Where is the ECU on an 1992 Audi 100?

randall977 · 10-17-2006, 08:39 AM

Thought I had found the ECU under the rear passenger seat but turns out it's the ABS ECU - where is the main ECU - passenger footwell like on the 80? How do I know if the ECU is at fault - car starts perfectly and smoothly but dies after about 10 seconds for no apparent reason!

dogskull666 · 10-17-2006, 02:47 PM

i have the same problem. is your car manual or automatic? can you send pics?

randall977 · 10-17-2006, 04:48 PM

I will post a photo but the car is with a garage at the mo to find out why it's not running. It's a manual 2.0 8v (AAD) - I think (having read more of the Haynes manual) the ECU might be behind the carpet on the passenger side in a black plastic sleeve - I can't check though!

Legaumais · 10-18-2006, 12:37 PM

randall977 · 10-18-2006, 01:34 PM

Thankyou for the diagram - found it! The ECU is apparently fine it turns out - the garage who have my car have got it to run perfectly however only upto 2000 rpm! They reckon it needs a new fuel pump (£160!!!!) but they can't be 100% sure that it is the problem?? I've checked for vacuum leaks - can't find any. The pump works but could it be low pressure and still work?

10-17-2006, 08:39 AM	#1 (permalink)
randall977 Newbie Join Date: Oct 2006 Location: Oxfordshire Posts: 5 Gallery: (0)	Where is the ECU on an 1992 Audi 100? Thought I had found the ECU under the rear passenger seat but turns out it's the ABS ECU - where is the main ECU - passenger footwell like on the 80? How do I know if the ECU is at fault - car starts perfectly and smoothly but dies after about 10 seconds for no apparent reason!

10-17-2006, 04:48 PM	#3 (permalink)
randall977 Newbie Join Date: Oct 2006 Location: Oxfordshire Posts: 5 Gallery: (0)	100 2.0E ECU location I will post a photo but the car is with a garage at the mo to find out why it's not running. It's a manual 2.0 8v (AAD) - I think (having read more of the Haynes manual) the ECU might be behind the carpet on the passenger side in a black plastic sleeve - I can't check though!

10-18-2006, 12:37 PM	#4 (permalink)
Legaumais Senior Join Date: Sep 2004 Posts: 188 Gallery: (0)	8 = main ecu Hi, Last edited by Legaumais : 10-18-2006 at 12:43 PM.

10-18-2006, 01:34 PM	#5 (permalink)
randall977 Newbie Join Date: Oct 2006 Location: Oxfordshire Posts: 5 Gallery: (0)	ECU / fuel pump Thankyou for the diagram - found it! The ECU is apparently fine it turns out - the garage who have my car have got it to run perfectly however only upto 2000 rpm! They reckon it needs a new fuel pump (£160!!!!) but they can't be 100% sure that it is the problem?? I've checked for vacuum leaks - can't find any. The pump works but could it be low pressure and still work?

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10-17-2006, 02:47 PM	#2 (permalink)
dogskull666 Newbie Join Date: Jul 2006 Location: American Falls, ID Posts: 8 Gallery: (0)	i have the same problem. is your car manual or automatic? can you send pics?

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