Audi A4 B6 2.0 Negative Fueltrim Lpg, Positive fueltrim Gasoline
09-25-2023, 10:38 AM
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Audi A4 B6 2.0 Negative Fueltrim Lpg, Positive fueltrim Gasoline
Hello, My name is Rene, im from the Netherlands.
My Audi A4 has a strange problem. I do have some experiance finding problems but I cant seem to solve this one.
When I monitor the fueltrim while using gasoline it will be around +10, however when im using Lpg it will drop to -25 instantly.
Globaly the car runs just fine, especialy when the ECU has had time to adept. Cold start can be a problem sometimes. It wil not run well en stall. after a few tries, especialy with high revs it will pull itself thru.but apart from that you would not know there is a problem if you did not see the values. the O2 Voltage never settles at 0,5V but keeps going up and down. the Lambda value is around 1 to 1.2.It does not safe a faultcode.
My first thought was a gasoline injector thats stuck half open, i removed, checked and flushed them all, im sure they work just fine so that was not the problem. I realy dont see what else can cause this problem.
My fueltrim used to be around 0 with both fuelsystems.
Hopefully somebody can point me in the right direction, so i can keep my B6 on the road for a while.
With kind regards,
René
[img]data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAQAAAA ngNWGAAABDUlEQVR4AYXRgUZDYRjH4TegFTKgpEqiFJgoWAoME QGBgBboChaaAKxLKAhAhQqAdAmpBIQolkCFqp2nITvNKXuA7+/Hhzey5OWjE4Nq3rzY1f9/NGHPB549492+8Ww060iCS2XdctZdI3GsECmb+HJoIX6x6EgDm+ lURTH+YB7V9nAqE5WNme4YKuOiY6iMe6PaQxUUIuTbswgFVNJw A8sO3Bn6yR6bWZMSNtJwDtuWfHpQxaPx9C9zadil7jrCigbq6U XceNIVKTWUIqypm2ytJdTiNyNeXclF6GttOVfeDEc7qzjR23r3 OMFqZKng1kw0mXGLrfibHTScOZWgGv9TdC6ROFeMTgwYiIxvJz MRWQbeGZUAAAAASUVORK5CYII=[/img]
.
My Audi A4 has a strange problem. I do have some experiance finding problems but I cant seem to solve this one.
When I monitor the fueltrim while using gasoline it will be around +10, however when im using Lpg it will drop to -25 instantly.
Globaly the car runs just fine, especialy when the ECU has had time to adept. Cold start can be a problem sometimes. It wil not run well en stall. after a few tries, especialy with high revs it will pull itself thru.but apart from that you would not know there is a problem if you did not see the values. the O2 Voltage never settles at 0,5V but keeps going up and down. the Lambda value is around 1 to 1.2.It does not safe a faultcode.
My first thought was a gasoline injector thats stuck half open, i removed, checked and flushed them all, im sure they work just fine so that was not the problem. I realy dont see what else can cause this problem.
My fueltrim used to be around 0 with both fuelsystems.
Hopefully somebody can point me in the right direction, so i can keep my B6 on the road for a while.
With kind regards,
René
[img]data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAQAAAA ngNWGAAABDUlEQVR4AYXRgUZDYRjH4TegFTKgpEqiFJgoWAoME QGBgBboChaaAKxLKAhAhQqAdAmpBIQolkCFqp2nITvNKXuA7+/Hhzey5OWjE4Nq3rzY1f9/NGHPB549492+8Ww060iCS2XdctZdI3GsECmb+HJoIX6x6EgDm+ lURTH+YB7V9nAqE5WNme4YKuOiY6iMe6PaQxUUIuTbswgFVNJw A8sO3Bn6yR6bWZMSNtJwDtuWfHpQxaPx9C9zadil7jrCigbq6U XceNIVKTWUIqypm2ytJdTiNyNeXclF6GttOVfeDEc7qzjR23r3 OMFqZKng1kw0mXGLrfibHTScOZWgGv9TdC6ROFeMTgwYiIxvJz MRWQbeGZUAAAAASUVORK5CYII=[/img]
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