exhaust popping

Discussion in 'Small Block Tech' started by maseusmc, Jun 20, 2015.

  1. maseusmc

    maseusmc Gunny G

    So I took my car out for a drive and started hearing popping from my pipes. Is this a good thing or bad? They don't pop when the car is idleing just when I rev up the engine.
  2. Clanceman427

    Clanceman427 Hardtops need not apply

    Just revving in neutral/ park with no load on the engine? If it's on deceleration or engine braking that can be caused by exhaust manifold leak
  3. 1970 STAGE 1

    1970 STAGE 1 Well-Known Member

    Popping from the intake on acceleration , broken valve spring .
  4. moleary

    moleary GOD Bless America

    or flatting cam...
  5. exfarmer

    exfarmer Well-Known Member

    If it's popping from the exhaust it probably meens one or more cylinders are misfiring. Could just be a spark plug that fails under load.
  6. maseusmc

    maseusmc Gunny G

    It doesn't pop when it starts, or when the engine is warming up. It's only popping when I have been driving for a about 20 mins.
  7. afracer

    afracer Well-Known Member

    Install new plugs and wires.
  8. maseusmc

    maseusmc Gunny G

    New plugs and wires were installed. New manifold gaskets installed. New starter, alternater, and the carabutor was just rebuild a few days ago.
  9. rtv72

    rtv72 Founders Club Member

    Do you have points, engine 350-455??? if so check the dwell 28-30 deg's, make sure the contacts are not burnt, voltage with points closed should be 5-5.5 volts, then reset timing to spec. The coil could be breaking down when hot, so check the resistance, primary 1.28- 1.42 and secondary 7200-9500. Also make sure your distributor shaft bearing in not worn out, check vac advance and advance weights are working properly. Good Luck! sounds like electrical problem.:TU:

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