Welcome to Club Hot Rod!  The premier site for everything to do with Hot Rod, Customs, Low Riders, Rat Rods, and more. 

  •  » Members from all over the US and the world!
  •  » Help from all over the world for your questions
  •  » Build logs for you and all members
  •  » Blogs
  •  » Image Gallery
  •  » Many thousands of members and hundreds of thousands of posts! 

YES! I want to register an account for free right now!  p.s.: For registered members this ad will NOT show

 

Thread: sbc running rough
          
   
   

Reply To Thread
Page 3 of 4 FirstFirst 1 2 3 4 LastLast
Results 31 to 45 of 49
  1. #31
    mikey87290's Avatar
    mikey87290 is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2007
    Location
    westland
    Car Year, Make, Model: 94 s-10 blazer 4x4 sbc 383 350 trans
    Posts
    31

    what i mean was they are closed when it is on the 0* mark..sorry..but were the mark is when it is running the valve would be open some.
    I know there is no offset key in there..

    Do you think it is cuz its too rich??
    Maybe need some hotter plugs.

    I just don't want to pull the front cover off.I don't feel like pulling apart the whole front of the motor apart..Its not easy being in a s-10 blazer you kow..
    Last edited by mikey87290; 01-11-2007 at 09:56 AM.

  2. #32
    cffisher's Avatar
    cffisher is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2006
    Location
    Constantine
    Car Year, Make, Model: 57 chevy 2 dr wagon
    Posts
    9,476

    When you cleaned the plugs what did they look like black white gray???
    Charlie
    Lovin' what I do and doing what I love
    Some guys can fix broken NO ONE can fix STUPID
    W8AMR
    http://fishertrains94.webs.com/
    Christian in training

  3. #33
    mikey87290's Avatar
    mikey87290 is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2007
    Location
    westland
    Car Year, Make, Model: 94 s-10 blazer 4x4 sbc 383 350 trans
    Posts
    31

    black dry carbon

  4. #34
    cffisher's Avatar
    cffisher is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2006
    Location
    Constantine
    Car Year, Make, Model: 57 chevy 2 dr wagon
    Posts
    9,476

    That sounds rich OR sucking oil from somewhere. maybe PCV stuck?? Did you use a sealer when you set the intake??
    Charlie
    Lovin' what I do and doing what I love
    Some guys can fix broken NO ONE can fix STUPID
    W8AMR
    http://fishertrains94.webs.com/
    Christian in training

  5. #35
    mikey87290's Avatar
    mikey87290 is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2007
    Location
    westland
    Car Year, Make, Model: 94 s-10 blazer 4x4 sbc 383 350 trans
    Posts
    31

    i used sealer on the ends of the intake.and i have no pcv.
    i know it burn a little bit of oil but not that mush in all the cly's

  6. #36
    mikey87290's Avatar
    mikey87290 is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2007
    Location
    westland
    Car Year, Make, Model: 94 s-10 blazer 4x4 sbc 383 350 trans
    Posts
    31

    ok i figrure out the timming mark thing.me being dumb on that part.the idle was way up.but it did not same like it was.but still runing bad rough idle and fall's on its face when open the thottle quick..I had to stop for the night do to the noise and being smoked out of the garage..I did change the plugs to a stock range and size.not easy.

  7. #37
    skids72's Avatar
    skids72 is offline CHR Member Visit my Photo Gallery
    Join Date
    Dec 2005
    Location
    Lafayette
    Car Year, Make, Model: 68 Firebird 439 BBC
    Posts
    745

    Just a thought... maybe idle circuit too rich (fouled plugs lots of advance at idle) but main circuit/transfer slot too lean (knock and bog)? You mentioned you're running the smallest jets you could find. I'm not an expert but maybe an approach like:

    1) set timing to ~8-10* at idle (should be ~35* all in ~2500 rpm)
    2) adjust idle mix and idle speed for max vacuum at xxx rpm (800?)
    3) start increasing main/secondary jet size until it runs right

    maybe have a stuck power valve?

    As I said, I'm not an expert so take this with a grain of salt and maybe better suggestions....

    Good luck,

    Chris

  8. #38
    NTFDAY's Avatar
    NTFDAY is offline CHR Member Visit my Photo Gallery
    Join Date
    Aug 2003
    Location
    Springfield
    Car Year, Make, Model: '66 Mustang, 76 Corvette
    Posts
    5,205

    If the carb set on the shelf for two years with any amount of gas in it, I'd say you need to rebuild it. The metering block is probably full of varnish.
    Ken Thomas
    NoT FaDe AwaY and the music didn't die
    The simplest road is usually the last one sought
    Wild Willie & AA/FA's The greatest show in drag racing

  9. #39
    mikey87290's Avatar
    mikey87290 is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2007
    Location
    westland
    Car Year, Make, Model: 94 s-10 blazer 4x4 sbc 383 350 trans
    Posts
    31

    well i did clean the carb when i put it on the truck.
    i got it running the best sofar today but still no powerwill taking off from the stop sign...The timimng mark on the blance must be off becuz the it is still at like 30-60 deg...i get it any were close to were it should be it will not run.
    i just change the carb to a 390 cfm 4bbl and still to rich..Maybe i have a bad cly..I not able to check the compresson in the back 4 cly becuz of the headers being in the way.i think i need to find a way check them..pull the header or some thing...

    Well i think i will start the tear down tonite.Pull the whole front so i can see the chain and pull the headers to check the cly's..and i will try to find a way to check the blancer and go from there
    Last edited by mikey87290; 01-12-2007 at 02:04 PM.

  10. #40
    cffisher's Avatar
    cffisher is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2006
    Location
    Constantine
    Car Year, Make, Model: 57 chevy 2 dr wagon
    Posts
    9,476

    Hope your inside its going to get WINTER out
    Charlie
    Lovin' what I do and doing what I love
    Some guys can fix broken NO ONE can fix STUPID
    W8AMR
    http://fishertrains94.webs.com/
    Christian in training

  11. #41
    mikey87290's Avatar
    mikey87290 is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2007
    Location
    westland
    Car Year, Make, Model: 94 s-10 blazer 4x4 sbc 383 350 trans
    Posts
    31

    yes i am..just need some gas and good to go

  12. #42
    mikey87290's Avatar
    mikey87290 is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2007
    Location
    westland
    Car Year, Make, Model: 94 s-10 blazer 4x4 sbc 383 350 trans
    Posts
    31

    ok i have compression test all cly's and they are 120-135psi.The chain is dead on.
    The eninge is still runing rich on all cly's.
    Still the timming mark is around 40-50* btdc with no vac to the dis..????

  13. #43
    cffisher's Avatar
    cffisher is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2006
    Location
    Constantine
    Car Year, Make, Model: 57 chevy 2 dr wagon
    Posts
    9,476

    You said you changed the damper. Are you aware there is more than one damper for sbc that have the timing mark in different locations.
    Charlie
    Lovin' what I do and doing what I love
    Some guys can fix broken NO ONE can fix STUPID
    W8AMR
    http://fishertrains94.webs.com/
    Christian in training

  14. #44
    mikey87290's Avatar
    mikey87290 is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2007
    Location
    westland
    Car Year, Make, Model: 94 s-10 blazer 4x4 sbc 383 350 trans
    Posts
    31

    yes i found that out a while ago..I think i have the one that came with the motor and they lined up in the same spot..I'm going to pull the intake off and check the gasket.Some one left me a comment that the gasket could not be sealing on the bottom side.but it said about it runing lean but i should check it anyways.

  15. #45
    mikey87290's Avatar
    mikey87290 is offline CHR Member Visit my Photo Gallery
    Join Date
    Jan 2007
    Location
    westland
    Car Year, Make, Model: 94 s-10 blazer 4x4 sbc 383 350 trans
    Posts
    31

    will i do not know what i did but it stop running so rich..I readjust all the valves and rebuild the carb and it was running great then the oil pump die.
    So now i need a new engine.

Reply To Thread
Page 3 of 4 FirstFirst 1 2 3 4 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Links monetized by VigLink