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87 GMC Jimmy 5.0L help!!!

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by 87project, Jul 13, 2002.

  1. 87project

    87project Registered Member

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    just bought it ,and it ran fine for a week or so ,and now as soon as the motor is ran for about 10 minutes or so when driving, (does fine just idling) it starts misfiring, and dying,and then its hard to get cranked until it's cooled off,any ideas? /forums/images/icons/confused.gif /forums/images/icons/mad.gif /forums/images/icons/crazy.gif
     
  2. jimmyjack

    jimmyjack 1/2 ton status

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    Vapor lock? Try putting some wood clothespins on the metal part of the fuel line
     
  3. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    Get it warmed up and being a PIA. Then when its doing this, take off the aircleaner and have a look. With the engine running, preferably. The front barrels on your carburetor has a little flap on it called a choke. When its cold, it should be covering the front barrels up, when its warmed up, the flap should open in the vertical position.

    Your engine runs off of fuel that is in a vaporized form. This is called atomization. A cold engine does not lend itself well to atomization and the choke helps this. It restricts the amount of iar making a richer mixture because of this inefficent fuel deliver when cold. Things warm up and the choke comes off.
     
  4. 87project

    87project Registered Member

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    guess I should have mentioned before,it is fuel injected /forums/images/icons/blush.gif /forums/images/icons/confused.gif
     
  5. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    Duh, 87. Am I bad. Try your coolant tempature sensor. Take a look to the left of your water neck, that sensor.
     
  6. Thunder

    Thunder 3/4 ton status

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    It could be a number of things causing your problems, Temp sensor as said above, Pick up coil, module, ect ect,

    You need to bring up the trouble codes that are stored on the computer. it will help a lot to find the problem and save you from needlesy replacing parts.

    Click Here(link)GM Trouble Code Info
    This site tells you how to retreve the codes and what they mean.
    The Data Link Connector is located on the bottom of the dash under the steering wheel.
    Once you get the code(s) post them and it wil help us to find the problem.
    BTW... Welcome to CK5 !
    And the wonderful world of Computer Controlled Vehicles. /forums/images/icons/confused.gif
     
  7. 87project

    87project Registered Member

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    thanks!! clothes pins worked on sputtering issue but still hard to crank after motor gets warm(if truck is cold it will crank right up)
     

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