Welcome to the GMTC - Chevy Truck Forum.
Chevy Truck Forum

GM Truck Club is the premier Chevy Truck Forum & GMC Truck Forum online ~ Since 2004.
Registered Users do not see the above ads. Register Today ~ It's Free and gives access to the whole website.

+ Reply to Thread
Results 1 to 6 of 6
  1. #1
    Newbie Truck is a glorious beacon of light
    Join Date
    Feb 2009
    Location
    Tampa, FL.
    Posts
    9
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default lack of power to burst of power 4 cyl 2.5

    Hi Guys, John from Tampa, I have a 1987 S-10 4 cyl 2.5 with only 59,000 miles, great little truck. I just put rotor cap wires and plugs. It has good compression and runs only ok. If I try to accelerate to fast it will bog down, If I ease into the gas pedal it does better and then hits a a higher RPM and gives a burst of power and runs strong once you get it going. Any Ideas??
    Thanks
    John

  2. #2
    Legend Springthing has a reputation beyond repute
    Join Date
    Aug 2008
    Location
    East of Branson, Missouri
    Posts
    2,789
    Mentioned
    0 Post(s)
    Tagged
    1 Thread(s)
    Blog Entries
    14

    Default

    Through all gears? Timing issue..?.. anyone..?..
    Steven



    "The Sarge"
    1999 Chevy Suburban LT- K2500
    7.4 454 Vortec, 4WD
    305/70/16 on Eagle Alloy




  3. #3
    Newbie Truck is a glorious beacon of light
    Join Date
    Feb 2009
    Location
    Tampa, FL.
    Posts
    9
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Shifts good in all gears 700 r Automatic works well

  4. #4
    Legend cascott325 is a glorious beacon of light
    Join Date
    Aug 2008
    Location
    Lawrenceburg, Kentucky
    Posts
    1,709
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    the vehicle being that old, assuming under average conditions, i can guess that you have some hoses that are cracked causing maybe a vaccume leak. not sure what i am getting into there, but i have a cooworker with an older s-10 and quite a few of his lines are dry rotted pretty badly. i would start checking all you lines and hoses, make sure your wires are connected where they should be. did you do the plugs? if so, did you gap them. is this reaction due to the tune up or was it pre-existing? and welcome
    2000 silverado with a 5.3l v8, shorty headers, upgraded plugs, 10 mil wires, magnaflow high flow cats, flowmaster 80 series muffler(2 in 2 out) w/ 18 inch stainless silverline tips. i have a k&n CIA. its a 4x4 z71 offroad package. Ls model.
    extended cab 160k miles, truxedo low profile bed cover, diablo sport predator tuner.
    reman tranny @ 130k miles
    Chris

  5. #5
    Newbie Truck is a glorious beacon of light
    Join Date
    Feb 2009
    Location
    Tampa, FL.
    Posts
    9
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    New problem, I did replace some old vacuum hoses will check again, Im leaning toward timing but I am not sure about the instructions on the radiator support. It says ground out the lead to the computer. Im have access to a timing light but hesitant ground out something leading to the computer. And not sure which wire.

  6. #6
    Newbie Truck is a glorious beacon of light
    Join Date
    Feb 2009
    Location
    Tampa, FL.
    Posts
    9
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Default

    Thanks all for the suggestions, I was able to locate the disconnect for the computer under the dash and advanced the timing to about 14 degrees, RUNS GOOD now without any knock or running hot, only a few vacuum lines, instead of cutting back a few ends I'm replacing them all.
    My neighbors dad bought this new back in 1987 and it is still clean as a whistle with only 59K miles, cool little truck. I didn't need it but I couldn't pass it up. And now I think its the neatest thing. Very nostalgic will post some pictures,
    Thanks Again
    John


 

Similar Threads

  1. Replies: 0
    Last Post: 03-24-2010, 01:50 PM
  2. Lack of power in reverse
    By Carpenter98 in forum Powertrain
    Replies: 2
    Last Post: 01-03-2010, 07:27 PM
  3. Hesitation/lack of power
    By Slow1500 in forum Powertrain
    Replies: 6
    Last Post: 08-05-2008, 10:16 PM
  4. 12V power outlet looses power
    By jstroud08 in forum Audio / Video Electrical
    Replies: 4
    Last Post: 10-22-2007, 05:38 PM
  5. Crane Cams Power Max Power-Tuner [Expired Topic]
    By udderchaos in forum Chevy Suburban Forum (GMC Yukon XL)
    Replies: 3
    Last Post: 11-14-2006, 08:58 PM

Tags for this Thread

Posting Permissions

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