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Found 1 result

  1. If I run the car at less than 1/4 tank full it's very smooth great acceleration and responsiveness. With engine running I went and filled up with 99 octane as usual and straightaway the engine stutter comes back!!!!!!!! Fyi it is NOT fuel quality. I've started a new thread for this but it's an old problem mentioned in previous posts and unresolved. Basically the ctt 06 with 114,000km has been hesitating and stuttering for a while when accelerating particularly under boost in lower gears through the rev range of 2k 3k 4k ish rpm, it also will vibrate and stutter revving the same rpm in neutral/park when stationary. (which is very weird). So after a lot of finding issues which helped the car overall none of them sorted this stutter out. Quick list, New oem Coils, plugs, n75 valve, air filters, purge valve, and Dv's, Fixed a lot of vac and pcv pipes which leaked Smoke tested intake no leaks boost is +0.8 Head Gaskets done a few 1,000 km all new parts gasket Seals etc. (problem was present before and after head Gasket work). I had a suspicion that the lower fuel level was playing a part in this but I can't work out why a fuller tank would cause running issues?
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