2007 2.0T slow acceliration problem

[LordKalabic]

So my car is a 2007 Audi a4 2.0T Unitronic stage 1+ with 123,000 miles got the ecu flashed to stage 1 plus about 3,000 miles ago, feels like it runs fine but only when it's cold in the mornings, but as soon as it gets warm the acceliration im any gear is veryyyy sloww, torbo seems to be working but limped. I changed the pcv valave, got an oil change and also had the down pipe replaced BC It had a leak, then I took it to a shop to get it lowered on coilovers, after that my car wouldn't start, I replaced the started then it started again, then again my car wouldn't start and I had the battery replaced, it runs now but the problem of slow acceliration is still there. When I max out the engines rmp's it backfires and the check engine light flashes and sometimes stays on. I Got the code scanned and it was a misfire on the third cylinder, today I replaced the coil packs but the problem didn't go away. Did anybody else experience this problem. It could be the diverter valve since I haven't replaced mine and its recommended after the tune. But how can I forsure know..since its running good when the engine is cold..please help..!

[Andrew149]

Did you replace the spark plugs?

[RandyQUATTRO]

^^ agree, check your plugs. I had similar symptoms with car being fine when cold but when warmed, slooow. Finally threw a P0299, had N75 valve replaced and acceleration was regained. N75 was replaced only after new plugs, newer Rev D DV, new coil packs, and new thermostat/sensor.


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[dalmation53]

OP you replaced everything except what really needed to be done. I'm selling 4 coilpacks for $80 shipped OEM.

[LordKalabic]

Replaced spark plugs no check engine light anymore but the slow acceliration is still there. Next is N75 valve and DV+?


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[dalmation53]

Replaced spark plugs no check engine light anymore but the slow acceliration is still there. Next is N75 valve and DV+?


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Buy my coilpacks and have a racekor..

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[LordKalabic]

Fixed problem two days ago, no sign of reappearance. Changed the n75 valve, there was a hole in the gray nipple looking area on the valve itself. Also I had a coolant leak on the coolant flange which I had replaced as well.


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