Idling problem

[braco]

I have my mk2 for about 5 years,motor start to be tied (270000km) and i dicide to put 2.0lt. Motor in it. All job been done only i have problem with idling, i instoll new temp. Sensor (blue one) new idling reg. But still rews going up and down (1000 - 1300).i used 2.0 bottom and head from 1.8, down pipe and catal.converter from 2.0lt. I had this problem before i redone motor. If any body can give me advice what i have to check i appreciate.

Thanks braco

[VwJunkie]

Hey mate,

Sounds like your ISV might need a clean. Get yourself some carby cleaner and throttlebody spray and that should do the trick!

[velly_16v_cab]

yep, what he said above

the connector on the back of my ISV came off two days ago causing be to brack down on the way home from work...spotted it, plugged it back in and ran fine.

[MK2 GTI]

yep, what he said above

the connector on the back of my ISV came off two days ago causing be to brack down on the way home from work...spotted it, plugged it back in and ran fine.

I think your plug is missing the metal clip that holds it on.

[velly_16v_cab]

I think your plug is missing the metal clip that holds it on.

yeah it is bro...i blame the person who last worked on it TBH

[braco]

thanks gays i found broken wire on back of ISV, now idling OK.

[joshyd-mk2gti]

nice detective work gays

[velly_16v_cab]

[Spyda]

nice detective work gays

hehehehehe

[braco]

Hi guys,
I am back! I tryed my car today for the first time with the 2.0lt motor, and I can see a big diference. There is more torque in low revs and more power. It still needs fine tuning but its working OK. If any of you guys want to do a conversion to 2.0lt, I can give you information on the process and parts needed.
Now, I have one more question:
I remember WV had recall for heating core, factory install bypass switch on heating core hoses. Anyway, my switch is blocked and doesn't work. I removed it and connected the hoses straight to the heating core. I want to know if anybody has experienced this also? If so, can you please advise me on a better alternative.

Thanks, Braco.

[h100vw]

The bypass mod was done to stop them from bursting. The later cores were better made and didn't blow. You should be able to get some new ones from VW or maybe Imparts.

Gavin

[Golf Loon]

If the core bursts it can burn your passengers legs in extreme cases. Unlikely though and as Gavin says the later cores were better made, so if it has ever been changed, you should be ok.

I have heaps of the bypass bits here if you get stuck.