Page 1 of 2 12 LastLast
Results 1 to 15 of 19

Thread: Hesitation

  1. #1
    Join Date
    May 2015
    Location
    Dallas tx
    Age
    45
    Posts
    17

    Hesitation

    I changed the fuel pump and filter but I'm still getting hesitation around 30 to 40 mph. Could it be my injectors?

  2. #2
    Join Date
    Nov 2010
    Location
    Lincoln, NE
    Posts
    408
    Have you checked your plugs/coils? Could be bad coils.
    2003 MM 300A
    #734 of 7,093 BLK
    Build date: 6/6/2002
    Adopted: 10/27/2014

    K&N CIA, J-Mod, 4.10s 31 spline, Lowered
    Mo's tune & Stainless Works Headers Flomaster 40's


  3. #3
    Join Date
    Jan 2004
    Location
    Somewhere in the N.C. Triangle
    Age
    68
    Posts
    26,250
    Did you attempt any kind of problem determination before changing parts?
    “When you can’t make them see the light, make them feel the heat.”
    Ronald Regan

    "The only way to deal with the Islamic State - these blood thirsty, blood-drunken, terrorists -
    is to kill them, keep on killing them, until you kill the last one, then you kill his pet goat."

    Lt. Colonel Ralph Peters

    “Be polite, be professional, but have a plan to kill everybody you meet.”
    "I come in peace. I didn't bring artillery. But I'm pleading with you, with tears in my eyes, if you **** with me, I'll kill you all"
    General James Mattis




  4. #4
    Join Date
    Oct 2008
    Location
    Windsor
    Age
    38
    Posts
    219
    dirty mass air flow sensor

  5. #5
    Join Date
    May 2015
    Location
    Dallas tx
    Age
    45
    Posts
    17
    Mass air flow new, plugs new how do I check coils?

  6. #6
    Join Date
    Nov 2010
    Location
    Lincoln, NE
    Posts
    408
    Unless you have an oscilloscope to check the pattern the easiest way is to swap them out with good known coils. No misfire codes?
    2003 MM 300A
    #734 of 7,093 BLK
    Build date: 6/6/2002
    Adopted: 10/27/2014

    K&N CIA, J-Mod, 4.10s 31 spline, Lowered
    Mo's tune & Stainless Works Headers Flomaster 40's


  7. #7
    Join Date
    Feb 2015
    Location
    South Florida
    Posts
    1,117
    If one coil is bad, change them all... Save yourself a headache later.

    Righteous Indignation
    03 300A
    4055 of 7838
    4054 of 7093 in Black.
    Born 8/23/02
    Adopted in 1/15
    SOLD

  8. #8
    Join Date
    Sep 2013
    Location
    Aurora, Illinois
    Age
    50
    Posts
    882
    You need a tune! I felt the same thing when I bought mine, and when I got a tune from Mo it disappeared.
    Buying things I don't need, with money I don't have, to impress people I don't know!!!
    Production #1489 of 3213/#516 of 997

  9. #9
    Join Date
    May 2015
    Location
    Dallas tx
    Age
    45
    Posts
    17
    Good Lookn champ any suggestions on a good shop to have it tuned and serviced in or near Dallas

  10. #10
    Join Date
    Sep 2013
    Location
    Aurora, Illinois
    Age
    50
    Posts
    882
    Look under "Forums" here. Go down to Supporting Vendors, n you'll see, "Mo's Speed Shop." If you have a hand held unit, (SCT) he could send a tune to your email, and you could just download it to your unit. If not, he could set you up w a tuner, n tune. I got mine from him, as well as many other members. He's good people!
    Buying things I don't need, with money I don't have, to impress people I don't know!!!
    Production #1489 of 3213/#516 of 997

  11. #11
    Join Date
    Feb 2009
    Location
    Upstate NY
    Posts
    4,373
    Yes, ^^^ Mo's is good but get it running right before you put a tune in it.

    Tips: Clean throttle body and upper intake use Seafoam, blast it. Clean IAC, and your TPS they are on the throttle body. Airfilter is new too I assume. If you have 10+ year old COPS id say it's time for a new set. How many miles?

    If you only feel a buck/stumble at light throttle at 30-40 it could also be your EGR/DPFE sensor or transmission - possible but less likely.
    2021 F150 XLT Super Crew short bed - no chrome! - 3.5 Ecoboost 400hp/500tq - 36 Gal tank (600 miles) - 4x4 FX4 Offroad + Max Tow - 3.55 Locker - 10 Speed - Pro Power 2kva - 24mpg @ 80 Ford is still the best.
    03 300A - Number 1727
    - Super Touring - 10k in the best upgrades - 13.8@99 N/A - SOLD
    - STAP was so much fun, loved meeting you all and racing.



  12. #12
    Join Date
    Sep 2013
    Location
    Aurora, Illinois
    Age
    50
    Posts
    882
    Quote Originally Posted by babbage View Post
    Yes, ^^^ Mo's is good but get it running right before you put a tune in it.

    Tips: Clean throttle body and upper intake use Seafoam, blast it. Clean IAC, and your TPS they are on the throttle body. Airfilter is new too I assume. If you have 10+ year old COPS id say it's time for a new set. How many miles?

    If you only feel a buck/stumble at light throttle at 30-40 it could also be your EGR/DPFE sensor or transmission - possible but less likely.
    He said he's changed this, n cleaned that, n still has the stumble. It's because of the stock tune, n the crappy shifting schedule. Mine did the same exact thing being all stock, and I tried doing the same thing the OP is now doing. The tune fixed it for me.
    Buying things I don't need, with money I don't have, to impress people I don't know!!!
    Production #1489 of 3213/#516 of 997

  13. #13
    Join Date
    May 2015
    Location
    Dallas tx
    Age
    45
    Posts
    17
    Will do good Lookn fellas! Just tryna get her right!

  14. #14
    Join Date
    May 2015
    Location
    Dallas tx
    Age
    45
    Posts
    17
    Ok fellas I can't figure out how the water is getting in the passenger side rear of my car when it rains. Any ideas of how this is happening??

  15. #15
    Join Date
    Sep 2002
    Location
    Cape Cod, MA
    Posts
    13,676
    Changed the thread title to more accurately reflect the OP's issue.
    The Blackbird
    Trilogy #61
    Driveway Queen

    The Spruce Goose
    2004 Grand Marquis LS Limited Edition
    Daily Driver

Page 1 of 2 12 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. low rpm stutter/hesitation
    By dwrwebb in forum Shop Talk
    Replies: 7
    Last Post: 09-02-2010, 03:58 PM
  2. Hesitation
    By lucenti in forum Shop Talk
    Replies: 1
    Last Post: 12-07-2008, 11:45 AM
  3. Abnormal Hesitation @ WOT in 1st and 2nd
    By RedMerc04 in forum Community Discussion
    Replies: 24
    Last Post: 08-15-2008, 09:36 AM
  4. Irradic hesitation
    By OneBADLsE in forum Shop Talk
    Replies: 9
    Last Post: 10-04-2007, 05:45 PM
  5. Hesitation at 4-5,000 rpm...
    By 89VERT in forum Shop Talk
    Replies: 28
    Last Post: 03-11-2005, 11:24 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •