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Thread: truck will not start HELP!!!

  1. #1
    Join Date
    May 2008
    Location
    verona, virgina
    Posts
    626

    truck will not start HELP!!!

    well i just fiished putting headers on the 86 silverado and building a y pipe and instaling a highflow cat. i also put in new plugs gapped correctly new wires edelbrock carb and new fuel line with clear filter. well i double checked and rechecked all my plug wires before i even tried to start it up. go to crank and it seems to struggle to turn the motor over. the original started started to struggle and smoke so i put a new one on that i had laying in the building. still the same thing. i went as far as putting the batt in out of my yukon and it will turn over but get to a point like the timing is way off and it will not crank or struggles. anyway im out of ideas and i need to get this truck on the road before next week. anyone got any ideas?
    03 yukon xl:intake, longtubes ory,performabuilt lvl2,circle D 278,tune, tint, lt1 fans
    92 z28: lb9 air foil vette servo magnaflow catback adjustable pan hard rod Lcas lcarbs
    86 trans am: lm7 hot cam th350 3500 stall

  2. #2
    Join Date
    Dec 2007
    Location
    College Station, TX
    Posts
    1,464
    is the carb getting gas?

  3. #3
    Join Date
    May 2008
    Location
    verona, virgina
    Posts
    626
    yup i made sure of that. filter is filling full of fuel carb is squirting. it ran fine before i took the stock manifolds off and changed the plugs/wires.
    03 yukon xl:intake, longtubes ory,performabuilt lvl2,circle D 278,tune, tint, lt1 fans
    92 z28: lb9 air foil vette servo magnaflow catback adjustable pan hard rod Lcas lcarbs
    86 trans am: lm7 hot cam th350 3500 stall

  4. #4
    Join Date
    Sep 2007
    Location
    Hutto TX
    Posts
    467
    If your timing was way advanced/retarded to begin with, maybe you are putting number one wire on the wrong post of the distributor.

    Did you MARK the distributor as to where the #1 wire came off of it? If not....

    I would pull #1 plug, find TDC, pull the dizzy and restab it with the rotor facing the #1 cylinder and then put your #1 wire on that post and go from there. Start from nothing, cause you have too many unknowns.
    1991 Silverado ECLB
    LM7-T56

  5. #5
    Join Date
    Apr 2008
    Location
    Las Vegas , NV
    Posts
    84
    by chance did you remove the distributor? I have put the distributor in 180 degrees off and cause similar problems.
    07 ECSB 5.3 , Corsa Sport Exhaust , Magnaflow Catted Y-pipe, SLP Cold Air Intake , Corvette Servo, Tinted taillights , HP tuners Debadged

  6. #6
    Join Date
    May 2008
    Location
    verona, virgina
    Posts
    626
    i never pulled the dizzy
    03 yukon xl:intake, longtubes ory,performabuilt lvl2,circle D 278,tune, tint, lt1 fans
    92 z28: lb9 air foil vette servo magnaflow catback adjustable pan hard rod Lcas lcarbs
    86 trans am: lm7 hot cam th350 3500 stall

  7. #7
    Join Date
    May 2008
    Location
    Round Rock, TX
    Posts
    3,069
    Make sure the firing order is going the correct way on the dist. You could have the wires going the wrong way...

  8. #8
    Join Date
    Dec 2007
    Location
    College Station, TX
    Posts
    1,464
    yeah its gotta be the wires

  9. #9
    Join Date
    May 2008
    Location
    verona, virgina
    Posts
    626
    I believe its something in the wires too. The po that had it replaced the intake gasket at one time and i know that the dizzy was turned more towards the carb than it should be im thinking that maybe its a little off and that he had the wires moved onto diffrent posts for it to work correctly. Any that ive ever done the 8 and 1 wire are the front two on the dizzy and thats the way i reconected them. Im gona go back through tomarrow and move all the wires over one post each way and see if it starts if not ill pull the dizzy and start over. While ive got it out it will be a good chance for me to go ahead and replace the leaky intake gaskets.
    03 yukon xl:intake, longtubes ory,performabuilt lvl2,circle D 278,tune, tint, lt1 fans
    92 z28: lb9 air foil vette servo magnaflow catback adjustable pan hard rod Lcas lcarbs
    86 trans am: lm7 hot cam th350 3500 stall

  10. #10
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    pull the spark plugs and crank it. Sounds like you hydraulic locked your engine with fuel or something else possibly.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

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