for 350 buick wondering why they are rebuilt so crappy and what is everything i need to do to make it run good... it runs good when its warm but its rough the whole time unless i give gas, don't know nothing is set i need to set the idle mixture and the idle, then the timing i guess i need the exact order of what i need to do and pictures for all the vacuum lines so i know what goes to what i have extra lines that aren't plugged with no where to know why is this?
If you don't already have these you will need: timing light tach vacuum gauge Read the powertiming thread in the FAQ section, and set timing first. Since you want to get the motor running right let me clue you in on what it takes. Timing is very important and must be close to right before the carb can be set up. You'll need to adjust the idle mixture on the carb to get the proper air/fuel ratio at idle. I use a electronic measuring device called an LM-1 to measure this ratio but you can use a vacuum gauge, rpm gauge and some tinkering to set it up. Reading the spark plugs is a really good way to see how the mixture is. Set the idle mixture screws on the bottom front of the carb to get highest vacuum readings (and smoothest idle) with the wheels blocked, vacuum advance plugged, at the rpm at the spec. for that year and motor. I can elaborate if you need..... Have you set the timing yet? If not, do that first Check total timing as well as the intitial using a dial back timing light. These Buick motors like 14 degrees intial, 20 degrees of mechanical advance, and 8 degrees of vac advance on top of that. The vac advance disapears under high load and leaves the 34 which is best for performance. I had to do some work to the dist to get this setting though: I used MR Gasket bushings to limit the mechanical advance from about 30 to 20. This allows more initial timing which makes it run better without any detonation (ping) once the timing is all in as rpm climbs. I use lighter springs for the mech. advance from a Crane cams vacuum advance kit for a chevy 350 (it works on all buick, pontiac ect as well) Kit includes springs to let the timing come in earlier than stock which helps performance and economy as well as an adjustable vac advance canister (which I've limited to 8 degrees to eliminate detonation (ping) on light throttle.
