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Thread: 350 aggresive surging in gear with moderate throttle.
          
   
   

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  1. #1
    shawnlee28's Avatar
    shawnlee28 is offline CHR Member Visit my Photo Gallery
    Join Date
    May 2004
    Location
    so.cal
    Car Year, Make, Model: 66 c 10 fleetside longbed
    Posts
    1,942

    You installed a bigger pump/gas line for the 350?
    Its gunna take longer than u thought and its gunna cost more too(plan ahead!)

  2. #2
    69elko's Avatar
    69elko is offline CHR Member Visit my Photo Gallery
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    Jan 2007
    Location
    San Jose
    Car Year, Make, Model: 1969 El Camino SS396 350HP
    Posts
    227

    How old is this 350? Could it be a worn out and stretched timing chain?

  3. #3
    MadMax's Avatar
    MadMax is offline CHR Member Visit my Photo Gallery
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    May 2004
    Location
    Munich
    Car Year, Make, Model: 1983 Chevy 5,7l G20
    Posts
    213

    Maybe a broken vacuum hose to the distributor? Would be the easiest guess, sometimes it's the little things... I had exactly your problem and traced it to a cracked hose. you wouldn't even see the crack, but the moment you rev suddenly higher, vacuum gets higher fast (if your on ported vac), that's enough to drag a bit of air through the crack, f**k up your timing and get the engine into low revs again. when revving low the whole game starts over...
    JMO, Max
    Harharhar...

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