Gremlins have made it down under -

[Grif]

Could be a vacuum leak around the intake manifold. Using a stethoscope, a piece of garden hose or some such listening device might help you locate a leak if you poke around with it a bit when the engine is running. Another quick test would be to spray carb cleaner or starting fluid (ether) around the base of the intake manifold while the engine is running at any stable idle. An increase in RPMs would tell you that the spray is near the leak.

[WormGod]

Dunno, I would hold something other than a vacuum leak suspect. Start with the EGR since the CEL leads you there. You start tearing down too much too soon, you might actually create a vac leak related to 171/174. Baby steps.

[nfpgasmask]

Start with the EGR since the CEL leads you there.

x2. EGR problems with the VX are VERY common. I had the exact same set of symptoms and the same code. I replaced the EGR (very easy swap) and I have been problem free since.

Bart

[tom4bren]

Dude - sorry to hear about your gremlin infestation. I'm sure you'll get a handle on it pretty quick. Best of luck.

[Scott Larson]

Dunno, I would hold something other than a vacuum leak suspect. Start with the EGR since the CEL leads you there. You start tearing down too much too soon, you might actually create a vac leak related to 171/174. Baby steps.

Definitely a possibility. I missed that his CEL had lit, a code would indicate it had. Good catch!

[WILLY]

Time for new intake gaskets.

[circmand]

Could be a vacuum leak around the intake manifold. Using a stethoscope, a piece of garden hose or some such listening device might help you locate a leak if you poke around with it a bit when the engine is running. Another quick test would be to spray carb cleaner or starting fluid (ether) around the base of the intake manifold while the engine is running at any stable idle. An increase in RPMs would tell you that the spray is near the leak.

I would also say vacuum leak. Note if using a hose to hear the leak remember to empty the water out of it first