Mp9 vs Mpi wiring (diagrams)

[Aveezy]

I bought a computer box with the plug but previous owner cut it (don't know why) anyway i want to rewire a snake/short harness as i'm changing to mp9 from carb
I have a few plugs and if not ,ill get whatever is needed also know that the ecu box is decoded
(golf 1.8 carb to 1.8 fuel injection)

ecu box to -

ignition
fuel rail harness with map sensor
fuel pump
lift pump
distributor
throttle
and whatever else needs to be connected

can Some 1 please give me either a diagram or advice or any kind of help please

thank you

[UDC]

topic discussed enough times, a quick search found the below, go through it, should clear up most of your questions.
Also you don't need to wire up the ignition ring when using a decoded ecu, unless you plan to use a coded key and ecu.

http://vwclub.co.za/forum/viewtopic.php ... 3&p=328763

http://vwclub.co.za/forum/viewtopic.php?f=3&t=106913

http://vwclub.co.za/forum/viewtopic.php ... &p=1655428




Wiring needs to go to the below sensors

throttle body
map sensor
injectors
knock sensor
3 pin coil
distributor
4 pin water temp switch
Fuel pump relay

[Aveezy]

thanks UDC ,will look in to that

[Aveezy]

1 Thick Brown
2
3
4
5
6 Pink/white
7
8
9 Pink
10 Powder Blue
11 Red/Black
12 Grey/Blue
13 Yellow/Red
14
15 Black/Red
16 Grey/Green
17
18 Black/Green
19 Green
20 White
21 Red
22 White/Black
23 Thick Black
24 Grey/White
25
26
27
28
29 Brown/Blue
30
31
32
33
34
35
36
37
38
39
40 Purple/Black
41 Blue/Yellow
42
43 Black
44 Black
45 Red
46
47 Powder blue/White
48
49
50
51
52
53
54 Lime Green
55 Yellow
56 Lime green/White
57 Red
58 Grey
59
60 Black/Blue
61 Black/Green
62 Silver/Black
63 Red/Yellow
64
65 Yellow
66 Green
67 Black
68

[Aveezy]

Guys as you can see my pins doesnt match as per UDC posts ,not sure what to do ,do i remove the pins and put in correct order or does some1 maybe know why mine is this way? I have a 1.8 carb block that im fitting a 1.8i mp9 head ,my box is decoded so i need to run this harness to all the correct places but not sure where the pins go

[UDC]

Wait hold on that ecu plug has 3 rows, mp9 ecu only has 2 rows.
Does the ecu itself have 3 rows of pins, if so I suspect you have a mpi ecu and harness plug.

No sure on the mpi wiring honestly, its similar to mp9 but with differences and has a lamda etc etc, not even sure anyone on here has converted to mpi

[Aveezy]

mine has 3 rows which came with the computer box ,i tested my computer box in my cuz polo 1998 1.6i and it started but switched off ( im guessing mine isnt decoded) as for the harness im not sure what car it came from ,the guy i bought it from said it was mp9 but my pins dont match mp9 setup ,all this is really making me go closer to Dicktator!!! by the way i managed to get a golf 3 tank as per your build UDC ,thank you will follow steps further

[Aveezy]

okay after some fast research ,found out it is MPI from a tenaciti ,so i guess that changes alot ,will this head still work with my carb block though?

[UDC]

Head etc will work, only issue you have going mp9 is the ecu plug

[Aveezy]

Okay so here is my new plan

Dicktator runs my complete mpi head with map sensor and injectors ,3pin coil ,mpi distributor ,golf 3 gti tank with pump and bypass all other sensors

Will this work? Or am I missing something?

[Torker]

Okay so here is my new plan

Dicktator runs my complete mpi head with map sensor and injectors ,3pin coil ,mpi distributor ,golf 3 gti tank with pump and bypass all other sensors

Will this work? Or am I missing something?

It will work, you just need to trace the wires, I did a plug and play conversion on a MP9 with my Velo.

[Aveezy]

Thanks guys

[Aveezy]

Sup guys ,quick question ,finding out that I have a mpi harness ,is the computer box still the same? If I were to get a mp9 harness and decode my computer box ,will it work? Or will I have to change harness and computer box

[UDC]

Basically for mp9 you need the below
mp9 ecu which needs to be decoded and remapped to engine cc
mp9 wiring harness
Throttle body, map sensor,
4pin water temp sensor,
knock sensor,
fuel rail with injectors and fpr,
3 pin coil,
4 window distributor without vacuum advance,
3 bar fuel pump

[Aveezy]

Okay but I have a 1800 carb block ,I know my head has a map sensor ,injectors all connected to a fuel rail harness ,I do have a distributor ,3 pin coil ,golf 3 gti tank with pump and throttle but as for

Fpr
Knock sensor
4pin water temp switch

Will this work on my carb block?

[UDC]

fpr = fuel pressure regulator, fits at the end of the fuel rail, silver round gadget with a vacuum pipe stem
knock sensor bolts unto the block
4 pin water temp fits onto a plastic water flange which bolts onto the head, the flange is available at most spare shops

yes it will work on the carb block.

[Aveezy]

Thanks UDC ,appreciate all the help

[aristo92]

I bought a computer box with the plug but previous owner cut it (don't know why) anyway i want to rewire a snake/short harness as i'm changing to mp9 from carb
I have a few plugs and if not ,ill get whatever is needed also know that the ecu box is decoded
(golf 1.8 carb to 1.8 fuel injection)

ecu box to -

ignition
fuel rail harness with map sensor
fuel pump
lift pump
distributor
throttle
and whatever else needs to be connected

can Some 1 please give me either a diagram or advice or any kind of help please

thank you

Sorry for hijacking your thread but wanted to ask how much this conversion ended up costing you?

[Aveezy]

@aristo92 . Sorry man only seen your Message now . Its costing me +-R5000 but im doing everything myself . Got some quotes from guys who will do the whole conversion for around R12000 . The most difficult things to get for this conversion is a decent snake /short harness . Hope this helps

[al-qaasim]

Hi there

Would you mind sharing the pinout for the SHurlock MPI? I need to also convert from MPi to Mp9.

Thanks

[missioner]

Hi there

Would you mind sharing the pinout for the SHurlock MPI? I need to also convert from MPi to Mp9.

Thanks

He doesn't know the pin out for the harness. That info is unobtanium unless you have a connection at the dealers.

The links provided on the first page will give you info regarding the MP9 system which may help you wire the ECU if you have it already.

[Aveezy]

@ al-qaasim from what i managed to learn this pass few months is that you have to either change the whole engine harness from mpi to mp9 or change the ecu plugs from mpi to the 32pin mp9 plug .I have a guy who can wire the plug for you if your interested and he can source you with either the snake harness or plug and i have a decoded mp9 computer box if you ever looking for 1.

[Aphiwe17]

Guys I need help I just changed my 1.4 1400 mpi engine to 1.8i mp9 engine.. The engine starts but has rough idling so I'm planning on converting it to mp9... Now that's where the problem is, I don't know how to change the ecu plugs and matching the wires