Sluggish Acceleration 5.4L - Ford Truck Enthusiasts Forums



Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator

Sluggish Acceleration 5.4L

Reply
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 09-14-2002, 07:46 PM
JeffK JeffK is offline
New User
Thread Starter
 
Join Date: Sep 2002
Posts: 16
JeffK is starting off with a positive reputation.
Sluggish Acceleration 5.4L

I just puchased my first Expy (2000 4x4 EB 5.4L) on Sept 12th, and I've noticed something wierd when accelerating.

If I take off from a stop at 3/4 or full throttle and speed up to 50-60mph, I notice the engine/driveline has a sluggish feeling. Kind of like it missing a few sparks here and there?

Has anyone else experienced or heard of this problem? I have 30 days for satisfaction warranty to return the truck for any problems I find at the dealer I purchased from.

Thanks for the help,
Jeff
Reply With Quote
  #2  
Old 09-14-2002, 08:44 PM
bronco351 bronco351 is offline
Posting Guru
 
Join Date: Sep 2002
Posts: 1,154
bronco351 is starting off with a positive reputation.
Sluggish Acceleration 5.4L

I have a 98. 5.4L. Mine is pretty slow off the line also. My suggestion to you is to go to another dealership and test drive another expedition and see if it's the same GOOD LUCK!!!
Reply With Quote
  #3  
Old 09-14-2002, 11:31 PM
JeffK JeffK is offline
New User
Thread Starter
 
Join Date: Sep 2002
Posts: 16
JeffK is starting off with a positive reputation.
Sluggish Acceleration 5.4L

[updated:LAST EDITED ON 14-Sep-02 AT 11:32 PM (EST)]Take-off, Idling and Cruising all seem normal. Toward higher RPMs it seems like it's having a difficult time, with a slight hesitation.
Reply With Quote
  #4  
Old 09-16-2002, 12:03 PM
buzzard's Avatar
buzzard buzzard is offline
Postmaster
 
Join Date: Oct 2000
Location: All over Texas
Posts: 3,945
buzzard is starting off with a positive reputation.
Sluggish Acceleration 5.4L

How many miles on truck? What is outside temperature and humidity? What is your rear gear ratio? All of these can/will affect low-end performance.
Reply With Quote
  #5  
Old 09-16-2002, 08:46 PM
JeffK JeffK is offline
New User
Thread Starter
 
Join Date: Sep 2002
Posts: 16
JeffK is starting off with a positive reputation.
Sluggish Acceleration 5.4L

[updated:LAST EDITED ON 16-Sep-02 AT 08:46 PM (EST)]49,900 Miles. 70 degrees outside with probably 50% humidity. Unsure about the gear ratio.

The more I drive and notice it, I think the engine is running fine. It almost feels more hydrauilc. Like slippage in the Transmission or Transfer Case.

This has All wheel drive selection only. Is this the way that automatic 4WD sounds?
Reply With Quote
  #6  
Old 09-16-2002, 11:03 PM
buzzard's Avatar
buzzard buzzard is offline
Postmaster
 
Join Date: Oct 2000
Location: All over Texas
Posts: 3,945
buzzard is starting off with a positive reputation.
Sluggish Acceleration 5.4L

>49,900 Miles. 70 degrees outside with probably 50% humidity.
>Unsure about the gear ratio. Mileage and temp should be ruled out, but the gear ratio could have something to do with lack of performance.

Expy Gear Ratios (look at tag inside driver door):

19—3.55 NLS
17—3.31 NLS
H9—3.55 LS
H7—3.31 LS
H6—3.73 LS


>
>The more I drive and notice it, I think the engine is
>running fine. It almost feels more hydrauilc. Like slippage
>in the Transmission or Transfer Case. Better take it into a shop.
>


>This has All wheel drive selection only. Is this the way
>that automatic 4WD sounds? It's automatic 4WD and only engages the front wheels when the rear wheels begin to slip. If it is automatically engaging the front wheels, you should hear a series of clicks and clunks. You can always engage and disengage the 4WD manually by turning the switch.

Reply With Quote
  #7  
Old 09-17-2002, 01:31 PM
peterbilt peterbilt is offline
Senior User
 
Join Date: Aug 2002
Location: Austin Tx.
Posts: 111
peterbilt is starting off with a positive reputation.
Sluggish Acceleration 5.4L

Your fuel injectors may need cleaning. Check your 0 to 60 times. Maybe it is OK. If your previous vehicle was smaller maybe it just seems slow.

Pete
Reply With Quote
  #8  
Old 09-25-2002, 05:24 PM
01kaw9r 01kaw9r is offline
New User
 
Join Date: Sep 2001
Posts: 6
01kaw9r is starting off with a positive reputation.
Sluggish Acceleration 5.4L

I know exactly what you are describing. I have a 2000 4X4 XLT with the 4R100 trans. It came with 3.55 gears which I changed to 4.10 with 285X75X16 tires. It feels like the torque converter is just spinning and not transferring the power to the trans. Then all the sudden you can feel it kick in and acceleration picks up. I think it is a combination of the electric trans, lock up torque converter, and programmed shift points being kind of mixed up because of my gear and tire changes. I also installed a Banks transcommand box to firm up the shifts. I noticed this mostly happens when I am crusing about 40 mph and then accelerate hard, and it only seems to last a second or two before you can feel the torque converter start doing its job.
Reply With Quote
  #9  
Old 09-25-2002, 05:43 PM
jaxf250's Avatar
jaxf250 jaxf250 is offline
Elder User
 
Join Date: Aug 2002
Location: Jacksonville, FL
Posts: 513
jaxf250 is starting off with a positive reputation.
Sluggish Acceleration 5.4L

Ford trucks are known to have a soft tranny shift program,
which is prob. contributing to your sense of sluggishness.



My V10 F250 was the same lethargic creature until I reprogrammed
the tranny via the Super Chips tuner - wow, what a difference.

Check the FTE store here to see what options are available
if you want to go that route (modifying the stock computer
settings, that is). Others on the forum may have some valve/hardware options to help as well. Good luck.

-- Bob

2001 F250 SD CC Lariat,
V-10, 4:30, 6' Bed, 4x4, Auto, K&N FIPK-2, SCMT-tuned
Reply With Quote
  #10  
Old 10-17-2002, 08:43 PM
97 awd xlt blue 97 awd xlt blue is offline
Senior User
 
Join Date: Sep 2002
Posts: 202
97 awd xlt blue is starting off with a positive reputation.
Sluggish Acceleration 5.4L

Reply With Quote
  #11  
Old 10-21-2002, 09:16 PM
KHaga KHaga is offline
Freshman User
 
Join Date: Oct 2002
Location: Raleigh USA
Posts: 28
KHaga is starting off with a positive reputation.
Sluggish Acceleration 5.4L

Interesting....I just bought a used 2000 Expy EB with the 5.4L/4R100 with 51K miles and I am experiencing the exact same symptoms as the other 2-3 folks above...In fact, I was searching this forum for that very reason.

My engine idles fine, and I'm getting 12-13 avg MPG around town (with a light foot), but it does feel like it is slightly mis-firing when I am accelerating in a hurry - especially when I am going up an incline of any degree and working the engine harder - in fact, I can hear a slight difference in the engine noise (it sounds like the "purr" of the engine is not quite as smooth as it should sound). When I am driving easy and letting the tranny do the work, it seems to be OK. If I am trying to give it some "go", I then notice a lack of "smoothness" in the engine, but it does kick in.

I feel it is the fuel system that needs cleaning/flushing (as someone above recommended), so that was my first plan of attack.

If anyone gets this fixed, please post the results!!

KHaga in NC
- 2000 Expedition EB, 5.4L/4R100, 4x4
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Reply With Quote
  #12  
Old 06-30-2015, 09:07 PM
Jtomlin Jtomlin is offline
New User
 
Join Date: Sep 2013
Posts: 1
Jtomlin is starting off with a positive reputation.
Quote:
Originally Posted by KHaga View Post
Interesting....I just bought a used 2000 Expy EB with the 5.4L/4R100 with 51K miles and I am experiencing the exact same symptoms as the other 2-3 folks above...In fact, I was searching this forum for that very reason.

My engine idles fine, and I'm getting 12-13 avg MPG around town (with a light foot), but it does feel like it is slightly mis-firing when I am accelerating in a hurry - especially when I am going up an incline of any degree and working the engine harder - in fact, I can hear a slight difference in the engine noise (it sounds like the "purr" of the engine is not quite as smooth as it should sound). When I am driving easy and letting the tranny do the work, it seems to be OK. If I am trying to give it some "go", I then notice a lack of "smoothness" in the engine, but it does kick in.

I feel it is the fuel system that needs cleaning/flushing (as someone above recommended), so that was my first plan of attack.

If anyone gets this fixed, please post the results!!

KHaga in NC
- 2000 Expedition EB, 5.4L/4R100, 4x4
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I have same problem i know its been yr for this. But some times mine gets up and goes and some time it doesnt. Only thing i havnt tryed was changing the both vts. My wifes trail blazer was doing same thing with no trouble codes. I changed hers for the heck of it , got all power back and gas millage so might just throw them in my 06 f250 5.4l and see if that works
Reply With Quote
  #13  
Old 07-14-2015, 05:14 PM
ltmark ltmark is offline
New User
 
Join Date: Mar 2014
Posts: 1
ltmark is starting off with a positive reputation.
good day. I was searching for a similar problem over the last few days. Fixed my issue!!! Here's the info..

2003 expy 198,000mi 5.4

Drove OK at low speed but had extremely poor acceleration when giving gas. Really poor up hill and the tranny would shift erratically and the RPM's would stay high going uphill. Also, the pedal had a slight catch in it when starting out once in a while. Initially afraid it might be clogged cats!

The fix. I replaced the TPS (throttle position sensor). 32.00 bucks. However, it had no effect initially.!!! Then I remembered that I probably needed to reset the ECM so .... disconnect the battery for 5 minutes (when the engine is cold). Then start it and let it warm up in the driveway. DO NOT DRIVE until it is warm and has had time to go through the ECM recalibration! After that, it drove like new!

Hope this helps someone with similar problem!

Mark M
Murrieta, Ca
Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Acceleration Problems - Running out of ideas. Any help? Rick_Ford 2004 - 2008 F150 6 09-01-2016 10:18 PM
2008 5.4 expedition sluggish ruschejj 2007 - 2014 Expedition & Navigator 17 11-26-2015 09:13 AM
Sluggish/lack of power under hard acceleration Pro DIY Expedition & Navigator 53 09-18-2015 03:04 PM
2003 Expedition running sluggish creed7276 1997 - 2003 F150 5 08-06-2013 06:58 PM
Sluggish Acceleration after filter change?? zarillus Expedition & Navigator 11 01-27-2009 04:12 PM


Go Back   Ford Truck Enthusiasts Forums >

Tags
2000, 2001, 54, 54l, acceleration, expedition, expeditoin, f150, feels, ford, runs, slow, sluggish, slugish, start

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


All times are GMT -5. The time now is 08:54 AM.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.