Rough Idle and Stalling

10

Asked by Jul 15, 2011 at 05:41 PM about the 2002 Lincoln Navigator 4WD

Question type: Maintenance & Repair

I have 2002 with the 5.4 that has been idling rough and now stalls after its warm when at stop signs or if i go from park to reverse.  I have replaced the PCV valve cleaned the mass airflow sensor along withe replacing the idle air control valve.  Just to make sure when i replaced the idle air contol valve i lubed it and made sure all of the parts were moving freely.  I took it to AutoZone and it is throwing code P1504 saying there is an electrical load failure on the IAC i have checked to make sure there is power and the harness is in good shape and it still has the same problem.  Does anyone have any advice or see anything i may have missed?  Oh and i have checked closely for vaccuum leaks.

7 Answers

Does the vehicle maintain rpms at idle or is it loping erratically? Try disconnecting the alternator and running the car. You may have alternator interference causing the problem. If that is the case, replace the alternator.

1 of 1 people found this helpful.
10

thanks, I will give it a try!

1 of 1 people found this helpful.
60

I have this exact same problem and it seems as though it got worse when i put in a new alternator ive been reading alot about this EGR FILTER AND SENSOR and am curious as to whether or not this could be it does anyone know for sure?

6 of 6 people found this helpful.
30

Mine just out of the blue started to bog when I put my foot on the gas. It began an unsteady idle but then sometimes go into a steady idle. But if I got on the gas it bogged and shuddered. I brought it to a shop and they replaced the fuel filter and EGR valve cause it appeared to have a burned up side and missing hose.. Well 243$ later it all still remained.. Messed up idle and boggy running state. Last night while driving the battery light went nuts and the car just shut down and I coasted off the road. Then started right and I drove off!! Any ideas guys.. Everyone's baffled!

2 of 2 people found this helpful.
30

I'm told def ain't a bad gas issue at all. Check this out guys who understand the mechanical end.. I really don't but this seems logical .. Thanks http://www.youtube.com/watch?v=K- jzYTKuTvg&sns=em

1 of 1 people found this helpful.

Checking the codes...mine did the same thing...you might have a bad coil and it misfires...I did and that solved the problem.

10

I have a 5.4 Lincoln Navigator sudenly stop running and now with sevetal batterys start low and the engine don't function, the red light of oil was in red

1 of 1 people found this helpful.

Your Answer

Navigator

Looking for a Used Navigator in your area?

CarGurus has 3,631 nationwide Navigator listings starting at $1,999.

ZIP:

Lincoln Navigator Experts

  • #1
    jimmyarango
    Reputation
    1,630
  • #2
    T_S_T
    Reputation
    440
  • #3
    dandyoun
    Reputation
    330
View All

Related Models For Sale

Used Ford Expedition
491 Great Deals out of 20,301 listings starting at $1,500
Used Cadillac Escalade
277 Great Deals out of 12,214 listings starting at $2,995
Used Chevrolet Tahoe
848 Great Deals out of 40,197 listings starting at $1,700
Used GMC Yukon
516 Great Deals out of 19,539 listings starting at $1,995
Used Chevrolet Suburban
518 Great Deals out of 23,485 listings starting at $1,995
Used Cadillac Escalade ESV
149 Great Deals out of 6,377 listings starting at $1,995
Used Ford F-150
3,116 Great Deals out of 231,593 listings starting at $1,300
Used GMC Yukon XL
299 Great Deals out of 13,403 listings starting at $1,750
Used Ford Explorer
1,142 Great Deals out of 68,757 listings starting at $1,200
Used Land Rover Range Rover
71 Great Deals out of 3,729 listings starting at $2,850
Used Dodge Durango
274 Great Deals out of 25,034 listings starting at $1,500

Used Cars For Sale

2015 Lincoln Navigator 4WD For Sale
184 listings starting at $25,500
2014 Lincoln Navigator 4WD For Sale
7 Great Deals out of 102 listings starting at $16,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.