Post Reply 
 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Mystery 2000 Mercury Villager aka Nissan Quest, 3.something V6, 90k miles, central NY
03-12-2013, 09:11 PM
Post: #1
Mystery 2000 Mercury Villager aka Nissan Quest, 3.something V6, 90k miles, central NY
Currently starts normal and runs for about 3 or 4 seconds then dies. Will start right back up and run and do the same thing as many tries as you want.

Replaced inline fuel filter with a "T" hooked to fuel pressure guage which reads around 50 at key on then drops to 40 when pump kicks off. Starts and pressure builds to 50 for those 3 or 4 seconds, then builds to 55 or so when it dies.

Its currently on ramps in the garage, post op for motor mounts front and rear that are attached to a bolt on frame support running front to rear under the engine. During the procedure, the O2 sensor hooked to the cable that was hooked to that support was compromised slightly, bending the collar of the O2 sensor down slightly. There might have been a crunch, but it bent back straight.I tried unplugging the sensor to see if it would run, no difference and no new codes.

Before this whole procedure, the van was fine but making a loud clunk over bumpy roads that indicated either something with the struts or bad motor mounts. Engine ran fine with no issues but did have a P0110 here and there when it went in. Question is, new O2 sensor, new intake air temp sensor, or did something get messed up when the motor leaned against the firewall during the motor mount deal (need a better jack)? There was no real struggle or freakouts during that part of it and I am absolutely baffled as to why it will starts and run sounding just fine for 3 or 4 seconds and then just quit. You can kinda keep it running a little longer by feathering the throttle, but not much.

Any input is greatly appreciated!
Find all posts by this user
Quote this message in a reply
03-12-2013, 11:13 PM
Post: #2
2000 Mercury Villager aka Nissan Quest, 3.something V6, 90k miles, central NY
PO110 is the air intake temp sensor and as long as you replaced it and got the plug back on tight that should be good to go. Same with that damaged O2 sensor, although generally that will not cause a no-start situation even if it's bad.

The hard part from where I am sitting is not being able to put my eagle eye on what else might have been pulled taught or pinched during the mount replacement. From past experience you can't rule out even the simple things, like a ground wire or vac line that has been displaced. The fact that you have good fuel pressure at least tells me you have gas in the tank so we are probably looking at the spark going away (wiring?) or the mixture being out in left field. (vac line?)

Now, take a deep breath and start with easy stuff. Check ALL of the fuses (with a test light) to make sure nothing blew when the motor fell back. After that go over the vac lines and follow the wiring harness looking for pulled plugs or broken grounds. You will be looking for both any place where things could have pulled tight or gotten pinched. You might also try the "jiggle test" to see if wiggling things changes anything while someone else cranks it over.

Let us know what you find and we can post more.
Find all posts by this user
Quote this message in a reply
03-13-2013, 10:25 PM
Post: #3
2000 Mercury Villager aka Nissan Quest
I would like to add one extra suggestion to Rupe’s list of “Basics.” Start it & try giving it a little bit of starting fluid before it dies. If you can keep it running on starting fluid you know that something is preventing it from getting fuel. That might help you narrow down the search.

Thanks for using the forum,
Garner

Interested in Mining? Look here: Coal Mining, PA
Visit this user's website Find all posts by this user
Quote this message in a reply
03-17-2013, 10:32 AM
Post: #4
RE: 2000 Mercury Villager aka Nissan Quest
So I checked all the fuses and nothing was blown. The more I tried to keep it running the longer it would stay running until the eureka moment I looked under it and saw the exhaust pipe in front of the catalytic converter orange hot. Apparently the banging around with the motor mounts dislodged debris and plugged it.

Thanks for the advice and I hope this helps someone else down the road Smile
Find all posts by this user
Quote this message in a reply
03-17-2013, 11:02 AM
Post: #5
2000 Mercury Villager aka Nissan Quest, 3.something V6, 90k miles, central NY
Good eye to catch that while scratching your head in frustration! After 40 years of doing this I can't say I have ever seen a cat go bad in the shop. I'm glad you shared the solution with us.
Find all posts by this user
Quote this message in a reply
Post Reply 


Forum Jump:


User(s) browsing this thread: 1 Guest(s)