*video* Qx4 dies out, sputters on startup. Idle relearn?

[SimpleSolution]

Ive been having trouble with my Qx4 ever since I pulled the intake manifold off to tighten the ower valve screws. The car is very unreliable to start, it will always start eventually, sometimes after a second of cranking, sometimes 5. But I ALWAYS have to give it a little gas while turning it over or it will stall out after revving to 1k rpm, then just dies unless you pedal it.

I made a video to show what it does. I let it die on the first startup, then I keep it alive with the pedal the second time.
http://s394.photobucket.com/albums/pp26 ... 010629.mp4

Does it kinda differently everytime, this is just what happened this time. Its almost embarassing to start the car around people.

Im thinking I may need to do an idle air relearn or possibly even more?? Ive tried the test for the 2001 specific but I dont know if the test ever took or not. The car does have an aftermarket cold air intake.

Any help is greatly appreciated!!!

[Q451990]

I wish I had something for you... I'm not that familiar with the QX4. Does that year have a traditional cable driven throttle body or had they switched to drive-by-wire by then? Does it idle ok after it's started? I think I'd go back and look for loose vacuum hoses, etc.

I'm assuming you have a copy of the factory service manual? If not check it out at www.nicoclub.com/FSM/

Heath

[SimpleSolution]

My car is cable throttle

Well maybe the IACV is the problem, when I turn heater/brights/rear defrost on, my idle drops 100rpm and holds there

I was trying the steps for the idle air relearn, and it definetely doesnt take, I get to the part where I disconnect the brown plug on the throttle body, wait 3 seconds to plug it back in, and the car stalls out when you plug the sensor back in. (this test is 2001 specific)

Now I am thinking it may be the IACV malfunctioning....

[SimpleSolution]

Is there a good way to test the IACV??

[asnorton44]

Have you tested the MAF? It is notorious for going bad. My 2001 QX4 had similar symptoms and it was my MAF. Try disconnecting the MAF and see how it idles and report back.

[SimpleSolution]

MAF was new 1.5 years ago but sure I'll try that

[SimpleSolution]

the car stalled out and died when I disconnected the MAF plug while it was running....

[asnorton44]

Hmm Ill see if I can figure out anything else it could possibly be.