AGG Starting problem

[mr cheese]

Hi all,

I wonder if anyone can shed some light on a small problem I have. My AGG engine is in the van, all piped and wired ready to go. It starts first turn of the key and fires for about 2 seconds before dying. Under closer investigation the spark dissapears. What could be causing this to happen?

The obvious culprit would be the ecu I presume. If it is getting a strange signal from one of the sensors would that cause it to kill the engine?

If anyone has any ideas or suggestions of ways forward I would be very grateful.

I have spotted some corrosion on the crank position sensor wires, and we have followed the wiring diagrams from GaryD which have been a great help. I will go through it all again but I fear I need more inspiration.

Thanks, Oliver.

[donciuz]

Sounds like immobiliser problem.

[ELVIS]

have had same on two different AGGs and were same 'issue' but different source of issue.

As has been said above, firing for 2 or 3 seconds is classic immobiliser. Usual vagcom checks, check wiring etc. 5 mins will tell you if it is or not.

Time after that thought it was immobiliser and turned out to be crank position sensor. Tucked right down in a cra9 location behind oil filter. Wiring right at base where it enters sender itself was goosed but covered in oil/grease etc but was quite obviously very poorly!

you installed OBD? vagcom is obvious/easiest place to start.

[mr cheese]

Thanks for the replies. Is the vagcom socket a plug on the loom?

[ewenmaclean]

Hello,

have a look at the posts on the thread below where it's pretty clearly described how to wire up an obd2 socket and where to the get the socket from. I can't be sure of the diagnostic wire colour on yours - I suspect it's the same (grey/white) but Elvis'll set you right there:

http://forum.club8090.co.uk/viewtopic.php?f=12&t=104524" onclick="window.open(this.href);return false;

Ewen

[ELVIS]

Thanks for the replies. Is the vagcom socket a plug on the loom?

its connected to the immobiliser (the black box) not seperately from loom/ecu.

[mr cheese]

Hi all,
Thanks for the advice about the immobiliser. I had missed that but all together in my haste. It took about 10 mins to get it running. After finishing the whole install the next day and doing a 50 mile test drive Inone have 2000 km of AGG power with not a drop of oil burnt, not a drop of water lost and oodles of power (my front wheel nuts did come loose though). The performance has been superb. With a full load, kids, roof, camping equipment etc the van has thumped over countless French mountain passes accelerating in 3rd gear on some quite serious gradients! What a change from my JX days. On the way down I also topped 160kmh during the night in very still air. The consumption has been between 22 and 26 mpg but I runninga GTi K&N air filter and have done a lot of mountain passes etc so I am not unhappy with that. I have not been driving economically either as it is too much fun. I can do all that when I am back on the rat run. Out here in the mountains the T3 has come alive.
I can recommend the feeling to any other prospective converters. Thanks again for all the advice.

[Titus A Duxass]

Glad it's all worked out okay.
Agreed, it's the best thing that I've had done to my old dear.

I saw a GPS 171kmh the last time I ventured on to the Autobahn.