running lean
Thread Starter
Melting Slicks
Joined: Jan 2004
Posts: 2,546
Likes: 2
From: Proud dad of 2 responsible adults and 1 fallen warrior txtx
running lean
Kept getting check engine light so took my '04 A4 to the dealer. They found a vacuum leak in the manifold but also found whenever the hood was closed, the engine ran lean. They feel it is the Halltech stinger filter. Even with new manifold gaskets, it still gave them the same problem. Hood open, no problem, hood closed, runs lean.
Anyone have a similar experience or solution?
Anyone have a similar experience or solution?
Team Owner
Joined: May 2003
Posts: 23,480
Likes: 9
From: East Meadow NY
St. Jude Donor '12
Kept getting check engine light so took my '04 A4 to the dealer. They found a vacuum leak in the manifold but also found whenever the hood was closed, the engine ran lean. They feel it is the Halltech stinger filter. Even with new manifold gaskets, it still gave them the same problem. Hood open, no problem, hood closed, runs lean.
Anyone have a similar experience or solution?
Anyone have a similar experience or solution?
otherwise, take it in for a dyno tune and they can adjust the fuel as necessary.
Chris
Race Director
Joined: Jul 2004
Posts: 16,795
Likes: 62
From: Lake Havasu City, AZ
The PCM should be able to handle the increased air flow from the stinger. It is supposed to be able to adjust (re-learn) for up to a 25% increase in airflow...
But if you used it in combination with a high flow air bridge a descreened (or after market high flow) MAF and a ported polished throttle body, you would like be outside the tolerances...
Any other goodies that increase the airflow?
But if you used it in combination with a high flow air bridge a descreened (or after market high flow) MAF and a ported polished throttle body, you would like be outside the tolerances...
Any other goodies that increase the airflow?
Drifting
Joined: Oct 2003
Posts: 1,540
Likes: 0
From: bloomfield nj
is the air bridge loose and sitting too high or the boot going to the throttle housing have a crack? almost sounds like when the hood is closing it is pushing on the air bridge and creating a air leak after the maf.just a thought.
