MarVelo
New Member
- Joined
- August 17, 2009
- Messages
- 6
- Reaction score
- 0
- City, State
- Wyandotte, Michigan
- Year, Model & Trim Level
- 2000 XLS 4.0L
Hello Forum! I'm a long time lurker and this is my first legitimate post.
I have a 2000 4DR, 4WD, V6 OHV Explorer. I purchased it second hand with 130k miles on it a year ago and have since run it up to 142k.
I noticed awhile back that there was an errant red vacuum line capped with electrical tape and taped off to the oil spout breather tube. No clue where its meant to go. I hope somebody can give me a clue. It looks like it runs from the drivers side connected to the intake manifold, goes under/behind the intake and along the fuel rail. There it splits and one line connects the the fuel line and the other is the mystery hose. Below are a few pictures to illustrate the situation.
In addition to this mystery, I have another problem. I recently replaced my intake manifold upper and lower gaskets and the drivers side valve cover gasket (passenger side was too much work and it was midnight by time I finished the rest). I did this because I was getting a P0174 and P0171, both banks too lean.
When I put it all back together now I have a rough idle where I didn't really before and now I'm only getting P0174.
It may be interesting to note that the idle is only rough while in gear. Park or neutral the idle is fine. When up to speed and reving over 1.5k RPM it also seems fine (though it may be masked by the speed).
So far I have:
-Cleaned the AIC
-Put a new gasket on the EGR Valve/Intake junction
-Checked plugs and wires
-Checked the PCV and hose, both were fine
I'm running out of ideas. Could it be the fact that I only replaced one valve cover? that doesn't make sense to me why I would start idling rough where I had not before. It seems like a vacuum leak which is partly why I bring up the first issue with the mystery vacuum line. Please help, this is driving me nuts.
-Tom
I have a 2000 4DR, 4WD, V6 OHV Explorer. I purchased it second hand with 130k miles on it a year ago and have since run it up to 142k.
I noticed awhile back that there was an errant red vacuum line capped with electrical tape and taped off to the oil spout breather tube. No clue where its meant to go. I hope somebody can give me a clue. It looks like it runs from the drivers side connected to the intake manifold, goes under/behind the intake and along the fuel rail. There it splits and one line connects the the fuel line and the other is the mystery hose. Below are a few pictures to illustrate the situation.
In addition to this mystery, I have another problem. I recently replaced my intake manifold upper and lower gaskets and the drivers side valve cover gasket (passenger side was too much work and it was midnight by time I finished the rest). I did this because I was getting a P0174 and P0171, both banks too lean.
When I put it all back together now I have a rough idle where I didn't really before and now I'm only getting P0174.
It may be interesting to note that the idle is only rough while in gear. Park or neutral the idle is fine. When up to speed and reving over 1.5k RPM it also seems fine (though it may be masked by the speed).
So far I have:
-Cleaned the AIC
-Put a new gasket on the EGR Valve/Intake junction
-Checked plugs and wires
-Checked the PCV and hose, both were fine
I'm running out of ideas. Could it be the fact that I only replaced one valve cover? that doesn't make sense to me why I would start idling rough where I had not before. It seems like a vacuum leak which is partly why I bring up the first issue with the mystery vacuum line. Please help, this is driving me nuts.
-Tom