Originally Posted by d2audia8guy
I think the timing belt being worn out may be causing problems with the compression... Am I incorrectly understanding this?
Sorry, but completely incorrect there...nothing to do with compression, unless the belt jumped time, which would cause misfiring all the time and timing codes.
Have run a VagCom on it? ...NOT just a simple code reader (only reads codes associated with
You are describing a likely loss of residual fuel pressure after shutting off the engine...all it takes is one tiny leak from an injector, not closing completely...you'd never see it or smell it. If it was not doing this before changing the fuel filter (almost NEVER a needed change...waste of time, money and exposing an otherwise clean system), you may have introduced just enough dirt on the clean side of the filter to cause this...doesn't take much.
I'd start by putting a bottle of Techron (PROVEN: NOT ANY OTHER BRAND...USELESS) in 1/4 to 1/2 tank of gas...Then do it again on the next 1/4 to 1/2 tank. Many posted reports of this doing the trick...if it can be cleaned, this is the ONLY stuff that actually works.
If that doesn't work, you'll need to go deeper...pull injectors, test pressure regulator, check fuel pressure and pressure bleed-down, etc...