Quadrajet Always Causing Me A Rough Start?

[Jae77]

I have a rebuilt quadrajet with manual choke*do they come with electronic*? i have a rough time starting my truck after it hasn't run for a few hours and i believe it's all due to the carb.

 

My 350 has been rebuilt from the bottom up . ported and polished. and only has 20,000 km's on it. The ppl who did the rebuild did a very good job on it i've been told. haha i'm not a mech but i have the papers for the engine

 

The is new to me *again* as it's been stored at my old mans place for 5 yrs. It was started every 2 weeks and run for awhile and consistan oil changes while being stored.

 

After owning vehicles with Fuel injection i knew it would take me a bit to get used to firing up my truck but i've had it for over a month and can't seem to figure it out. I've had a mech look at my carb *experienced with carbs* and he didn't notice anything *the truck was running for a good 30 mins before i got to his place*

 

it usually takes me 3-4 starts before it keeps running.. and it runs rough for another good 2-3 mins while i warm it up.. when i try with the choke on it almost seems like it's getting to much gas and dies everytime..

 

i've tried the 3 pump on the gas before firing her up and that seems to work sometimes.....

 

any advice would be appreciated... should i dump the Quadrajet and get a diff carb?? or rebuild the Quadrajet

[txab]

If it hasn't been rebuilt recently then it indeed may need a kit and then perform all of the setup adjustments. I've got a Q-jet on a 350 and all it takes for the first cold start of the day is one pump of the pedal to set the choke and provide a little prime via the accelerator pump plunger. She'll catch the first crank.

 

A clean properly adjusted carb is a happy carb.

 

A different carb is definitely an option as well

[Doug_Scott]

Put the automatic choke back on. Rebuild the carb, replace the choke pull off when you do it as well (chances are that is why they pulled the auto choke off of it in the first place). That carb is easy to rebuild, and adjust.

[grampadirt]

I was having probs with my '77 GMC (454/TH400)years ago too.After taking it to a supposedly competent rebuilder and still not working right I decided a new carb was in order.I bought a new Edelbrock copy of a Q-Jet for just above $400.00,the best $ I ever spent on the truck.Since the first start-up and until my son totaled the truck it took one pump of the gas pedal to start cold,run great while it was warming up,and settle down to a nice idle.I'm not sure if you want to go that route but it was worth it for me...couple of pics(I'm gonna be putting it on my RV's 454 soon)

 

 

Hope this helps

[Jae77]

Thanks

i was checking out a Holley at O'Reily's when i was across the boarder the other night

is $450 a good price for a 670 CFM 4 barrel Truck Street avenger? *i think that was what it was*