General Category > Quadrajet Carb Talk and Tips
no control of idle mixture screws
Cliff Ruggles:
The 17058253 has two pairs of main air bleeds.
The upper idle air bleeds are just above the DCR's, the second pair in the main casting just above the transfer slots.
Those are excellent carburetors. Sounds like yours just needs a bit more idle fuel to the mixture screws for that engine/cam combination.....Cliff
1bad79:
Thanks for the quick reply I will try to add some fuel then thanks steve
1bad79:
I went to .054 on the down channel restriction and .095 on the mix screws vacuum steadied out a lot but still to fast with the plates shut im thinking about resizing the bypass air slightly smaller,not sure if going to get back to it this week, busy at work so if there are any other ideas feel free to post thanks steve
1bad79:
I got to work with it some tonight I went back to timing I set it at 12 degrees and went back to ported vacuum played with the mix screws and got it idling pretty well.I have different plugs coming I'm sure the heat range is to high. I noticed a off idle kinda chug or stumble until about 1700 rpms but that might be the plugs but I still have a wildly fluctuating vacuum gauge so I pulled the plugs and used my leak down detector to check all the cylinders thinking the valves might be hanging open but I found all cylinders had no dectable leak so after I get the new plugs I'm going to try a different gauge and re check of vacuum leaks
1bad79:
so I have tried everything I can timing wise no vac leaks seems good off idle and up but wont idle for crap. ive got a few holleys around im going to try one out and see if it makes a difference thanks for the help steve
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version