Rough Idle and Stalling

02gator
10

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

5 Answers

Jeff Leeper

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 out of 1 people think this is helpful.
02gator
10

thanks, I will give it a try!

1 out of 1 people think this is helpful.
Mannylolow210
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 out of 6 people think this is helpful.
2003navigator
0

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!

2003navigator
0

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

Your Answer

Add photo

Related Questions

  • Code P0171 and P0174 Along with P0430 (Pending) 3 answers

    Hello: 183k miles on 2004 Navigator. Had it for a long time and is well maintained. Started running very rough and loud (sounds like a diesel engine) and stalled when cold. Took it to a fairly tru...

    2004 Lincoln Navigator Ultimate 4WD

    -

    Maintenance & Repair

  • 2003 Lincoln Navigator bucking and Shutting off. Need Help! 3 answers

    Hello, My wife has a 2003 lincoln navigator. We have a problem with the car bucking. The truck now will buck and then run really rough and struggle to maintain speed. Sometimes, if I let off the thr...

    2003 Lincoln Navigator Luxury 4WD

    -

    Maintenance & Repair

  • Truck stall intermittently 2 answers

    I own a Navigator. 2000 Supercharged 2WD. V8 5.4L. I had the tranmission rebuilt. I had a new rear wheel sensor, a throttle position sensor, and NEW computer installed. Problem. I can start the truck ...

    2000 Lincoln Navigator Base

    -

    Maintenance & Repair

  • please help 7 answers

    I purchased this vehicle from the dealership. Drove 3 weeks and parked outside overnight. The next day it started and after a few minutes on the road it started stalling. Ignition stopped, wait a fe...

    2006 Lincoln Navigator Ultimate 4WD

    -

    Maintenance & Repair

  • 2005 Lincoln Aviator. Stalls when warm, rough idle. 2 answers

    2005 Lincoln Aviator. Stalls when warm, rough idle. too lean code. I have changed the o2 sensors, MAF, fuel filter, spark plugs and coil packs. The fuel pressure is 25 running.Any ideas? Do I try a ...

    2005 Lincoln Aviator Luxury AWD

    -

    Maintenance & Repair

Navigator

Looking for a Used Navigator in your area?

CarGurus has 6,138 nationwide Navigator listings starting at $2,750.

ZIP:

Search Lincoln Navigator Questions

Lincoln Navigator Experts

#1 jimmyarango
jimmyarango
Reputation 1,100
#2 T_S_T
T_S_T
Reputation 340
#3 dandyoun
dandyoun
Reputation 230
View All

Related Models For Sale

Used Ford Expedition"
336 Great Deals out of 19,852 listings starting at $1,395
Used Cadillac Escalade"
214 Great Deals out of 8,585 listings starting at $2,328
Used Chevrolet Tahoe"
608 Great Deals out of 30,330 listings starting at $2,445
Used Chevrolet Suburban"
398 Great Deals out of 21,101 listings starting at $1,995
Used Ford Explorer"
759 Great Deals out of 53,722 listings starting at $950
Used GMC Yukon Denali"
123 Great Deals out of 8,071 listings starting at $3,995
Used Cadillac Escalade ESV"
117 Great Deals out of 4,829 listings starting at $3,595
Used GMC Yukon"
206 Great Deals out of 9,436 listings starting at $2,495
Used Ford F-150"
2,227 Great Deals out of 207,901 listings starting at $991
Used Lincoln Aviator"
6 Great Deals out of 264 listings starting at $2,500
Used GMC Yukon XL Denali"
104 Great Deals out of 5,703 listings starting at $3,977
Used GMC Yukon XL"
137 Great Deals out of 6,765 listings starting at $2,995

Used Cars For Sale

2015 Lincoln Navigator Base 4WD For Sale
307 listings starting at $42,977
2014 Lincoln Navigator Base 4WD For Sale
3 Great Deals out of 74 listings starting at $34,990
2013 Lincoln Navigator Base 4WD For Sale
7 Great Deals out of 100 listings starting at $27,900