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Thread: Need Serious help, no spark after backfire
          
   
   

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  1. #1
    keithcooper is offline CHR Junior sMember Visit my Photo Gallery
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    Need Serious help, no spark after backfire

     



    Hey folks, I have a 5.7 small block and I ran out of gas, upon trying to get it started to at least get out of traffic the engine backfired loudly and I had to push it. I put 3 gals of gas in, and a small amount in the carb...no start. Tried everything I could think of and ended up towing it home. I learned that I was getting fuel but no spark, I replaced the cap and rotor after realizing they were toast, still no start, replaced the ignition module and still nothing any ideas?

  2. #2
    34_40's Avatar
    34_40 is offline CHR Member Visit my Photo Gallery
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    Did you check for power to the distributor? I'm assuming it's a small block chevrolet of some year... probably HEI since you mentioned a module.. And if it's a late model, there's probably at least 2 fuses that protect the engine control (and possibly a fusible link)...

    But I'm no Carnack the Magician as seen on Johnny Carsons' Tonite Show... (let's see if you remember that one?!?!)

    Oh, and welcome to Club Hot Rod!

  3. #3
    rspears's Avatar
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    Sounds to me like you had a sudden ignition failure that led to the backfire, not that the backfire caused this problem. Like Mike says, you need to start from scratch on your ignition system, check for power, and check all of your fuses - a cheap probe type test light can check fuse status pretty fast using the little test port holes atop each fuse, power to the fuse, and power through the fuse with two touches. And welcome to CHR! Tell us more about this 5.7L if more questions - what's it in, what year, carb or injected, ignition type, etc.
    Roger
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

  4. #4
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    There's not much to the HEI on a sbc. Hot wire to ignition sw. Do you have power to the dist.? Check coil? When it backfired did it put you out of time?? OH yes Welcome to CHR
    Charlie
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  5. #5
    jerry clayton's Avatar
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    Maybe instead of running out of gas , the timing chain/gear failed------------Check fr rotor rotation and if it points to #1 or 36 at the tdc mark on the dampner

  6. #6
    rspears's Avatar
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    Quote Originally Posted by jerry clayton View Post
    Maybe instead of running out of gas , the timing chain/gear failed------------Check fr rotor rotation and if it points to #1 or 36 at the tdc mark on the dampner
    That's #1 or #6 with the timing mark at TDC on the dampner depending on which stroke #1 is on, compression or exhaust. That's a good tip, Jerry.
    Roger
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

  7. #7
    34_40's Avatar
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    I think Jerry scared him off!

  8. #8
    rspears's Avatar
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    Quote Originally Posted by 34_40 View Post
    I think Jerry scared him off!
    Or he was looking for instant gratification Posted at 8:30pm, waited an hour for an answer, and hasn't been back yet, or at least hasn't logged on. Maybe he'll drop in again and let us know what he found his problem to be.
    Roger
    Enjoy the little things in life, and you may look back one day and realize that they were really the BIG things.

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