audi s2 aby...

[mathias]

Ive got some issuse with my s2, and i'm out of ideas now and is starting to think about aftermarket engine management. the car dies on idle and cuts while driving its like you turn the ignition on and off and it always start without any problems. ive got no fault codes in vagcom. It get worse when the car gets up to temprature

I have tested 2 diffrent boxes 3 diffrent chips, changed the mfts, knock sensors crankshaft positioners, pressurised the system. changed spark plugs, the throttle positioner. the air flow meter. new 115r coils

Any body got any idea ?

[newsh]

Maybe?

http://www.s2forum.com/forum/showthread.php?t=24544

[mathias]

Maybe?

http://www.s2forum.com/forum/showthread.php?t=24544

Alredy been tested the boost is around 20 psi, so thats not the problem

[Jamo]

You've changed alot but have you changed the ISV?

[mathias]

You've changed alot but have you changed the ISV?

ISV?

[Jamo]

Idle stabilization Valve, not an S2 diagram but you get the idea

http://forums.quattroworld.com/s4s6/msgs/21853.phtml

[mathias]

Idle stabilization Valve, not an S2 diagram but you get the idea



http://forums.quattroworld.com/s4s6/msgs/21853.phtml

no, but that cant make the car die cut while driving ?

[newsh]

ignition switch?

[johne]

ignition switch?

and or immobiliser interface?

John

[Pat D]

I second the ignition switch. In one that's worn out, the contacts inside get hotter as you drive and then fail until you give the switch a jiggle or thump. This has been happening on B4 lately, and I when I bought the S2 I had to drive 1400km back home in a hotwired fashion because of the same prob.
Bridge your connector at the back of the ignition switch (hotwire it) and see if the prob goes away.

[mathias]

ignition switch?

ok, gonna check it out

and or immobiliser interface?
dont think i have immobiliser

John

I second the ignition switch. In one that's worn out, the contacts inside get hotter as you drive and then fail until you give the switch a jiggle or thump. This has been happening on B4 lately, and I when I bought the S2 I had to drive 1400km back home in a hotwired fashion because of the same prob.
Bridge your connector at the back of the ignition switch (hotwire it) and see if the prob goes away.

Gonna try that, any ideas are good becuse im stuck

[mathias]

Hotwire the car didnt help it died after 2min, and before that it died for like 0.5 sec à couple of times :S

[UrS4boy]

Ive got some issuse with my s2, and i'm out of ideas now and is starting to think about aftermarket engine management. the car dies on idle and cuts while driving its like you turn the ignition on and off and it always start without any problems. ive got no fault codes in vagcom. It get worse when the car gets up to temperature I have tested 2 diffrent boxes 3 diffrent chips, changed the mfts, knock sensors crankshaft positioners, pressurised the system. changed spark plugs, the throttle positioner. the air flow meter. new 115r coils. Any body got any idea ?

Why would you consider going to an aftermarket engine management system when your testing with different ECUs has not improved the situation? Your problem is not related to the ECU, OE or not.

1. Change the electrical portion of the ignition switch. It is probably going to fail soon if it hasn't already. By changing it, you eliminate it as a usual suspect.

2. Find the ECU and Coil fuses (above the ECU). If they are thermal fuses, replace them with normal spade fuses. The thermal fuses can heat up, open up and stay open for a long time (or for forever)

http://forums.quattroworld.com/s4s6/msgs/137287.phtml

3. Check and clean your MAF connection:

http://forums.quattroworld.com/s4s6/msgs/20442.phtml

4. Examine the G40 Cam Position (Hall) Sender connection under the injector cover at the front of the engine. If the connection is good, it still could be the G40 cam sensor. They go flakey and will give intermittent failures:

http://forums.quattroworld.com/s4s6/msgs/139944.phtml

General G40 info: http://forums.quattroworld.com/s4s6/msgs/22580.phtml

5. It might be your fuel pump. At least check the wiring.

http://forums.quattroworld.com/s4s6/msgs/22623.phtml

[mathias]

Why would you consider going to an aftermarket engine management system when your testing with different ECUs has not improved the situation? Your problem is not related to the ECU, OE or not.

1. Change the electrical portion of the ignition switch. It is probably going to fail soon if it hasn't already. By changing it, you eliminate it as a usual suspect.

2. Find the ECU and Coil fuses (above the ECU). If they are thermal fuses, replace them with normal spade fuses. The thermal fuses can heat up, open up and stay open for a long time (or for forever)

http://forums.quattroworld.com/s4s6/msgs/137287.phtml

3. Check and clean your MAF connection:

http://forums.quattroworld.com/s4s6/msgs/20442.phtml

4. Examine the G40 Cam Position (Hall) Sender connection under the injector cover at the front of the engine. If the connection is good, it still could be the G40 cam sensor. They go flakey and will give intermittent failures:

http://forums.quattroworld.com/s4s6/msgs/139944.phtml

General G40 info: http://forums.quattroworld.com/s4s6/msgs/22580.phtml

5. It might be your fuel pump. At least check the wiring.
http://forums.quattroworld.com/s4s6/msgs/22623.phtml

Cant find them :/ are just wentpipes over the ECU

[BIGGYIN]

Fuel pump,relay?