Talked with the service manager last night and now he believes my problem is NOT a MAF sensor but the fuel system delivery valve. Seems several owners of 03 TT's and C4S' have reported a problem with "surges". It appears the snap connectors are coming loose under certain conditions (gets warm and start to expand causing the clip to let the line drop out of the connector and letting air / fuel vapor get sucked into the line). This is what is causing the surges in the 3-3.5k rpms range. Then the line / connector "reconnects" and causes the problem to disappear for a short time. A new TT owner was in there last night getting his assembly replaced. Mine is now on order. Symptoms can be unusual starting problems (long crank) or temporary surges in power. Have to wait a week for parts before mine can be replaced and totally checked out but this is what the guys at the dealership believe to be the problem. Hope this helps.
Discussion summary
YOUR RESEARCHATTN: 03 C4S and TT Owners
1 matching discussions were examined; no attributable action/outcome evidence was detected. No consensus or repair conclusion is claimed.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Read captured repliesInsufficient extracted evidence does not mean there is no answer in the original discussions.
1 matching discussions · 1 captured posts examined · 0 partial discussions
Coverage and how to read this overview
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
1 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
- Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T120458Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
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