Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

Won't Start!

Discussion in 'The Garage' started by K10bolts, Feb 8, 2005.

  1. K10bolts

    K10bolts Registered Member

    Joined:
    Feb 8, 2005
    Posts:
    35
    Likes Received:
    0
    Location:
    Big Rapids, Michigan
    Hey guys. I recently made some changes to my 83' K10 350, and now she won't start. When cranked, it will try to fire and very occasionally barely run for less than a second and then die. It sounds like it is only firing on a couple of cylinders. It doesnt backfire either. The only changes I made were rebuilt my carb, and swapped out the intake for a stock aluminum one from a 350. I'm sure it's not a timing problem, I have checked it a million times. The distributor looks to be in good shape. I borrowed a friends carb and it does the same thing, so it's not the carb. I originally suspected a vac. leak, but can't use the ether trick without it running. Any thoughts would be appreciated as I have been working on this for weeks.:confused:
     
  2. spearchucker

    spearchucker 1/2 ton status

    Joined:
    Nov 17, 2003
    Posts:
    1,556
    Likes Received:
    0
    Location:
    Bay area, CA
    My guess is that the distributor may need to be turned 180*.
     
  3. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

    Joined:
    Aug 28, 2002
    Posts:
    9,097
    Likes Received:
    144
    Location:
    california
    I think you have a spark problem. I would second the 180* turn on the distributer and check to make sure all the wires are in the correct firing order.


    P.S. On what did you find a stock aluminum intake manifold?
     
  4. pauly383

    pauly383 Daddy383 Staff Member Moderator

    Joined:
    Jul 22, 2001
    Posts:
    16,217
    Likes Received:
    1
    Location:
    Mesa , Arizona USA
    First things first , double check for TDC on #1 on firing stroke , see where the rotor points , and do the wires 1-8-4-3-6-5-7-2 . After that make sure all the connections are solid and good . Then pull a plug and hold it to ground with a wire on it and see if it sparks , maybe a good time to replace them since they are cheap . If you have spark and wiring correct , look to make sure you have gas :k5: :k5:
     
  5. K10bolts

    K10bolts Registered Member

    Joined:
    Feb 8, 2005
    Posts:
    35
    Likes Received:
    0
    Location:
    Big Rapids, Michigan
    Thank's guys. I have already checked that it isnt 180* and pulled a plug and checked for spark. I'm shure the wires are in the right order too.
     
  6. K10bolts

    K10bolts Registered Member

    Joined:
    Feb 8, 2005
    Posts:
    35
    Likes Received:
    0
    Location:
    Big Rapids, Michigan
    Oh, and I have already replaced the plugs and wires. The replacement manifold is just a stock aluminum one from a friends 1978 K10.
     
  7. Can Can

    Can Can Pusher Man Staff Member Super Moderator

    Joined:
    Feb 17, 2000
    Posts:
    15,552
    Likes Received:
    136
    Location:
    Cochrane, Alberta, Canada
    You have gas for sure?????
     
  8. rjfguitar

    rjfguitar 3/4 ton status GMOTM Winner

    Joined:
    Aug 28, 2002
    Posts:
    9,097
    Likes Received:
    144
    Location:
    california
    That must be an aftermarket intake because I do't think tock engines inthe late 70's got alum intakes.
     
  9. K10bolts

    K10bolts Registered Member

    Joined:
    Feb 8, 2005
    Posts:
    35
    Likes Received:
    0
    Location:
    Big Rapids, Michigan
    I do have fresh gas and strong spark. I'm pretty sure It's a factory manifold. It has the cylinder #'s and the firing order stamped on it.
     
  10. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,980
    Likes Received:
    189
    Location:
    Roy WA
    Dunno about 350's, but Monte's in the 80's with 305's could/did have AL intakes. Probably the same thing later on with Caprices, Camaro's and so on that had 350's.
     
  11. Fierospeeder

    Fierospeeder Banned

    Joined:
    Sep 17, 2001
    Posts:
    315
    Likes Received:
    0
    Location:
    Illinois
    if you crank it, you should get about 3-5hg of vac. If you have a vacuum gauge handy.

    you trying pouring some fuel down the carb? Dont stand near it while its cranking.
     
  12. K10bolts

    K10bolts Registered Member

    Joined:
    Feb 8, 2005
    Posts:
    35
    Likes Received:
    0
    Location:
    Big Rapids, Michigan
    I put a vac. gauge on it earlier. It read 2hg with the throttle closed when cranked. I tried giving it a shot of gas with no difference. It is definatly pulling fuel.:confused:
     
  13. zeroz400

    zeroz400 1/2 ton status

    Joined:
    May 30, 2004
    Posts:
    410
    Likes Received:
    0
    Location:
    Libertyville, IL
    His timing is definetly on. Im letting him use my vac gauge, its also a fuel pressure gauge so we could try that too. The plugs and wires are new, there is definetly some pressure coming from the fuel pump too. I think theres a vaccuum leak or he has poor compression, were gonna get some more people over and see if we can diagnose the problem on friday. Ill prolly bring my other distrbitor over cuz his vaccuum advanced doesnt work, we'll see how it goes.


    Later
     
  14. dyeager535

    dyeager535 1 ton status Premium Member

    Joined:
    Dec 13, 2000
    Posts:
    26,980
    Likes Received:
    189
    Location:
    Roy WA
    If the vac advance doesn't work, does that mean its leaking, and thus is a vacuum leak?

    Shouldn't be enough so that it won't start, but can't help if it is a problem.
     
  15. zeroz400

    zeroz400 1/2 ton status

    Joined:
    May 30, 2004
    Posts:
    410
    Likes Received:
    0
    Location:
    Libertyville, IL
    Well the auto teacher from our school went to his house today. They rechecked the timing and he said it was cranking to slow and that the timing needs to be adjusted just a tiny bit. I brought my big battery charger over, put it on high and she finally fired up! It wasnt running to great but it ran for a long enough time for us to get the timing squared up. We need to do a starter draw test on it too, the voltage drop was high so he may be replacing the starter sometime soon.


    Later
     
  16. K10bolts

    K10bolts Registered Member

    Joined:
    Feb 8, 2005
    Posts:
    35
    Likes Received:
    0
    Location:
    Big Rapids, Michigan
    Yep. I got it fixed. The starter wasn't cranking it fast enough to start. My timing was just a few degrees off. It only took me 3.5 months to figure it out. It's 'bout time to celebrate with a cold one. Thank's for all your posts guys.:D
     
  17. ssls6

    ssls6 Registered Member

    Joined:
    Jan 5, 2005
    Posts:
    86
    Likes Received:
    0
    Location:
    Dallas, TX
    Sounds like the timing is off to me. Try advancing the timing 20+ degrees.
     
  18. spearchucker

    spearchucker 1/2 ton status

    Joined:
    Nov 17, 2003
    Posts:
    1,556
    Likes Received:
    0
    Location:
    Bay area, CA
    If there's a voltage drop between the battery and starter you may need to replace that cable. It may have internal corrosion causing the drop.
     
  19. kris4real

    kris4real Registered Member

    Joined:
    Apr 14, 2003
    Posts:
    13
    Likes Received:
    0
    Location:
    California
    Been there, done that

    Man... I am searching this forum for help on this very same issue. 76 K5 didn't start one day out of the blue.

    Dropped a new mallory distributor & HEI Ignition, went through all the wiring, firing order, TDC zero'd, checked exhaust vs intake stroke, checked rotor position - Battery is fine - new Eidelbrach carb, fuel is not an issue - checked for spark - now thinking about the arc spring in the iginition itself, anyway to screw that up? Maybe it needs more goo? Checked for timing by turning it over and adjusting the rotation.....

    ANY MORE IDEAS????? HEEEELLLPPP. My friends said rocker arm is bad - time for a new engine????

    thanks.

    Kris4real
     
  20. K10bolts

    K10bolts Registered Member

    Joined:
    Feb 8, 2005
    Posts:
    35
    Likes Received:
    0
    Location:
    Big Rapids, Michigan
    Kris- Try throwing a timing light on it while cranking to see how close your timing is. Have you tried pouring some gas down the carb? Check to see that your choke is closing properly and your plugs aint fouled.
     

Share This Page