i have a 84 camaro computer controlled q-jet 4 barrel carb.

new fuel pump new fuel line new filter.

car wont start unless i dump gas down the throught of the carb

if i pull up on accelertor cable i can see gas going in the front 2 bowls



there is a 3 prong plug that goes to something on the front

and a 2 prong plug going to something on top of carb ? one of these 2 bad or not getting power?

could i have a bad accelerator pump?

car runs if i dump gas down it untill it runs out

its driving me insane

thx for any info

 

3 prong plug goes to the Throttle Position Sensor (TPS) on the front/driver's side of the carb. 2 prong plug goes to the Mixture Control Solenoid plug on the top/passenger side of the carb. It might run badly if they aren't working right, but it should still fire up when you turn the key. ECM doesn't pay much attention to them until after the motor starts.

If you're seeing fuel squirting out two little needle-sized streams into both front (primary) venturis when you stroke the throttle, that means you've got fuel in the bowl and the accelerator pump system is working at least.

So, if you dribble some gas down the throat of the carb it runs temporarily but then dies? Do I have that right? Will it eventually stay running on it's own or will it always die out? My first thought is that it's tough to start one of these things on a cold day without a working choke (don't know if yours is or not). But even if it's not, the motor should eventually stay running on it's own. If that never happens you might be looking at just dirt clogging up various passages inside the carb, or something like that. Not sure. Doesn't sound like just a choke problem- I suspect there's more going on that that.

Oh, and don't forget the old rule- 90% of all carburetor problems are found in the ignition system!

 

So, if you dribble some gas down the throat of the carb it runs temporarily but then dies? Do I have that right?yes after gas that has been poured in runs out motor dies.



Oh, and don't forget the old rule- 90% of all carburetor problems are found in the ignition system!???????? like bad or soaked plugs?
thx a million

 

Fuel pump or fuel filter?

Try carefully filling the bowls of the carb through the vents to see if it will idle. Should run a minute or 2 on fuel in the bowl. If not the carb needs to be opened.

 

After You Get It Running On The Fuel Your Poured Down The Carb,Can You See Fuel Squirting Down Into The Carb When You Open The Throttle Linkage.

 

i think i figured it out its the plunger accelertor pump .with linkage hooked up if i tryed to pull it up only like a half a squirt of fuel would go in like very little .unhooked linkage /rod that goes to plunger and if i pushed plunger all the way down i would get a real good stream of fuel .when linkage hooked up wouldnt push it down far enough so i guess the spring and mechanisim is shot.can i get a rebuild kit with a new plunger any links on a rebuild kit ?thx

 

You Can Try Here.

http://quadrajetparts.com/