Quote:
Originally Posted by Ashhong
Hi all, I've posted in a few threads trying to find some answers but I'm at my wits end and need some help. Below are the steps of what has happened so far
1. Replaced valve cover gasket
2. Replaced oil filter housing gasket
3. Slightly cracked the head of the charge pipe while doing 2, ignored it
4. Tested the car by idling only. Engine shakes a little when first booting it, and then over time the RPMs just keep dropping. At around 500-550, engine misfires and revs up the RPMs to about 1k, and then everything repeats.
5. Found codes P112F and P0171
6. Bought and installed a VRSF charge pipe thinking that could be the problem.
7. Same shaking issue, same codes
8. Did a smoke test and could not find a leak (what point is the best to test the smoke from?)
I think that's everything. Does anybody have any idea what it could be? The car drives fine for the most part, but just can't idle. I've found the descriptions for those codes but I just can't pinpoint what the issue is. Please help!
Correction: the car does not drive that great. When I come to a stop at all abruptly, the RPMs dip to around 500, car shakes, and revs up to 1k  |
P0171 is usually the result of a vacuum leak. After a 2 min search, since I've never seen P112F, that too is a caused by a vacuum leak. I bolded #1, reason being is if you didn't have this issue before and now you do, something may have happened when performing step #1.
Two places I would investigate.
- First one is where the yellow arrow is pointing at. Check that connection and the other end where it connects to. (IF YOU HAVE EWG IT WILL NOT BE PRESENT, ONLY PRESENT ON PWG)
- Check the hose to the right of the arrow which is directly behind the oil fill cap. That crankcase breather hose connects to the inlet of the turbo. This could be broken or damaged, or may not even be fully seated.
