General Category > Quadrajet Carb Talk and Tips

17056264 carb issue.

(1/2) > >>

DeCaff2007:
Ok here's my issue.  Bought carb off ebay, cliffs SP kit, and rebuilt it to the letter using cliffs book.  Wasn't too awfully difficult, but it gave me some grief..  Even though I had ZERO parts left over, I'm pretty sure I'm missing something.  Hot air choke for one, the linkage that connects the hot air choke to the primaries, and I just might have missed something in the rebuild.

So, that said, I bolted my carb to my 76 Trans Am, gave the throttle linkage a few pumps, and definitely saw fuel spraying into the bowl.  Good.  So I turned the key and it will crank but won't start.  I have spark, timing is dead on, but then I held the throttle plate open and watched the fuel drain to the intake manifold.  Turned the key and it fired right up... for about 2 seconds, and died.

So wash, rinse, repeat... why is the carb not allowing fuel through to the intake? 

Any thoughts before I tear this apart again and make a bigger mess?

Ethan1:

--- Quote from: DeCaff2007 on December 31, 2016, 01:03:42 PM ---Ok here's my issue.  Bought carb off ebay, cliffs SP kit, and rebuilt it to the letter using cliffs book.  Wasn't too awfully difficult, but it gave me some grief..  Even though I had ZERO parts left over, I'm pretty sure I'm missing something.  Hot air choke for one, the linkage that connects the hot air choke to the primaries, and I just might have missed something in the rebuild.

So, that said, I bolted my carb to my 76 Trans Am, gave the throttle linkage a few pumps, and definitely saw fuel spraying into the bowl.  Good.  So I turned the key and it will crank but won't start.  I have spark, timing is dead on, but then I held the throttle plate open and watched the fuel drain to the intake manifold.  Turned the key and it fired right up... for about 2 seconds, and died.

So wash, rinse, repeat... why is the carb not allowing fuel through to the intake? 

Any thoughts before I tear this apart again and make a bigger mess?

--- End quote ---

 Where is your idle mixture screws set at? Idle speed screw set at?

qjetsrule:
if the choke opens too far and the engine is cold it will die also. good luck

omaha:
...is it possible that the choke is closing all the way because of the missing linkage. If the choke does not open at all, it will kill the engine. Make sure the choke is open at least somewhat. {wire it open etc.} It should run if it is cold even if you have to modulate the pedal. Usually the choke pulloff will open it enough but if is not adjusted correctly or inoperative you will have problems. Other than that, if the choke is opening, then the idle supply is being blocked. cold weather will kill the engine also but it seems like if you could keep it running at least by pumping the pedal a bit til it gets some heat into it you should at least get it to high idle with a high idle setting. So double check throttle opening adjustment and ,idle screw adjustment, {depends on what screws you have, regular or fine thread}sometimes the fine thread screws will need to be turned quite a few turns before you will get a good idle, and make sure the choke is open at least 3/16 to 1/4 while its trying to start. Happy New Year!!!

Ethan1:
 And, yes, it is VERY easy to forget parts on these carburetors once there together. I sometimes even have my problems! :o

Navigation

[0] Message Index

[#] Next page