Edited by GML-31, 20 April 2006 - 07:37 AM.
quadrajet
Started by
GML-31
, Apr 20 2006 07:36 AM
5 replies to this topic
#1
GML-31
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Posted 20 April 2006 - 07:36 AM
anyone know what the common cause in a rochy is when car appears to be running a little rich but has a massive flatspot when you boot it... give it a couple of seconds and it passes the flat spot and is fine, but its getting rather annoying....this is on my group A VK
#2
_MRNOS_
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Posted 20 April 2006 - 08:00 AM
In a torana i had years ago it had a vk 308 in it with a quady it had the same problem, i noticed it was leaking a bit from some of the seals/gaskets got it rekitted problem solved-they seem real sensitive to air leaks...
#3
GML-31
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Posted 20 April 2006 - 08:06 AM
I am hoping thats all it is myself but will take all advice.
#4
Dr Terry
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Posted 20 April 2006 - 09:52 AM
Hi Guys.
There are 2 main reasons why you could have a flat spot in a Q-Jet.
1. The accelerator pump not working fully, easy to check. If it's not working get the carby overhauled by somebody who knows Q-Jets.
2. The secondaries opening too quickly, either because the vacuum diaphragm is not working or not connected, or the tension on the secondary spring is too slack, both of these are easily checked & repaired on the car, without removing the carby.
If you were in Sydney I could fix it for you.
Dr Terry.
There are 2 main reasons why you could have a flat spot in a Q-Jet.
1. The accelerator pump not working fully, easy to check. If it's not working get the carby overhauled by somebody who knows Q-Jets.
2. The secondaries opening too quickly, either because the vacuum diaphragm is not working or not connected, or the tension on the secondary spring is too slack, both of these are easily checked & repaired on the car, without removing the carby.
If you were in Sydney I could fix it for you.
Dr Terry.
#5
Redslur
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Posted 20 April 2006 - 12:24 PM
I'm with Dr Terry.
9/10 times it is the secondary flap opening too soon. Leans the mixture out. You can easily adjust the small grub screw under the flap itself. It would be a trail and error thing but simple to do. Put as mitivac on the vacuum diaphram and make sure it isn't leaking. It is normally the first option though..
cheers
Redslur
9/10 times it is the secondary flap opening too soon. Leans the mixture out. You can easily adjust the small grub screw under the flap itself. It would be a trail and error thing but simple to do. Put as mitivac on the vacuum diaphram and make sure it isn't leaking. It is normally the first option though..
cheers
Redslur
#6
makka
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Posted 20 April 2006 - 12:50 PM
<agrees with^
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