Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem

Hard starting Buick 455

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omaha:
that is kinda strange. the only other thing I can think of would be the needle and seat sticking and maybe a weak fuel pump. but why just when its cold? I'd like to keep posted on this, ....interesting....

Buicknutty:
I replaced the fuel pump with a new one, the correct one for the engine, and I am running it from a remote tank as the gas tank on the car has about a 3/4 tank of 20 yr. old gas in it. I haven't put a fuel pressure gauge though.
Keith

Cliff Ruggles:
More than likely several problems exist.  Leaking bottom plugs (all pre-1969 carburetors will leak at the bottom plugs, even with JB Weld dabbed over them.

Choke pull-off unloading the choke flap too far on cold starts.

I would suggest getting our book, complete HP rebuild kit, and shaft bushing install kit.  A complete/correct rebuild with upgraded/Viton parts will cure the issues.....Cliff

Buicknutty:
Cliff;
Thanks, I bought your book a while ago, and I have ordered some parts from you, and am looking forward to getting them.
Keith

Buicknutty:
Well,its' been a while, but I finally got back to the Q-jet on the Wildcat. I had bought virtually everything that Cliff offered for parts on this beast, but got sidetracked with other things. So, I've now done a complete rebuild, and it had lots issues. The throttle shafts were very badly worn, lots and lots of gunk inside, with a few ports completely plugged up, so after going through it all, it has been a success.
 Now all is well, and it starts and runs beautifully!
Thanks to Cliff for the parts and advice!
Keith aka Buicknutty.

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