3.2 digi (abf) into 90spec mk2 wiring help

[Simeon]

No, holding throttle open has no effect. I'm thinking it might be fuel starvation .. weirdly, it fires up for a second or two the first time I try and start it after leaving it overnight (or similar time), but then returns to it's single cylinder firing every now and then. Only other thing I've done is extend the ecu loom so that I can locate the ecu in the standard location for the mk2, but all joints were soldered and wrapped so should be ok.

The miltek doesn't slide inside the 2.25" exhaust fitted to the car and it is supplied with 10mm bolts that don't fit through the holes in the downpipe nor through the standard gasket .. it's clearly not been designed to be a simple cat replacement pipe and I certainly won't be buying one for my G60 conversion. Wish I'd bought a cheapo hottuning one now.

[rubjonny]

hmm i didnt get any bolts with mine i used new oem vw ones which are M8. the slidy thing is more likely to be your exhaust rather than the miltek.
did you get the short extension piece which goes between the exhaust and the cat bypass?  you might need one of those double coupler things for yours I guess...  mine i just used the extender piece and my jetex fitted straight on like a glove

[Simeon]

Extender piece makes it too long, have had to cut down the decat by just over an inch already. Anyway, will get some m8 bolts and hammer it on tonight

So, before I call in help is there anything I can check easily or is stuff like crank sensor just replace and hope it works?

Cheers

[rubjonny]

dunno then chap i cant explain why it aint fitting!  what exhaust are you using?

is the main pump definitly working? in an ideal world get vag-com plugged in and see what the ecu says plus you can go thru the measuring blocks to see what all the sensor readings are.

[Simeon]

Good point, forgot about vagcom .. not used to such modern engines Will try and get someone to check it for me. Thanks for all the help and advice.

Oh, re the fuel pump, I can hear it prime when I turn the key, but it doesn't always do it; after spinning the engine over a few times if I turn the ignition off then back on again it doesn't prime every time. Is that normal or perhaps an indication that the fuel is not being supplied properly? The fact it has started suggests that the wiring is correct and as you say, the immobiliser won't stop it starting, so I'm thinking it must be fuel 

Edit; the exhaust will fit in the end I'm sure, just wasn't expecting to have to fiddle with it so much that's all.

[rubjonny]

this is normal, the ecu is pretty clever about managing the priming

do you hear the pump running as the engine is turning over? if not this could be down to a dead crank sensor.

next step i would do is pull the plug off the under car pump then try again, check to see if you can hear the in-tank pump prime.

[Simeon]

In tank pump should be ok, the car ran fine before I pulled the kr lump out, but will double check. Not sure about the pump running when the engine is turning over, exhaust isn't connected so hard to hear much Will check that too. Thanks for the suggestions.

[Simeon]

And ... sorted

In case you've done a search and have a similar problem I suggest you check your timing marks and presume the previous owner to be an idiot.

Thanks again John for all the help and advice

[Simeon]

Finally finished this conversion today, my mate has now collected it and driven it 150 miles home and all seems well apart from it takes a while to return to idle .. drops to a about 2k revs then stays there briefly then slowly drops to 800rpm. Believe this is likely to be the ecu water temp sender ? so will get that changed soon

[ramjet]

Hi Sim and Rubjohnny,

Im still trying to sort my rev counter.I fixed the mk3 clocks,revs work.I have joined all the wires in and spliced up till the fuse box.Now im not sure about the TCI(which part is that).Also the 6 pin plug,im not sure if its in.I did it with the help of the mechanic.

Feels very light,it starts and runs normally.But noe revs.You say the wires from mk3 green and red join in with mk2 black/red wire.Am I right?Please guide me.Earlier I had an ABF engine using my old digi 2 system.Now im on a Digi 3.2 I think from a 1994 LHD car.The exhaust manifold seem diff as with the inlet rubber bellow.Seems thicker than the RHD ones.

Any help will be very much appreciated.Thanks mate...

Best regards