OEM management wiring: 1.8T => Mk2 harness install FAQ

Speak To the Rubjonny fella

 

Cheers for the reply. I'll drop him a message

 

Can anybody send me the pictures to the 20vt wiring guide as they seem to be missing. Thanks in advance!

John

 

Need help guys what's the cause of the rpm been stuck at 3k while running?? And oil light constantly flashing even tho I think there all hooked up correctly ,,polo 1998! Aum swap

 

I'll check that out 1st thing

 

I have checked the throttle and that is fine do you think I would need to put a resister in line to bring the rpm down and work,??
also I think I need to change the oil sensor and put the polo afh one in as that's what clocks are still in

 

Building on this excellent thread, another sticky has been created that covers not just 1.8T ME7 electrics, but also other engines using in MK4 based vehicles.

You can find it >>here<<

 

Hey guys couple questions if anyone has any input. 1986 jetta with an awd 1.8t running ce2 wiring and fusebox, so i wired everything up according to the pinouts that 20vjimmy had given. The car cranks and has fuel at the rail and good pressure and spark. Injectors have power but are not firing and my fuel pump is not turning on with ignition only if the relay is bypassed. Any ideas? Planning on taking the wiring back out and relooking over everything. Some of the directions were a little confusing so i think i wired something wrong thanks guys!

 

Thank you for getting back to me! It is dbw and i have the ecu constant wired from pin 4 of the brown connector to y, pin 4, and then the switched live to g1 pin 4 from pin 1 of the brown connector so there is no ecu relay. And my harness is from a 2000 jetta so would that fall under the category of a newer style harness or old? Because i see that you have seperate ways of wiring depending on how old the harness is. Much aprreciated!

 

Rubjonny i totally spaced out the ecu relay is the one that usually the grey relay that sits right next to the SAI relay in the mk4 engine bay correct? If so then yes i still have it and there the relays is there

 

So if i was to only hook up what was needed to start the engine and have it run, would this be correct?
Brown connector
Pin 1 to g1/4
Pin 2 to g1/3
Pin 4 to g2/9
Pin 5 to g1/8

Blue connector
Pin 1 to pin 6
Pin 2 to pin 1
Pin 3 to pin 2
Pin 4 to pin 3
Pin 5 to pin 4
Pin 6 to pin 5

T14a connector
Pin 6 to g1/8
Pin 5 to z1
Pin 8 to g1/10
Let me know if this looks right eager to tear in thanks again

 

Okay awesome so ill just leave pin 8 on t14a alone then. Thank you for the help ypye awesome ill let you know how it goes after work!

 

Also i had the T6/4 going to the Y/4 slot for the ecu power, can i keeo it like that or should i connect it ti the G2/9 spot?

 

Hi there ,

I'm not the excellent with engine looms , but I would need some help to wire my mk1 cabby with my 1.8t.

Correct me If I'm wrong , but this is how I would set it up.

Brown connector T6 + Blue connection T10 , T14a Unused , White unsused , Orange unused.

Where does the ECU and the looms gets his 12v constant and 12v live ? Thanks