A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

Terrible Sluggish acceleration

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Old 02-23-2017, 09:58 AM
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Originally Posted by clancy
If your fuel trim indicates a too lean condition then have you checked for air leaks in the intake system? Turbo engines are very sensitive to air leaks. This would be after the MAF. Look for broken or cracked air lines. Or listen for air leaks. Can be quite difficult to find. On an old car this is very common.

Search this forum for finding air intake leaks.
I checked and couldn't find any leaks. That is how I found the cat gasket leaking. I also found a hose disconnected from the secondary air pumo to the intake, which I'm assuming is the p0441 code. I'm waiting for the hose in the mail but I'm pretty sure that can't be the problem. I assume it's got to be a disconnected line to make it run this slow and have 0 boost.
Old 02-23-2017, 10:00 AM
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Ive been reading up on it non stop and it seems it could be a fuel issue too. Like an injector. I'm wondering if an old fuel filter could get this dirty and cause it? Im thinking a clogged filter wouldn't cause THIS much power loss though, pedal to the floor and all.
Old 02-23-2017, 10:10 AM
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I've heard both sides regarding the fuel filter. If you do not know when it was last changed I would do it. Also, has the fuel pump ever been replaced?
Old 02-24-2017, 11:13 AM
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Originally Posted by clancy
I've heard both sides regarding the fuel filter. If you do not know when it was last changed I would do it. Also, has the fuel pump ever been replaced?
I believe the fuel pump was replaced but I'm not 100% sure. Would testing fuel pressure at the rail determine if its a fuel issue or not?
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