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Topic: Q-Jet Cough

in Forum: C3 Fuel, Emission Control, and Exhaust Systems

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Q-Jet Cough

Posted: 10/10/08 7:21pm Message 11 of 24
acplus
Former Member
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Canada
Joined: 6/23/2008
Posts: 558
Vette(s): 1972, 1980
Carb tuning takes time but well worth it. Don't forget to make sure that the choke is coming off.
John



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Q-Jet Cough

Posted: 10/12/08 6:51pm Message 12 of 24
KDADDY79
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Dutchess County, NY - USA
Joined: 8/27/2007
Posts: 2484
Vette(s): White '79 Corvette. It's a driver.
I think I found It! Really! I really think I found the problem once and for all!!!
Recently I put on a new (used from a friend) air cleaner. It's non stock and is open all the way around. It also has a flat bottom which slightly intereferes with the operation of the pivot arm that controlls the accelarator pump. This in turn causes the rod to the accelarator pump to fight the upward motion due to the resistance caused by the bottom of the air cleaner.
With the air cleaner off- no problem.
With the air cleaner on- "Q-Jet Cough"
I'm not an accomplished mechanic by any means but I found an interuption in what should otherwise be a smooth operation.
Any more input is welcome!
Kevin



Q-Jet Cough

Posted: 10/12/08 7:03pm Message 13 of 24
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kstyer
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CUYAHOGA FALLS, OH - USA
Joined: 12/2/2003
Posts: 6424
Vette(s): 1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there!
Not the first time I have seen that with an aftermarket air cleaner.   Glad you found it.


Q-Jet Cough

Posted: 10/13/08 12:06pm Message 14 of 24
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DaveM
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Flanders, NJ - USA
Joined: 1/27/2004
Posts: 2553
Vette(s): 1982 Black, ZZ4, Hooker Side Pipes, 3.55 Rear, Rebuilt & upgraded 700R4, All new suspension, brakes, & new Charcoal interior.
So Kevin, should I bring my air cleaner with me to the show?LOL
Really, I still have it so let me know if you want it.
Dave



 

Lifetime Member #116
Dave's '82

   

Q-Jet Cough

Posted: 10/13/08 4:59pm Message 15 of 24
KDADDY79
Former Member
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Dutchess County, NY - USA
Joined: 8/27/2007
Posts: 2484
Vette(s): White '79 Corvette. It's a driver.
Bring it on, Dave!
Much appreciated!!
 
Kevin



Q-Jet Cough

Posted: 10/14/08 5:51pm Message 16 of 24
acplus
Former Member
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Canada
Joined: 6/23/2008
Posts: 558
Vette(s): 1972, 1980
I had to put a 1/2" spacer (Mr Gasket) under my aftermarket breather, did earlier realize you had a different breather, if you want to use the aftermarket one this spacer will work for you and it cheap.
John



Q-Jet Cough

Posted: 10/14/08 6:00pm Message 17 of 24
KDADDY79
Former Member
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Dutchess County, NY - USA
Joined: 8/27/2007
Posts: 2484
Vette(s): White '79 Corvette. It's a driver.
John,
I took a look at those a few days ago but worried about hood clearance, so I held off.
It's lookin' like DaveM's generosity will solve this little problem soon enough. (We should be meetin' up at a nice car show this Sunday in Staatsburgh, N.Y.)
Good info, though. Thanks.
Kevin 
 



Q-Jet Cough

Posted: 10/14/08 6:04pm Message 18 of 24
acplus
Former Member
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Canada
Joined: 6/23/2008
Posts: 558
Vette(s): 1972, 1980
Just for tech info....It allows for about 3/4" clearance with the GM bow tie on top, I haven't had any problems with the ones I have installed...yet,  Dave's will be better


Q-Jet Cough

Posted: 10/14/08 6:29pm Message 19 of 24
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kstyer
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CUYAHOGA FALLS, OH - USA
Joined: 12/2/2003
Posts: 6424
Vette(s): 1975 C3 Red, T-Tops, Black Interior. All I need is time and money! Getting there!
I have to admit, I have an aftermarket air cleaner which created the same problem.  I used my  body hammer and created a dimple that allows the clearance for the pump linkage.


Q-Jet Cough

Posted: 10/14/08 6:54pm Message 20 of 24
KDADDY79
Former Member
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Dutchess County, NY - USA
Joined: 8/27/2007
Posts: 2484
Vette(s): White '79 Corvette. It's a driver.
I have to admit, I thought about hittin' my aftermarket air cleaner with a hammer, too. I think I was after different resluts at the time, though. LOL
Hey, I'm no worse for the wear. I get a kick out of learning about this kind of thing
Before I joined this site about all I could do was check the earl.



in Forum: C3 Fuel, Emission Control, and Exhaust Systems


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