16v conversion

hi there new to the site, just bought a mk2 16v engine for my mk1 gti cab and was wondering how hard it is to do, i have full wiring loom,both ecu's,gearbox and shafts do i need any of these cos all my original wiring wires upto the 16v engine apart from two plugs which are throttle position sensor and i dont no wot the other one is called, i am doing this myself so any help would be great cheers

in the middle of engine swap from a mk2 1.8 16v (87) into a mk1 1.1 C (82) and the only thing that needs wired up to make her run is this loom



the wur .ect. dont need wired up to make her go

what year is your cab?  do you know if it runs on k-jet or digi injection?

Sellers said

what year is your cab?  do you know if it runs on k-jet or digi injection?

my car was 1982 on a y reg carb

mines an E reg gti cab was running on 1.8 8v k-jet system, wired it all up today and all the plugs wired straight up to the 16v no problem, i just need a engine mount, plumb up the fuel lines and modify the 16v manifold onto my original exhaust  then she should be ready to go

sounds good m8 keep up the good work

hi there was wondering if you have got yours running? tried starting mine today and my fuel pump has no power going to it but there was before i took the engine out so i wired it up so it was running constantly and she still wont go so i dont no if i have to wire up the other ECU or not im real stuck and i dont no anyone who knows about these things

does it have a spark ? is it getting fuel .ie. plugs wet??

hi there all sorted now found the problem why it wouldn't run i put the fuel lines on the wrong way round, swapped them over and she runs im well chuffed did it all myself and wot made it easier was all the wiring swapping over, sorted

cardboarddave said

hi there all sorted now found the problem why it wouldn't run i put the fuel lines on the wrong way round, swapped them over and she runs im well chuffed did it all myself and wot made it easier was all the wiring swapping over, sorted

good good m8 nothing better than doing a job your self any pics of you car

hi there again do i need to wire up the ecu in for mine to work? if so where does the little suction pipe from the ecu go to ??

the vacum pipe that goes to your servo m8

cheers for that, does that mean i have to wire the ecu up or you not sure? read up somewhere that the ecu is for the ignition timing

cardboarddave said

cheers for that, does that mean i have to wire the ecu up or you not sure? read up somewhere that the ecu is for the ignition timing

You have to wire up the ECU to get the thing to spark! If you use the previous ignition stuff (eg from stock GTI), then you'll have no vacuum or mechanical advance. The stock GTI uses a dizzy that does this, the 16V's dizzy doesn't have this and its done by the ECU.

i have used the original wiring and it does spark but like you said there is no advance or anything could this be the reason the engine is locking up wen its turning over or the reason why it run lumpy when it did start, do you thik i would be better off starting again wiring in the ecu

the pic on the other page shows the loom you need for it to run ok

cheers for the advice, wired up the ecu today and wot a belta, started up without the engine locking up, run a bit lumpy for a minute or two but then ran fine right upto temp, didnt wanna switch it off then i did and it didnt wanna start after that at all, had to bump it off and ran real crap,(need to put the advance and retard pipe on from the ecu) just wondering wot it could be if it dont start wen hot, pulled out an injector and no fuel wen hot, didnt try it wen it went cold, dont get me wrong am chuffed it ran but i thought it was as easy as engine in wire it up and she be away but i was wrong dont wanna give up on her but i got another car that i gotta get on the road, sorry for going on and on am desperate to sort it

have you put the temp sensor on the side of the head its blue + white ,+i would put the advanced pipe on the ecu , as for fuel my cars fuel pump is on the igniton so when i put my igntion on the pump is on constant,  check your fuel pump is coming on  also check the realy hope its one of these thing m8 keep at it youll get it together in the end i did  

You can use a System Porsche dizzy from a series 1 Seat Ibiza if you don't want to bother with the ECU - fit this with a Pug 205 GTI dizzy cap (the one with the bend).

Advance curve isn't perfect but it's near enough.

give it  another quick turnover today and nothing, theres fuel, temp sensor is on and ecu all wired up, puzzling me on how it ran yesterday for ages and soon as i switched it off wen hot she hasnt run since, does anyone no of any veedub specialists in the east riding area ? or no of anyone in this area that has done this conversion with sucess, i could do with someone to have a look and shed sum light on the situation, has anyone had these problems before