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On a 69 Pontiac GTO does the vacuum for distributor come from above or below the throttle plates?
Wiki User
∙ 13y ago
your vacuum advance should hook to the outlet on the carb that sucks when you rev the engine, not to one that sucks at a idle.
On pre HEI cars, the vacuum advance actually hooked up to vacuum at idle. Below the throttle plates.
There is a fitting called a " intake vacuum fitting" which is used on the ram air model and on the basic model that when used it will provide stronger faster vacuum, be ready for a big change in off the line performance, but rougher idling.
Wiki User
∙ 13y ago
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Where is the transmission modulator hose connected to at the motor?
A manifold vacuum source, anywhere below the throttle plates.
How do you hook up the vacuum hoses on a distributor to carburetor?
If it is a point type distributor you will want to hook it to constant vacuum...somewhere on a port in the base plate. If it's HEI you'll want to hook it to one in the carb body. Something that has no vacuum at idle but pulls vacuum as you give it throttle.
Vacuum advance hook up on 63 Chevy 283 engine?
There should be a vacuum source on the carb above the throttle body that gives spark ported vacuum. You can connect a tube from this source to the distributor.
How do you replace the vacuum advance on a 1970 Pontiac V8?
Remove the distributor cap. Remove the hose to the vacuum advance. Remove the two screws holding the vacuum advance on. Install in reverse order.
1974 Chevy 350 vacuum line diagram?
You'd need a constant source such as manifold or throttle body vacuum for power brakes, pcv, and disappearing headlights, and a spark-ported source such as one you'd find above the throttle body for the distributor.
96 Chevy Pontiac grand am high reving?
Perhaps throttle plate is stuck open. try to "free " with a screwdriver or perhaps a vacuum leak
What are common causes of high idle on 1995 S-10 blazer with 4.3?
If the throttle plates are closed, a vacuum leak would be the prime suspect.
Where is the vacuum in port injection?
With a fuel port injection OR throttle body injection engine, the engine develops a partial vacuum between the throttle assembly and the intake valves. Note that there is never a true vacuum in ANY engine, and when the throttle is wide open, there is very little vacuum.
Where is vacuum in port injection?
With a fuel port injection OR throttle body injection engine, the engine develops a partial vacuum between the throttle assembly and the intake valves. Note that there is never a true vacuum in ANY engine, and when the throttle is wide open, there is very little vacuum.
Where to connect vacuum line for a vacuum advance?
Depends on the vehicle and how it is set up. Some are connected before the throttle plate (ported vacuum or delayed vacuum) and some are connected after the throttle plate (straight manifold vacuum). More info needed.
How to Check vacuumm on a 350 Chevy?
You need a vacuum gage, hook it to a vacuum port that has constant vacuum. It should have about 19 to 25 inches of vacuum at idle for a stock engine if the timing is set correctly. Now quickly snap the throttle wide open the gage should drop to about 5 then back to where it was. You can also set the timing by adjusting the distributor so you get highest vacuum reading.
Why does your 76 nova not stall when you remove the vacuum line from the distributor?
It won't. That vacuum line tells the distributor When to advance the timing. There isn't enough vacuum loss to stall an engine.
