AGG engine revving issue

[Valere Oddoux]

Hi all,
I have 2x golf cabrio with AGG engines, (97 MK3 and 98 MK3.5) the 97 is playing up!
When I start it, it revs up 3 or 4 times to 2000 plus rpm and then settles down to 1100 and stays there!
I have swapped just about everything from the 98 to the 97, ( throttle body, maf, air intake hose, air filter and body and sensor, heat sensor) the 98 still run fine with the 97 parts and the 97 still misbehaves.
I'm at a loss!
The crank angle sensor has been replaced before.
Please help
Val

[itavaltalainen]

ECUs swapped over?

[Valere Oddoux]

Thanks,
Any tricks when doing that? Do they need to be reset to the car and how? Because I've swapped then and now I have two car that don't start.........

[lemski]

Havnt mk3 ecus got immobiliser fitted.

[Valere Oddoux]

That's what it sounds like, it fires up and dies strait away like if using a key without the chip.
Is there a way to get around that?

[lemski]

Try having the other cars key near the barrel so it picks up the chip.
I cant rember how they work but a mate use to have a key taped to a imob ring in his fusebox on his mk2

[itavaltalainen]

Other car keys won't help you there.
You can use the keys that fit car, you only need to match immo and engine ecu (no login required for that)

[Valere Oddoux]

Swapped the ecu's to their proper car and they start again. Problem still there with the blue one. 

[itavaltalainen]

Swap ECUs and marry it to cars immobiliser (no PIN required and you can marry it to other car again afterwards with no issues).

More here (despite what it says I never needed PIN):
http://wiki.ross-tech.com/wiki/index.php/Immobilizer_I_ECU_Swapping

[Valere Oddoux]

Thanks,
Interesting, but I don't have the program to do that.