leespiro 9 Posted June 18, 2013 Report Share Posted June 18, 2013 hi all is there a guide on here for convert my golf mk3 vr6 2.8 from obd1 to obd2 i have all the bit and bots cheers Link to post Share on other sites
VR6Pete 1,455 Posted June 18, 2013 Report Share Posted June 18, 2013 Hi mate, it should be fairy plug and play if you have the bits...might be easier to start with what bits you have already.I did an obd1 to obd2 upgrade on my corrado, but its much easier on a Golf Link to post Share on other sites
leespiro 9 Posted June 18, 2013 Author Report Share Posted June 18, 2013 does the dash have to come out Link to post Share on other sites
VR6Pete 1,455 Posted June 18, 2013 Report Share Posted June 18, 2013 nope, just loom from back of fuse box, to multi-plug on engine, and the engine harness needs to be replaced with your OBD2, lamba is different, so is the MAF, throttle body, possibly the FCM too, late VR's also had 3 sensors on the thermostat housing..the loom can be fed through the gromit into the cabin, but I had to remove brake servo to get access. Link to post Share on other sites
leespiro 9 Posted June 18, 2013 Author Report Share Posted June 18, 2013 thanks gonna give it a go Link to post Share on other sites
VR6Pete 1,455 Posted June 18, 2013 Report Share Posted June 18, 2013 should be straight forward mate, do you have all the alarm gubbings as the OBD2 ECU will need the key chip, transponder, alarm box from the same car you had the ECU from. only other option is to send to stealth and get immobilizer function deleted Link to post Share on other sites
leespiro 9 Posted June 18, 2013 Author Report Share Posted June 18, 2013 on my obd1 i have a clifford concept 650mk2 and the obd2 not sure wat it is but there not factory Link to post Share on other sites
VR6Pete 1,455 Posted June 18, 2013 Report Share Posted June 18, 2013 I have the same on my Corrado, and it still works perfectly, I just needed to chop the bonnet switch into the engine harness again. Didn't have to touch anything else, but the OBD2 ecu will have an imob, so if your car starts for a couple of seconds and cuts out, and VAG-COM indicates "engine start blocked by immobilizer" then that's your problem Link to post Share on other sites
leespiro 9 Posted June 18, 2013 Author Report Share Posted June 18, 2013 also my car has remote start Link to post Share on other sites
leespiro 9 Posted June 21, 2013 Author Report Share Posted June 21, 2013 how much does it cost to get the immobilizer off? Link to post Share on other sites
UnitedMotorsport 55 Posted June 21, 2013 Report Share Posted June 21, 2013 how much does it cost to get the immobilizer off?We can do it for £80 inclusive of return postage. Link to post Share on other sites
leespiro 9 Posted June 21, 2013 Author Report Share Posted June 21, 2013 not sure if its worth changing over to obd2 wont it just be the same if you just map the obd1 ecu Link to post Share on other sites
VR6Pete 1,455 Posted June 21, 2013 Report Share Posted June 21, 2013 OBD2 is a totally different management system, its not the equivelant of remapping an OBD1, having driven OBD2 cars for the last 10 years, it was a real disappointment to jump into my OBD1 Corrado VR6, its now a joy to drive and idles a lot smoother and pick up is more responsive.Its a doddle on the Golf to do, you wont have the hassle I had with my Corrado, chopping looms up and making new ones etc...Pete Link to post Share on other sites
leespiro 9 Posted June 21, 2013 Author Report Share Posted June 21, 2013 ok ive got the key transponder will the ecu still need immobilizer bypass Link to post Share on other sites
leespiro 9 Posted June 21, 2013 Author Report Share Posted June 21, 2013 ok ive got the key transponder will the ecu still need immobilizer bypass Link to post Share on other sites
UnitedMotorsport 55 Posted June 21, 2013 Report Share Posted June 21, 2013 ok ive got the key transponder will the ecu still need immobilizer bypassFor the immo to be released on the ECU, you need matching keys, immo box and ECU. Link to post Share on other sites
leespiro 9 Posted June 22, 2013 Author Report Share Posted June 22, 2013 hi how do you remove the brake servo from the pedal im stuck there Link to post Share on other sites
leespiro 9 Posted June 22, 2013 Author Report Share Posted June 22, 2013 also can get the fuse box low enough to see what plugs take out the engkine loom Link to post Share on other sites
Lukey. 381 Posted June 22, 2013 Report Share Posted June 22, 2013 There's 2 plastic levers holding the fuse box in place undo them and it'll come down quite a way. Link to post Share on other sites
leespiro 9 Posted June 22, 2013 Author Report Share Posted June 22, 2013 ive done that cant get it low enough to see which ones are the engine loom connect to the boxalso u know how to get the brake pedal off the brake servo Link to post Share on other sites
leespiro 9 Posted June 23, 2013 Author Report Share Posted June 23, 2013 sorted got the odb2 loom in bit of a nightmare but it done also is the immobliser in the ecu or is there a seperate box where does the wire goto for the transponder Link to post Share on other sites
VR6Pete 1,455 Posted June 23, 2013 Report Share Posted June 23, 2013 There's a seperate box mate. Link to post Share on other sites
leespiro 9 Posted June 23, 2013 Author Report Share Posted June 23, 2013 ok where this box located and does the transponer go into that separate box Link to post Share on other sites
leespiro 9 Posted June 27, 2013 Author Report Share Posted June 27, 2013 hi ive got my odb2 loom now in my golf my fuel pump is not working ive got a spark and its starts with easy start i ead that later vrs dont have the fuel pump relays can any of you guys help Link to post Share on other sites
leespiro 9 Posted June 27, 2013 Author Report Share Posted June 27, 2013 hello ive got the car running now i had to take out the 109 relay also the car is running rough on idle could this be that ive put the 4 bar fpr on will this get sorted after its mapped Link to post Share on other sites
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