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exhaust popings sound

Discussion in 'The Garage' started by dheavychevy38, Apr 28, 2005.

  1. dheavychevy38

    dheavychevy38 1/2 ton status Premium Member

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    ok i have a 94 burban with a tbi 5.7 i recently acquired a poping sound out of the exhaust i think it is in the valve train. Any ideas or common problems with these motors anyone knows of thanks
     
  2. slimlynn1

    slimlynn1 1/2 ton status

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    When does it make the popping sound, is it all the time or only when cold?
     
  3. dheavychevy38

    dheavychevy38 1/2 ton status Premium Member

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    all the time plus if you give it gas it back fires through the passenger side of the tbi
     
  4. kyser_soze

    kyser_soze 1/2 ton status

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    It sounds like you have to adjust your valves.
     
  5. diesel4me

    diesel4me 1 ton status Premium Member

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    lotsa things can do it...

    Could be a valve problem,an exhaust valve might be burnt,or a valve spring broke,a lifter might have pumped up and is holding a valve open.,a broken rocker arm,bent pushrods,maybe a flat cam lobe--could be spark related too,timing off,bad plug wire,fouled plug,distibutor cap cracked,bad rotor,--also an air pump can cause backfiring if the diverter valve on it fails(not all trucks have AIR pumps)....time to get the tools out..good luck.. :crazy:
     
  6. dheavychevy38

    dheavychevy38 1/2 ton status Premium Member

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    thanks guys i am giveing it a full tune up and checking timeing on saturday i will also yank the valve covers and give it a look
     

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