- Joined
- Jul 12, 2010
- Messages
- 3,565
- Reaction score
- 773
- Location
- Killingworth, CT
- My Car
-
71 Mach 1
65 coupe
PCV is adding extra air into the intake, you need to increase your pump shot more to cover for the leaner mixture.
I suspect you're right. Problem is, it's already on the top hole and I bent the rod to get a bigger shot. I'm pretty maxed out . . .PCV is adding extra air into the intake, you need to increase your pump shot more to cover for the leaner mixture.
Then you'll need to increase the size of the discharge nozzle to deliver a faster pump shot. You can drill them if you have the appropriate size drill bits, or get the kit from Edelbrock.I suspect you're right. Problem is, it's already on the top hole and I bent the rod to get a bigger shot. I'm pretty maxed out . . .
I'll continue to check for other air leaks. Maybe I'm missing something.
Black can is a vacuum accumulator / check valve so you have steady vac to run your heater / ac actuators. You could pull it off and plug it for curiosity.On the passenger side near the firewall, they're the large blue can and a small black coffee can. The small black can connect to a vacuum port on the manifold and the other side appears to go through the firewall into the car.
What is that? I don't detect a leak there with carburetor cleaner, but I'm wondering if I should disconnect that hose and plug the manifold port while I troubleshoot.
Agreed. I'll reconnect the PCV this weekend and reset the idle air screws to see if it helps. It makes sense . . .73inNH.
Bentworker makes a good point.
if you adjusted your idle mixture with the pcv disconnected and plugged and then added it to the mix you are going to be leaner than you were before, also what pcv valve are you using ? different pcv valves have different metering values.
I too like the ME wagner adjustable pcv valve, also 650 rpm idle speed seems a tad low (by todays standards) unless you have a totally stock engine and I have no clue how the transfer slots work on your particular carb.
I've been following this topic pretty closely because your problem sounds an awful a lot like mine: Bogging down when mashing down on the gas pedal. I also have an Edelbrock Performer intake but with an Edelbrock 1406 carb. When I swapped out the intake and carb I plumbed the PCV valve into the carb like you did. Maybe this is my my issue too.So I bought an elbow and a grommet,
Mike,I've been following this topic pretty closely because your problem sounds an awful a lot like mine: Bogging down when mashing down on the gas pedal. I also have an Edelbrock Performer intake but with an Edelbrock 1406 carb. When I swapped out the intake and carb I plumbed the PCV valve into the carb like you did. Maybe this is my my issue too.
So, would you happen to still have the specs on the elbow and grommet you purchased? I'd like to see if that helps me out too.
Thanks,
Mike
There is not enough vacuum in the air cleaner (unless the filter element is plugged with dirt) to draw in the fumes from the crankcase. Both the breather and PCV are basically operating at atmospheric pressure. For it to function and evacuate the fumes the PCV valve must be plumbed into the intake. The fumes consist of moisture, unburned fuel and vapors from the engine oil, not something you want to stay in the crankcase and turn into corrosive goop.@boilermaster
My exact setup:
1. Run of the mill breather in passenger side valve cover.
2. PCV in driver side oil cap.
3. Hose from PCV to 14 round Edelbrock air cleaner.
A pic of my oil cap is attached.
Will this work well?
In essence, I want:There is not enough vacuum in the air cleaner (unless the filter element is plugged with dirt) to draw in the fumes from the crankcase. Both the breather and PCV are basically operating at atmospheric pressure. For it to function and evacuate the fumes the PCV valve must be plumbed into the intake. The fumes consist of moisture, unburned fuel and vapors from the engine oil, not something you want to stay in the crankcase and turn into corrosive goop.
The breather side of the system is plumbed into the air filter housing to provide a clean air source so that dust and dirt is not drawn into the crankcase.
The need for removing the fumes was recognized way back, and the original system was what was called a road draft tube to draw out the fumes and a breather cap that had some filtering built into it.
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