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Carter AVS Problem
#111174
08/27/08 03:27 PM
08/27/08 03:27 PM
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Joined: Jan 2003
Posts: 2,640
Port Reading, NJ
roadrunner7070
OP
master
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OP
master
Joined: Jan 2003
Posts: 2,640
Port Reading, NJ
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On my 70 Roadrunner the original which I recently had rebuilt Carter AVS doesn't seem to be opening the secondaries. I had the car in the tranny place for him to set the kickdown linkage and he remarked to me that something doesn't appear to be right with the motor. It is not a tranny problem he says. The tranny kicks down but the car will not seem to go past 70 mph till I let up off the gas when I am in kickdown mode. My mechanic looked at it and did some tinkering and said the secondaries on stand still seem to be opening but after driving it there is just no power at kickdown. So he now thinks the secondaries are not opening. You don't get that massive pull from the motor. Everything is new. My mechanic said he was going to do a fuel pressure test to rule out the fuel pump. With 3:55 gears and the motor bored 30 over you would thing that I could at least squeel the tires but no luck. What should I be looking for or checking?
Last edited by roadrunner7070; 10/12/08 09:40 PM.
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Re: Carter AVS Problem
[Re: 69Cuda340S]
#111176
08/27/08 03:48 PM
08/27/08 03:48 PM
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Joined: Jan 2003
Posts: 2,640
Port Reading, NJ
roadrunner7070
OP
master
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OP
master
Joined: Jan 2003
Posts: 2,640
Port Reading, NJ
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Quote:
With the hood open and air cleaner off you should be able to blip the throttle with it running and see the secondary air valve open up. Make sure its not too tight. Checking for lack of fuel flow is a good ideal too.
But will you be able to tell if they are opening fully? I believe this carb has manual secondaries.
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Re: Carter AVS Problem
[Re: roadrunner7070]
#111177
08/27/08 03:56 PM
08/27/08 03:56 PM
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Joined: Jan 2003
Posts: 75,094
A Banana Republic near you.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,094
A Banana Republic near you.
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Quote:
Quote:
With the hood open and air cleaner off you should be able to blip the throttle with it running and see the secondary air valve open up. Make sure its not too tight. Checking for lack of fuel flow is a good ideal too.
But will you be able to tell if they are opening fully? I believe this carb has manual secondaries.
yes the carb has manual secondaries and it's easy to tell if they open all the way , there is a spring on the linkage on the pass side of the carb and if they are hitting something the primaries will open fully but not the secondaries .
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Re: Carter AVS Problem
[Re: 69Cuda340S]
#111178
08/27/08 04:00 PM
08/27/08 04:00 PM
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Joined: Jan 2003
Posts: 4,999
North Pole,New York
formula_s
master
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master
Joined: Jan 2003
Posts: 4,999
North Pole,New York
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Quote:
With the hood open and air cleaner off you should be able to blip the throttle with it running and see the secondary air valve open up. Make sure its not too tight. Checking for lack of fuel flow is a good ideal too.
JUST BE SURE TO STAND BY THE SIDE IF THE CAR WHEN PERFORMING THIS TEST,NOT IN FRONT OF IT.
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Re: Carter AVS Problem
[Re: roadrunner7070]
#111182
08/27/08 05:31 PM
08/27/08 05:31 PM
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Joined: Aug 2004
Posts: 3,333
MARYLAND
69Cuda340S
master
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master
Joined: Aug 2004
Posts: 3,333
MARYLAND
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Quote:
Quote:
With the hood open and air cleaner off you should be able to blip the throttle with it running and see the secondary air valve open up. Make sure its not too tight. Checking for lack of fuel flow is a good ideal too.
But will you be able to tell if they are opening fully? I believe this carb has manual secondaries.
You will see the Secondary Air Valve flip open if its working correctly.
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Re: Carter AVS Problem
[Re: roadrunner7070]
#111186
10/12/08 08:58 PM
10/12/08 08:58 PM
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Joined: Jan 2003
Posts: 9,436
Blair County,PA
62maxwgn
master
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master
Joined: Jan 2003
Posts: 9,436
Blair County,PA
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Quote:
Well I played around with the secondary valve and adjusted it for 2 turns counterclockwise and no secondaries. Then I loosened it up 1 turn and still no secondaries opening. What is the deal with this factory carb. Were these AVS carbs junk to begin with? Looks like after all these years and even being totally rebuilt I am going to have to junk it and go with an Edelbrock.
Where do you think the Edelbrock originated ? 
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Re: Carter AVS Problem
[Re: 62maxwgn]
#111187
10/12/08 09:26 PM
10/12/08 09:26 PM
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Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
mike s
top fuel
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top fuel
Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
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Anyone adjust the throttle cable?
Leave the gun.......take the Cannoli's....Mike
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Re: Carter AVS Problem
[Re: mike s]
#111188
10/12/08 09:33 PM
10/12/08 09:33 PM
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Joined: Jan 2003
Posts: 2,640
Port Reading, NJ
roadrunner7070
OP
master
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OP
master
Joined: Jan 2003
Posts: 2,640
Port Reading, NJ
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Quote:
Anyone adjust the throttle cable?
No. Not since I put the new one on when I finished restoring the car. I even took the car back to the tranny guy to set the kickdown lever and he was the first to notice there was something wrong with the carb.
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Re: Carter AVS Problem
[Re: 62maxwgn]
#111189
10/12/08 09:37 PM
10/12/08 09:37 PM
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Joined: Jan 2003
Posts: 2,640
Port Reading, NJ
roadrunner7070
OP
master
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OP
master
Joined: Jan 2003
Posts: 2,640
Port Reading, NJ
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Quote:
Quote:
Well I played around with the secondary valve and adjusted it for 2 turns counterclockwise and no secondaries. Then I loosened it up 1 turn and still no secondaries opening. What is the deal with this factory carb. Were these AVS carbs junk to begin with? Looks like after all these years and even being totally rebuilt I am going to have to junk it and go with an Edelbrock.
Where do you think the Edelbrock originated ?
Difference is the old rebuilt carb is 38 years old and is not always going to work correctly and the new Edelbrock should work with no problem right out of the box.
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Re: Carter AVS Problem
[Re: roadrunner7070]
#111192
10/12/08 10:14 PM
10/12/08 10:14 PM
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Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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just push down on the secondary air valve & see if it will open, shouldn't take much then loosen the screw/button for the thin coil spring that holds it closed & get it as loose as you want then take it out & your secondaries will open & you'll know if that is the problem. Have it warmed up as mentioned there is an interlock.
live every 24 hour block of time like it's your last day on earth
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