Since installing ported TB on my C5
Thread Starter
Burning Brakes
Joined: Jan 2008
Posts: 1,005
Likes: 1
From: springfield MO
Since installing ported TB on my C5
It has been popping a lot more on decel. Like 2-3x more than normal.
Is this a sign of the ported TB making the car run rich or lean? I've been trying to drive it as lil as possible and take my truck until I can get a re-tune on Nov 5th but Im just curious when adding a ported TB if they make them run rich or lean until a retune
Is this a sign of the ported TB making the car run rich or lean? I've been trying to drive it as lil as possible and take my truck until I can get a re-tune on Nov 5th but Im just curious when adding a ported TB if they make them run rich or lean until a retune
Tech Contributor
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From: Should this thoughtful, valuable contribution meet with no acknowledgement or 'thanks' this post----
well. if it now allows more air in to mix with a fixed amount of fuel it would be lean, correct?
Thread Starter
Burning Brakes
Joined: Jan 2008
Posts: 1,005
Likes: 1
From: springfield MO
Tech Contributor
Joined: Dec 1999
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Actually,, if you just ported the TB and nothing else,, it shouldn't change that much to effect the tune. Are you sure that its properly sealed on the manifold and nothing was done to the throttle blade like a hole was drilled in it??
Squirt some brake parts cleaner around the TB/Manifold joint and vacuum lines and see if it changes the idle. If it does,, you have a LEAK!
BC
Squirt some brake parts cleaner around the TB/Manifold joint and vacuum lines and see if it changes the idle. If it does,, you have a LEAK!
BC
Thread Starter
Burning Brakes
Joined: Jan 2008
Posts: 1,005
Likes: 1
From: springfield MO
Actually,, if you just ported the TB and nothing else,, it shouldn't change that much to effect the tune. Are you sure that its properly sealed on the manifold and nothing was done to the throttle blade like a hole was drilled in it??
Squirt some brake parts cleaner around the TB/Manifold joint and vacuum lines and see if it changes the idle. If it does,, you have a LEAK!
BC
Squirt some brake parts cleaner around the TB/Manifold joint and vacuum lines and see if it changes the idle. If it does,, you have a LEAK!
BC
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
If you have a scanner that reads live sensor data or have access to EFI Live or HP Tuners, you can data Log and see what the LTFTs are doing. That will let you know if it is way off the tune. The LTFT value should be very close to ZERO or very slightly negative.
BC
BC
