Jump to content
  • When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Recommended Posts

so im collecting parts for the EFI conversion, and i was goin thru my wiring harness today and I know that i need to hack up the harness a little.... but which ones do i cut off? ive been gogling this for days and i thought i would be able to figure out by just looking at the harness, but im worried about cutting something off i need,

 

 

does anyone know what plugs i need? i know injectors, AFM, TPS, cold start, ECU, but is there more?

 

all help is appreciated in advance!!

Link to comment
Share on other sites

What "harness" do you have?  IF you are talking about the stock wiring harness from your carbureted 2002, you don't really need to "hack up" anything.  The car needs to supply power (+ & -) to the EFI system and you will have a wire coming from the ECU to give the Tach a signal,  everything else is unique to the new system.  IF you are using the distributor you will need to connect to it (and also hook to the coil) 

 

What EFI system are you using?  The EFI system needs a completely separate wiring harness that connects to all of the injectors, AFM, temp sensors, engine position sensors, ECU, ignition (single coil with distributor or multiple coils direct to plugs), fuel pump, tachometer and the ignition switch to supply it with power.   

1970 1602 (purchased 12/1974)

1974 2002 Turbo

1988 M5

1986 Euro 325iC

Link to comment
Share on other sites

^^^ i have all 130 pages printed out... its kind of overwhelming go to through....

 

was hopefully looking for something simpler. 

 

like all i should need to leave on the harness should be, ECU, injectors, AFM, coldstart. TPS, and the 3 relays.

Link to comment
Share on other sites

e30 m10 dont have a CPS i thought... plus from my research it says i can use the stock ignition. all the ECU is gonna be controlling is air and fuel.

 

does that not sound right?

 

yeah i need a o2 sensor. this might end up being a giant experiment....

Link to comment
Share on other sites

When I did my 318i EFI conversion, I completely disassembled the harness and was able to eliminate about two-thirds of it.  I made a drawing of what remained of the harness and it accompanied a nice how-to article re: this conversion written by Mike Kubani that were in the "old" FAQ how-to articles.  However, after searching for it I couldn't find it.  Either it fell by the wayside when the "new" FAQ was created or I didn't look in the right place.  Hopefully someone can point you in the right direction as both the article and drawing pretty much spelled everything out. .

Link to comment
Share on other sites

When I did my 318i EFI conversion, I completely disassembled the harness and was able to eliminate about two-thirds of it.  I made a drawing of what remained of the harness and it accompanied a nice how-to article re: this conversion written by Mike Kubani that were in the "old" FAQ how-to articles.  However, after searching for it I couldn't find it.  Either it fell by the wayside when the "new" FAQ was created or I didn't look in the right place.  Hopefully someone can point you in the right direction as both the article and drawing pretty much spelled everything out. .

Is this the article to which you refer? It's in the "Articles" section.

-David

1972 2002 - 2577652 Follow the fun

Link to comment
Share on other sites

i have that printed out as well, haha. i read about once to twice a day just to make sure there arent any small things i missed.

 

my biggest concern is i dont want to cut off an important ground wire and end up blowing out the wiring or the ECU and then be stuck.

Link to comment
Share on other sites

If I still had the digital file of the wiring diagram, I'd be happy to post it.  Unfortunately, this drawing was done approx. 15 years ago if my memory serves me and that file has long since disappeared.  There was a copy attached to Mike Kubani's original article but evidently went bye bye when the new FAQ was created.  Maybe Steve K. can retrieve it and re-attach it to the article.

Link to comment
Share on other sites

the best way is to do that is build your own harness and wire it in as a stand alone system if your doing a DIY autotune or megasquirt really the only circuit you want to use from the OE harness is the ignition switch from the backside of the fuse panal. 

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • BMW Neue Klasse - a birth of a Sports Sedan

    BMW Neue Klasse - a birth of a Sports Sedan

    Unveiling of the Neue Klasse Unveiled in 1961, BMW 1500 sedan was a revolutionary concept at the outset of the '60s. No tail fins or chrome fountains. Instead, what you got was understated and elegant, in a modern sense, exciting to drive as nearly any sports car, and yet still comfortable for four.   The elegant little sedan was an instant sensation. In the 1500, BMW not only found the long-term solution to its dire business straits but, more importantly, created an entirely new
    History of the BMW 2002 and the 02 Series

    History of the BMW 2002 and the 02 Series

    In 1966, BMW was practically unknown in the US unless you were a touring motorcycle enthusiast or had seen an Isetta given away on a quiz show.  BMW’s sales in the US that year were just 1253 cars.  Then BMW 1600-2 came to America’s shores, tripling US sales to 4564 the following year, boosted by favorable articles in the Buff Books. Car and Driver called it “the best $2500 sedan anywhere.”  Road & Track’s road test was equally enthusiastic.  Then, BMW took a cue from American manufacturers,
    The BMW 2002 Production Run

    The BMW 2002 Production Run

    BMW 02 series are like the original Volkswagen Beetles in one way (besides both being German classic cars)—throughout their long production, they all essentially look alike—at least to the uninitiated:  small, boxy, rear-wheel drive, two-door sedan.  Aficionados know better.   Not only were there three other body styles—none, unfortunately, exported to the US—but there were some significant visual and mechanical changes over their eleven-year production run.   I’ve extracted t
  • Upcoming Events

  • Supporting Vendors

×
×
  • Create New...