I recently had a timing belt done on my 2003 Jetta Wagon (manual), by the dealer, and I've noticed a couple of things. The did do injection pump timing as well. They said it was out.
First, power is diminished slightly. Second, I'm not getting the economy I once was. I'm calculating 40 hwy as opposed to about 47-48 before the belt. Third, the idle is a little rougher than it once was, just a hair, but I noticed. And, it's overall just not as smooth it seems, especially at 2k RPM.
I took it back in. They checked just the tension and everything's fine they said.
I know these engines are sensitive to timing. So what I'm thinking is that they may have put everything back to spec, in terms of the ECM settings...idle, timing.
Should I maybe pick up a VAG-COM and make some fine tune adjustments? Could I dial in the idle a bit better and advance the timing electronically, just slightly, to see if there are improvements? Other options? Thanks in advance...
First, power is diminished slightly. Second, I'm not getting the economy I once was. I'm calculating 40 hwy as opposed to about 47-48 before the belt. Third, the idle is a little rougher than it once was, just a hair, but I noticed. And, it's overall just not as smooth it seems, especially at 2k RPM.
I took it back in. They checked just the tension and everything's fine they said.
I know these engines are sensitive to timing. So what I'm thinking is that they may have put everything back to spec, in terms of the ECM settings...idle, timing.
Should I maybe pick up a VAG-COM and make some fine tune adjustments? Could I dial in the idle a bit better and advance the timing electronically, just slightly, to see if there are improvements? Other options? Thanks in advance...