carb help on new to me suburban

[stretch86]

The thing that puzzles me is the old plugs were a good tanish color

[stretch86]

My uncle has a new quadrajet that was for a 86 cutless with a 307 would that fit work on my truck

[Irish_Alley]

start by double checking your firing order and use a timing light and see what ° your timing is at.

[stretch86]

I had a guy come over today and help me with carb determined old carb was junk so put on another one that had gotten with truck. Theres a vacuum port on choke housing where does it go cause it fired up before drove it around then let it sit for a couple of hours and wouldnt start. Ended up opening chokes plate and it fired right up its like it was giving it to much choke and engine was still lil warm. I can post pics later  if needed.

[stretch86]

Also the engine ran great best that ive heard it run and throttle was very responsive no hessitation or anything

[Greybeard]

I agree with the pros here, make certain the electrics work right first, then check for vacuum leaks, last would be the carb. Otherwise, you are chasing your tail.

[Stewart G Griffin]

Also the cutlass carb won't work very well on the truck because it's computer controlled.

[Greybeard]

And even though this thread is likely starting to rot it's been dead so long, I want to say I totally agree with what Stewart said. I had an 85 Blazer with the electric Rochester, I did the ignorant stuff to it, unhooked all the smog crap including the electrical connecter to the carb. The truck ran, but it ran like crap. It was a 305. It went from helpless to pointless. I unloaded the truck after that it was so rusted out and the tailgate wouldn't open. The new owner put a Holley on it and cut the tailgate off and ran it for a few years more until the body literally fell off the frame. 

[stretch86]

Eventualy i wanna get different motor for the body isnt that bad for being 30 years in nh and the frames in great shape. Ive capped off vac ports on carb and it does run great good throttle but its diffucult to start at times especially when trucks warm ive also added a manual choke to it as the auto choke kept acting up. My plan is to get a vortec 350 with a nv4500. Build the vortec up a lil bit and fix body with new panels. I also understand the difficulties thats gonna come with adding the nv4500 but thankfuly i found a write up some one did for there 89 3/4 suburban. All in all theres a lot ive gotta do to it and gonna do lil at a time when money and time permits me to.

[stretch86]

http://67-72chevytrucks.com/vboard/showthread.php?t=610659 heres the nv4500 write up

[rich weyand]

It would help a lot if you put the original-style air cleaner back on and got rid of the two-chrome-pie-plates nonsense.

[stretch86]

Cant dont have it and im having a heck of a time finding a rear end for it

[Stewart G Griffin]

What's your start up procedure?

[stretch86]

When its cold ill pump it couple of times and pull choke when its warm i forgot what i did cause its been couple months since driven it cause of rear end

[hatzie]

I always pushed the throttle to the floor twice to prime the intake and set the throttle on the high idle cam. Then I cranked it over.  She always kicked right off.
If you have an electronic feedback carb you want to keep all of the smog crap hooked up including the original air cleaner.  To dump the smog stuff you need an earlier carb and intake. It'll run like garbage otherwise.

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