the wire that isnt there on manual cars,and connect and solder what ever wire goes into there....the orange or white wire.. sorry i cant remember at the moment....
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Old Aug 27, 2010 | 10:31 AM
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sabideefoo's Avatar
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From: Hickory, NC
Default Re: MPFI on auto converted Sedan...

Supa Thanks!!!!
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