1987 with a 305. Quad-jet 4bbl on top. Put a kit in it and cleaned it up. It was filthy. Got it back on and runs good for a few minutes. Then it will not speed up very good. Take the air filter off and runs alot better, but not great. Now I looked down throttle body and see that one side I can see fuel dripping and swirling around below the jet. The other side looks clean. So what's my problem?

 

maybe you messed up the rebuild...make sure all the lines are in the proper locations

 

take the carb off again and seperate the base plate from the carb body. turn over the carb body and between the front two barraels towards the back of the carb are two v shaped pipes that stick out with little aluminum caps on them. they fit into a machined area in the base plate kinda looks like a pentagon...These tubes feed fuel to the ventures in each of the front barrells. Air passing thru the venturis and sucks the fuel out of the fuel bowl, up these tubes then into the air stream. if the caps leak, then they don't get fuel..

in the kit they should have given you a similaly shaped soft rubber piece of foam. if you didn't put it inthere then probably those alum caps are leaking. a common problem with the q jet. a lot of folks clean that area off with a brass brush and apply JB weld to seal those tubes.

Additionally beign an 87 which is the electronic version, further complicates things...

take a look at http://www.tocmp.com/manuals/Carbs/R...QJet/index.htm keep in mind this is for a older version, but the theory is still relatively the same...

Vacum leaks, the incorrect base plate gasket, using the incorrect gaskets supplied in the kit etc can also contribute to the problem...

If you kept the old gaskets, compare then to the ones you used and make sure they look the same..some that look the same my have only very small differencess in the placement of one hole and it will screw things up..

Rochesters are good carbs, very tunable, but also complicated and difficult sometimes to work with.

Greg