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Strange fueling problem...

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Old 12-04-2003, 03:47 PM
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Stu
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Unhappy Strange fueling problem...

Finally got the car to pull with no Knock from a stop thru the gears....or so I thought.

I am gettin no knock anywhere except the top of 3rd gear. From about 5500 RPM on up I am showing anywhere from 2 to 5 degrees of knock Usually 4.

Would this be a sign of a weakening pump or bad plugs? Or is it just a tuning issue? I have my LTrims at - 2 to - 4 all day long.

Last week at the track I was runnin 118 and it would miss a little at about the 1000' mark. Right where 5700 is in 3rd. I know this is a 120 mph car I just got to get rid of the knock.

Pulled the plugs and they read pretty good.


Can anyone recall a similar situation?








Thanks, Stu
Old 12-04-2003, 07:09 PM
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I'm guessing it's an A4.All wot tuning should be 3rd gear for tuning out knock.That is where the most load is.
Sounds like you just need to add fuel in the PE table from 5200rpm and up.
Old 12-04-2003, 08:04 PM
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just put it on a dyno or somethign just so you can get a good spot what the fuelign is doing at those rpm points
Old 12-04-2003, 08:11 PM
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Originally Posted by GrannySShifting
just put it on a dyno or somethign just so you can get a good spot what the fuelign is doing at those rpm points
Jeff, If I could afford the dyno time I woulda called you a long time ago.
Old 12-04-2003, 11:16 PM
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do it yo self! onyl 100 bucks and hour
Old 12-04-2003, 11:17 PM
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the higher the gear the higher the load the higher the EGTs are timign with the maf setups i beleive is a little higher than in the low gears if im not mistaken




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