Insurance quotes through Adrian Flux
Audifans.net: Audi Forums

www.audifans.net :: View topic - Lumpy Idle on Audi 80
 
 Forum FAQForum FAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
View next topic
View previous topic
Post new topic   Reply to topic
Author Message
FatAudi80
Needs to get out more



Joined: Feb 03, 2003
Posts: 165
Location: Oxon

PostPosted: Wed May 14, 2003 6:38 am Reply with quote Back to top

My Audi has recently been idling badly and starting badly. 1991 AAD 2.0 8v. I have just read the posts regarding Lambda probes and definitely need to do that job as i know mine has not been looked at for AT LEAST 140,000 miles!
Will replaceing this cure the lumpy idle and poor starting? (When you start the car from cold it will run but as soon as you give it any throttle is pops and stutters and even stalls. This goes away completely when warm - still lumpy idle though.)

P.S. Fuel consumption is approx 30mpg, all motorway miles

Any random thoughts welcome.

Cheers,

Steve.
 
View user's profile Send private message
Mikes2
Site Moderator
Site Moderator



Joined: Jan 31, 2003
Posts: 9143
Location: Polmont

PostPosted: Wed May 14, 2003 11:14 pm Reply with quote Back to top

Unlikely a lambda probe will help cold running - until the probe has been warmed up, the ecu ignores it. Common symptoms are heavy fuel consumption and or poor acceleration once warm

I would suggest either a vacuum leak or possibly fuel injector problems. Most common is the crankcase breather hoses leaking. For injectors it will be either seals or the injectors themselves leaking.

_________________
Mike

________________
http://www.s2-audi.co.uk 
View user's profile Send private message Visit poster's website MSN Messenger
Tino
Inexperienced



Joined: Jun 27, 2003
Posts: 33
Location: UK

PostPosted: Fri Jun 27, 2003 4:37 pm Reply with quote Back to top

Confused
I had this problem on my 80`89 1.8s. turned out to be the carburrator flange had a hairline split in it.
You can check this by starting up, allowing the engine to idle and pushing the air-pan, gently but firmly from side-to-side and up and down. The engine will begin to stall or you may hear a sucking sound if this is your problem.

The part is cheap and easy to replace.
 
View user's profile Send private message
Locomotion
UltraUser



Joined: Jan 21, 2003
Posts: 4230

PostPosted: Fri Jun 27, 2003 4:46 pm Reply with quote Back to top

Alternatively on fuel injected cars spray WD40 around the inlet manifold/plenum chamber and watch the exhaust for smoking, this will confirm an air leak. Fuel injector cleaner may help provided the injector seals are ok. Evil or Very Mad
 
View user's profile Send private message
Display posts from previous:       
Post new topic   Reply to topic

View next topic
View previous topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum


Forums ©