I recently purchased a 2003 Jetta ALH and everything was fine till yesterday. I was on my way to work and this thing started idling like crap. It felt like a gas engine with a misfire. But when you get off idle it felt fine. Plus no CEL which confused the hell out of me. So I did some research when I could during the day and still was confused.
Fast forward to leaving for the day. I leave work, turn on the ramp for highway and just flogged the crap out of this thing. Pulling really well, 25 lbs of boost according to the boost gauge, get to about 105 and decide to let off so I don't get a speeding ticket. Everything is fine until about 8-9 miles from home and boost coming on very slow and not as much as when I got on the highway earlier. A couple more miles down the road, no boost at all. Almost feels like limp mode.
About 2 miles from home the CEL light finally comes on.
I plug the flashzilla into the diag port to get codes. They are:
16502
16686
17964
The 16502 sounds like a coolant temp sensor. Not a big deal.
16686 confuses me as it says cyl # 2 misfire. These things only have compression and fuel. I am hoping this is simple and not a compression issue.
The 17964 could be a few different things from what I have researched. When I got home, I looked around the engine for something that might be unplugged or obvious but did not find anything.
I did not have a lot of time to look over the car as we had things to do last night. I am going to have more time this weekend to check all of the intake hoses and vacuum lines. If I do not find anything there, I will check the actuator and turbo for failure. I suspect maybe the actuator might be sticking or the N75 might have failed but I do not have a hand pump or anything to check these with vacuum.
Sorry for the lengthy post. Any advise would be great and appreciated. Thank you.
Fast forward to leaving for the day. I leave work, turn on the ramp for highway and just flogged the crap out of this thing. Pulling really well, 25 lbs of boost according to the boost gauge, get to about 105 and decide to let off so I don't get a speeding ticket. Everything is fine until about 8-9 miles from home and boost coming on very slow and not as much as when I got on the highway earlier. A couple more miles down the road, no boost at all. Almost feels like limp mode.
About 2 miles from home the CEL light finally comes on.
I plug the flashzilla into the diag port to get codes. They are:
16502
16686
17964
The 16502 sounds like a coolant temp sensor. Not a big deal.
16686 confuses me as it says cyl # 2 misfire. These things only have compression and fuel. I am hoping this is simple and not a compression issue.
The 17964 could be a few different things from what I have researched. When I got home, I looked around the engine for something that might be unplugged or obvious but did not find anything.
I did not have a lot of time to look over the car as we had things to do last night. I am going to have more time this weekend to check all of the intake hoses and vacuum lines. If I do not find anything there, I will check the actuator and turbo for failure. I suspect maybe the actuator might be sticking or the N75 might have failed but I do not have a hand pump or anything to check these with vacuum.
Sorry for the lengthy post. Any advise would be great and appreciated. Thank you.