Results 1 to 7 of 7

Thread: 04 F150 no injector pulse to one cylinder????

  1. #1
    Senior Member Chevy_Finatic79's Avatar
    Join Date
    Mar 2008
    Location
    Lincoln NE
    Posts
    494

    Angry 04 F150 no injector pulse to one cylinder????

    I am working on an 04 F150 4x4 with about 75K on the 5.4 triton. I could feel the misfire as it sits and idles so i one at time pulled coil wires to determine which cylinder was missing It turned out to be The second cylinder from the front of engine on the passenger side..

    well at first i thought it was the coil pack gone bad so i swapped coils on 2 cylinders to see if the miss changed and it didnt so i sctrached my head and got out the Noid lights and checked for injector pulse.

    and every single injector except the second one back on the pass side had a pulse I looked at the connecter no loose wires or broken terminals and inspected the wires no breaks I am confused how only one cylinder doesnt have a pulse and no broken electronics If you have ever encountered this problem please reply
    "She's gonna Freak when she see's my wheels"

    85' Chevy C-10 Longbox (Rat)
    TBI 327 Cu.In./THM350

    90' Chevy Suburban 4x4
    TBI 350 Cu.In./700R4

    http://www.truckforum.org/forums/truck-pictures-176.htm

  2. #2
    Senior Member
    75K30's Avatar
    Join Date
    Jul 2006
    Posts
    3,690
    It is still a COP problem. You have either water or anti freeze inside of the spark plug hole, and it has to be replaired. This water intrusion prevents the spark from reaching the plug and the plug will not fire. This lack of fire prevents the injector from changing state, and you will troubleshoot it till the cows come home without a positive result.
    Remove the plug, using the proper procedure and you should be fine after that.
    Often washing an engine or driving after some serious rain can result in this type os symptom.
    Id be willing to wager a cold adult beverage on this one.

  3. #3
    Senior Member Chevy_Finatic79's Avatar
    Join Date
    Mar 2008
    Location
    Lincoln NE
    Posts
    494
    what is the proper procedure exactly? I very rarley work on ford and the rumor is this motor likes to break the spark plugs off in the cylinder head when you try to remove them. you were referring to removing the spark plug correct? just so we are clear and not referring to the COP
    "She's gonna Freak when she see's my wheels"

    85' Chevy C-10 Longbox (Rat)
    TBI 327 Cu.In./THM350

    90' Chevy Suburban 4x4
    TBI 350 Cu.In./700R4

    http://www.truckforum.org/forums/truck-pictures-176.htm

  4. #4
    Senior Member
    Join Date
    Dec 2007
    Posts
    1,645

  5. #5
    Senior Member Chevy_Finatic79's Avatar
    Join Date
    Mar 2008
    Location
    Lincoln NE
    Posts
    494
    Great !!!! So I need to buy a special tool imagine that That is why i hate Fords never a strait forward way to fix them with tools on hand
    "She's gonna Freak when she see's my wheels"

    85' Chevy C-10 Longbox (Rat)
    TBI 327 Cu.In./THM350

    90' Chevy Suburban 4x4
    TBI 350 Cu.In./700R4

    http://www.truckforum.org/forums/truck-pictures-176.htm

  6. #6
    Senior Member
    Join Date
    Dec 2007
    Posts
    1,645
    If you do decide to tackle it be very careful. I have heard of guys setting out just to do a plug change and it ending up costing them $2500.
    Ford should hang its head in shame.

  7. #7
    Senior Member tjzz4's Avatar
    Join Date
    Oct 2007
    Posts
    459
    You can get the plugs out.. Just be very careful to follow the steps exactly. I like to break them loose 1/8-1/4 turn and spray gunk engine degreaser in the hole along with some WD-40 to help it penetrate... allow to sit at least 1 hour. overnight is better. Then tighten and loosen the plug coming out a little further each time until it is a couple turns out at least. be sure to keep the socket straight on the plug by holding your ratchet on both ends as you turn... Should be fine 95% of the time. 75K is right on as usual... When the PCM sees a type A misfire (dead miss) it will kill injector pulse to that cylinder. this helps save the cat converter from being destroyed by raw fuel.
    Last edited by tjzz4; 03-11-2010 at 05:11 PM. Reason: spelling

Similar Threads

  1. Loud injector
    By pepper in forum Ford Truck Forum
    Replies: 15
    Last Post: 01-20-2010, 04:42 PM
  2. new spider injector now have a mis/jerk
    By Big Red Chevy in forum Chevy Truck Forum
    Replies: 5
    Last Post: 11-25-2009, 04:46 PM
  3. Colorado/Canyon 4 cylinder/5 cylinder
    By songkrai in forum Chevy Truck Forum
    Replies: 10
    Last Post: 08-23-2009, 01:05 PM
  4. injector pump
    By bradrhale in forum Other Trucks
    Replies: 3
    Last Post: 04-22-2009, 02:11 PM
  5. Injector Problems - Help
    By TxToyMan in forum Dodge Truck Forum
    Replies: 2
    Last Post: 07-15-2007, 12:31 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
  •