Engine Start Up/Idle

[joelwc]

Guys - would appreciate your thoughts here.

About two weeks ago, I went to the store in my 2002 Sport Trac (4.0 L). When I came back out the truck started, and then Immediately died. It would not re-start. I reset the fuel pump switch, pulled the fuse for the fuel pump, disconnected the battery, etc and would crank over but wouldn't fire. I went to call a cab, and after letting it set about 25 minutes, it started right back up, and ran fine.

Now I have noticed that when it starts when it is cold it acts like it wants to stall, to the point that I have to hit the gas to keep it running some times. Also very occasionally when I am driving I notice that when I come to a stop sometimes the idle dips but it has never cut out.

I have been reading about cleaning the Idle Air Control to fix those symptoms, which I did and there was no improvement.

I am wondering what my next steps should be. Should I replace the IAC valve? I dont want to spend the cash if it may be something else. Any other things to check?

Its been a great vehicle, about 130K on the odometer, and no real troubles.

Any thoughts would be really appreciated.

Joel

 

[Alwayssideways]

I am not sure if there is a how to up here, but I would try and find a way to test the iac. I wonder if it functioning correctly or getting stuck or something. I also might want to check the vac hoses. Cleaning the maf might not hurt either

 

[swshawaii]

One of the first things to check on a Job 2 ST. Inspect the BOTTOM.

http://www.explorerforum.com/forums/showthread.php?t=314670

 

[05dakotatrac]

check the hose to the evap purge solenoid, and the elbow under the passenger side of intake (check the link hawaii put above) never hurts to check for codes.

 

[LONO100]

no CEL? check your battery cables/terminal for bad corrosion, look for any obvious vacum leaks on tubes and hoses, and try testing the manifold for gasket leaks.

 

[joelwc]

Guys I replaced the PCV tubing. I did have a bit of a snafu. There is a small electrical connector that sits directly above the tube on the passenger side front that a wire pulled out of. I have no idea what it is. Any thoughts? Still starts/runs fine.

Edit: Its this connector (from another post)

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