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i tried searching but

Discussion in 'The Garage' started by oatsk5, Aug 10, 2006.

  1. oatsk5

    oatsk5 1/2 ton status Premium Member GMOTM Winner

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    so i just put a set of headers on my 400 sbc and know it pops through the exhaust and has a big lack of power the headers are off another truck i had it really agrivating as the ruck needed a tune up and i did that at the same time and i verified the wires and what not any help would be nice
     
  2. bandit4369

    bandit4369 Registered Member

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    I'd put my money on the tune up, not the headers unless, you had an O2 sensor before and you didn't hook it back up when you changed to the headers.
     
  3. 81K5GUY

    81K5GUY 1/2 ton status

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    make sure you got the right plugs in it
     
  4. big dan

    big dan 1/2 ton status Premium Member

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    didnt cross wires did you? when I put new wires on mine recently I got a little careless and switched up the number one and two cylinders so the wire for number one was on number two. it sounded like a gun going off each time one of those two cylinders hit.
     
  5. theperfectgarage

    theperfectgarage 1/2 ton status

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    Kinda sounds like a misplaced plug wire. Also make sure no collector leaks, that can cause backfireing ( especially when you let off the throttle ).

    Fresh air at the collector area re-ignites unburnt fuel in your exhaust and " pops".
     
  6. pauly383

    pauly383 Daddy383 Staff Member Moderator

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    Of course you adjusted the timing and carb afterwards , right ? The engine can breathe better now , its going to run a little bit differently now , its scavenging the cylinders a lot better now .
     
  7. blazinzuk

    blazinzuk Buzzbox voodoo Premium Member GMOTM Winner

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    I vote for plug wires on wrong.
     

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