Birddog1970
Apr 29th, 05, 9:43 PM
Need some help please. Just install the cowl induction on my 70 SS. I purchased all the items new. Here is what is currently happening.
- Car is off -- cowl hood door open
- Turn car on -- cowl hood door open
- Rev motor -- cowl hood door closes
- let off gas -- cowl hood door opens
Vacuum line from pod runs into a T-connector, which also has my vacuum advance for my distributer hooked .. which then connects to the outlet on my carb (holly 750 dp)
1st question -- Should I hook up the vacuum line somewhere else (not getting enough vacuum maybe?)
Next -- When I rev the motor up the cowl hood door remains closed ... haven't been able to drive yet because of snow today . Shouldnt the door open under higher RPMs?
Next problem -- I have the inner door setup also. My understanding is when I put the gas to the floor it will hit the switch (which it does) and move the slider on the switch (which it does) and that will make the solenoid pull the inner flap door open. Right now it just remains closed. The wiring was pretty simple and its hooked up correctly. IGN Pink Wire and ACC Tan Wire in fuse box. Its then connected into the relay then off to the solenoid. The assembly manual states "With the valve closed and solenoid in bracket and attached to valve, hold solenoid plunger depressed, pull back to remove all end play and then clamp..." I have no play in the solenoid which is connected to the inner frame door.
Where am I going wrong here? Could it be a ground and if so where is the ground at (no extra wire in the harness for a ground).
And could someone explain how this is really suppose to work .. Does MORE vacuum cause the Outer Cowl Door to open and works independetly from the swich on the throttle which is for the inner door?
I looked through the pages in the assembly manual and am not missing anything.
Im confused
Dave
Just found this in the tech line but still doesnt answer why I'm having the problems ...
-----
Ok, here we are at Cowl Induction class. The course number is 101, so pay attention students!
Cowl Induction (factory 1970 thru 1972) is designed to funnel outside fresh cool air into the air cleaner for a more efficient running engine. With the car shut off, the outer door is spring loaded open/tilted upwards, when you start the car, engine vacuum pulls the outer door closed by a somewhat large diaphram "Pod" immediately underneath the hood so the hood is all nice & even & flat.
When you stomp on it, engine vacuum decreases & the spring pops the door open to allow fresh air in as described above, that is the first step.
The second step is an electric switch on the gas pedal similar to a brake light switch, that operates a solenoid inside the hood that opens up a wide "flapper" door inside the hood.
So, step on it, engine vacuum drops, the outer door opens, at the same time the switch on the gas pedal opens up the inner hood door & presto, you have "High Performance".
----
- Car is off -- cowl hood door open
- Turn car on -- cowl hood door open
- Rev motor -- cowl hood door closes
- let off gas -- cowl hood door opens
Vacuum line from pod runs into a T-connector, which also has my vacuum advance for my distributer hooked .. which then connects to the outlet on my carb (holly 750 dp)
1st question -- Should I hook up the vacuum line somewhere else (not getting enough vacuum maybe?)
Next -- When I rev the motor up the cowl hood door remains closed ... haven't been able to drive yet because of snow today . Shouldnt the door open under higher RPMs?
Next problem -- I have the inner door setup also. My understanding is when I put the gas to the floor it will hit the switch (which it does) and move the slider on the switch (which it does) and that will make the solenoid pull the inner flap door open. Right now it just remains closed. The wiring was pretty simple and its hooked up correctly. IGN Pink Wire and ACC Tan Wire in fuse box. Its then connected into the relay then off to the solenoid. The assembly manual states "With the valve closed and solenoid in bracket and attached to valve, hold solenoid plunger depressed, pull back to remove all end play and then clamp..." I have no play in the solenoid which is connected to the inner frame door.
Where am I going wrong here? Could it be a ground and if so where is the ground at (no extra wire in the harness for a ground).
And could someone explain how this is really suppose to work .. Does MORE vacuum cause the Outer Cowl Door to open and works independetly from the swich on the throttle which is for the inner door?
I looked through the pages in the assembly manual and am not missing anything.
Im confused
Dave
Just found this in the tech line but still doesnt answer why I'm having the problems ...
-----
Ok, here we are at Cowl Induction class. The course number is 101, so pay attention students!
Cowl Induction (factory 1970 thru 1972) is designed to funnel outside fresh cool air into the air cleaner for a more efficient running engine. With the car shut off, the outer door is spring loaded open/tilted upwards, when you start the car, engine vacuum pulls the outer door closed by a somewhat large diaphram "Pod" immediately underneath the hood so the hood is all nice & even & flat.
When you stomp on it, engine vacuum decreases & the spring pops the door open to allow fresh air in as described above, that is the first step.
The second step is an electric switch on the gas pedal similar to a brake light switch, that operates a solenoid inside the hood that opens up a wide "flapper" door inside the hood.
So, step on it, engine vacuum drops, the outer door opens, at the same time the switch on the gas pedal opens up the inner hood door & presto, you have "High Performance".
----