Had this little Audi TT come in the other day with a running issue (bad stumble) and a misfire check engine light. The owner had diagnosed the misfire and put in a couple new coil packs with spark plugs, but there was no change. A lot of times these Audi’s can have issues with low voltage, so I put the charger on the battery to see if anything changed, but the battery was in good shape. I did find a …

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Had a freind bring by his 996TT that was having some odd boost and running issues. Erratic boost now and again, and then the CEL came on. CEL was due to the MAF sensor, which I replaced and took out for a test run. A lot of times erratic boost levels are due to bad MAF sensors. Unfortunately, we had two issues here. The other major cause of boost issues are spark plugs. On my test run, the CEL started …

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