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

chip cel help

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Old Feb 6, 2006 | 10:01 PM
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Default chip cel help

i just got an apr chip installed today in my 99.5 1.8t , i was loving it for about 25 miles when the cel started flashing and then became steady, and the car started bogging when the throttle was open. i went back to the apr dealer and they told me id blown a coilpack on the 4th cylinder which they'd replaced at my expense. afterwards i drive about 30 feet down the road and the same thing happens again. i come back and they replace a spark plug and put the old coilpack back on, refunding my money. everything is fine after this until about 50 miles and the same problem returns. i dont know the codes that came up on vag-com but ill get them tomorrow if theres still a problem after i replace all the spark plugs to ngk's, but any help would be greatly appreciated, because so far its cost me about $550 to screw up my car
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Old Feb 6, 2006 | 10:41 PM
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Sounds like it REALLY doesn't like that chip.
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Old Feb 7, 2006 | 12:09 AM
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yep, changing spark plugs is first on the list. do that then post back.
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Old Feb 7, 2006 | 07:29 PM
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changed all the plugs today and the oil + filter, brought it to a friends shop vagcom codes were:

16684
16685
16685
16685

had him erase the fault codes and it was running great for most of the day, then the same thing happened once again (poor acel, bogging, and CEL). checked the spark plugs and they were very lean. it only seems to bog when the throttle is wide open and the car has been warmed up
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