Car slowing intermittently - Audi 80 Cabriolet 2.0e 1996

edwardbear · 09-01-20, 02:25 PM

My cabriolet has developed a strange fault, it slows right down to 2000 rpm and then in some instances has slowed to a stop.

I've replaced 3 vacuum hoses and checked all the other hoses, but its still happening.

I've been advised to check the oil for yellow gunk. But I am well and truly stumped.

john bowden · 09-01-20, 02:59 PM

Fuel starvation? Is the pump still running when it happens ?

John

edwardbear · 09-01-20, 03:02 PM

Good question. I'll have to check. It would be weird for it to happen intermittently no?

BackintheFold · 09-01-20, 03:08 PM

I agree with JB. Sounds like fuel starvation, and the pump/wiring/relay/fuse are good places to start.
If you remove the rear seat, can you hear the pump while inside the car? I have done that on a B2 80 before.

tractor Dave · 09-01-20, 03:42 PM

Has your fuel filter been changed? On my Avant is was the original from 1994!
Its so inaccessible on the Avant, no one had ever changed it.

BackintheFold · 09-01-20, 03:48 PM

on my ur it was from 1988, when there was still a West Germany...
I have new ones now available in my hand. I would advertise in the For Sale section and have upgraded, but its not working yet.

john bowden · 09-01-20, 06:05 PM

Quote:

Originally Posted by tractor Dave

Has your fuel filter been changed? On my Avant is was the original from 1994!
Its so inaccessible on the Avant, no one had ever changed it.

Even being difficult to get at is no excuse.

Over the weekend my patience was severely tested by removing the heater motor on a 2010 fiesta, pollen filter looked like it had never been replaced and had burnt out the motor because it struggled to draw air through. Changing pollen filter took two minutes and 7 quid....

Knowing the importance of good fuel pressure on these I'd be tempted to start there

John

Sandro · 09-01-20, 08:14 PM

Quote:

Originally Posted by john bowden

Even being difficult to get at is no excuse.

Over the weekend my patience was severely tested by removing the heater motor on a 2010 fiesta, pollen filter looked like it had never been replaced and had burnt out the motor because it struggled to draw air through. Changing pollen filter took two minutes and 7 quid....

Knowing the importance of good fuel pressure on these I'd be tempted to start there

John

agree

mikes2 · 10-01-20, 07:30 AM

Relay 30 is a common failure on the 2.0e ABK cars. It’s a relay for the ecu and when it fails it can cause misfires and cutting out

edwardbear · 10-01-20, 11:39 AM

Fuel filter acquired. We shall see how this goes.

10-01-20, 07:30 AM	#9
mikes2 4 ring whore! Classic Audi Club Member Join Date: Nov 2007 Location: Polmont Posts: 2,617	Relay 30 is a common failure on the 2.0e ABK cars. It’s a relay for the ecu and when it fails it can cause misfires and cutting out __________________ 1991 90 quattro 20v sport 1991 90 quattro

09-01-20, 02:59 PM	#2
john bowden Grown up member Classic Audi Club Member Join Date: May 2010 Posts: 156	Fuel starvation? Is the pump still running when it happens ? John

09-01-20, 03:02 PM	#3
edwardbear Grown up member Join Date: Jan 2017 Posts: 48	Good question. I'll have to check. It would be weird for it to happen intermittently no?

09-01-20, 03:08 PM	#4
BackintheFold Senior Member Classic Audi Club Member Join Date: Feb 2019 Location: Near an MB ur Quattro Posts: 1,171	I agree with JB. Sounds like fuel starvation, and the pump/wiring/relay/fuse are good places to start. If you remove the rear seat, can you hear the pump while inside the car? I have done that on a B2 80 before.

09-01-20, 03:42 PM	#5
tractor Dave Senior Member Classic Audi Club Member Join Date: Apr 2018 Location: Wales Posts: 1,157	Has your fuel filter been changed? On my Avant is was the original from 1994! Its so inaccessible on the Avant, no one had ever changed it.

09-01-20, 03:48 PM	#6
BackintheFold Senior Member Classic Audi Club Member Join Date: Feb 2019 Location: Near an MB ur Quattro Posts: 1,171	on my ur it was from 1988, when there was still a West Germany... I have new ones now available in my hand. I would advertise in the For Sale section and have upgraded, but its not working yet.

10-01-20, 11:39 AM	#10
edwardbear Grown up member Join Date: Jan 2017 Posts: 48	Fuel filter acquired. We shall see how this goes.