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Old 06-05-2007, 02:13 PM   #1
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Default 17544 - Fuel Trim: Bank 1 (Add): System too Lean : Need help


I have that DTC. I had a vaccum leak before. I fix it and it remove other codes. I now only have that one left.

What should I check on my 98 AUDI A4 1.8T Quattro to fix the error?
My symptom is a lack of acceleration. High cost in gas.

Injectors are good, no leak and O2 seams ok.

Someone told me to look at my MAF. How should I test? I clean it with brake cleaner in the past and no change. I have a VAG-COM ver 409.

Thanks and sorry for my mistakes in English.
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Old 06-05-2007, 02:33 PM   #2
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Default Help is here:

<ul><li><a href="http://wiki.ross-tech.com/index.php/Fuel_Trim_Info">http://wiki.ross-tech.com/index.php/Fuel_Trim_Info</a</li></ul>

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Old 06-05-2007, 03:07 PM   #3
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Default Re: Help is here:

Wow! Thanks!
So I guess I still have a vaccum leak with the (add) detail that I have. I hate leak!
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Old 06-15-2007, 08:26 PM   #4
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Default Fuel Trim info "help" page . . Images would be helpfull.

Fuel trim info page talks about 2 fields in block 32.

When I measure that block on my 2.8, I'm seeing 4 fields each with different values.

For me, I've got 3.1%, -3.1%, 2.3% and -5.1% . I get about 150 g/s on my MAF reading before readline.

Sure would be nice to have more detailed examples of possible scenarios for diagnosis.
98 A6 2.8 Quattro
Honolulu, Hawaii
muzzy996 is offline   Reply With Quote
Old 06-15-2007, 08:26 PM
Audi R8

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17544, 18t, 25, a4, add, addfuelbank1, audi, bank, bb, code, fuel, lean, long, system, term, trim

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