QJet question - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old Nov 1st, 01, 03:57 AM Thread Starter
Senior Tech
 
Join Date: Jul 2001
Location: Columbus, GA
Posts: 867
Question

On my '69 Z11 with Qjet topped 350/4 spd, when I rev the engine to open the secondaries(parked w/breather off), I notice fuel splash
onto the top of the secondary butterfly. This could explain the fuel smell when I drive the car.
Is this normal for a Qjet to spray fuel like this?

------------------
'69 Z11 Pace Car, 350/4 speed
drdave69 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old Nov 1st, 01, 04:18 PM
Senior Tech
 
Join Date: Jan 2002
Posts: 505
Cool

Not sure if it's normal, but my 68 Firebird 400 does the same thing but runs great! (It will also knock the socks off and L34 Camaro) heehee


-Gary
cavemate is offline  
post #3 of 8 (permalink) Old Nov 1st, 01, 06:40 PM
XK1
Senior Tech
 
Join Date: Aug 2001
Location: Las Vegas, NV
Posts: 133
Post

Mine did the same thing.

------------------
76 Camaro/mild 350 .030/M21/Z28 body parts/lotsa other goodies
XK1 is offline  
 
post #4 of 8 (permalink) Old Nov 2nd, 01, 02:36 AM
Gold Lifetime Member
Paul
 
PDQUICK's Avatar
 
Join Date: Oct 2001
Location: Londonderry, NH
Posts: 1,010
Post

The Q-jets all do this!

------------------
Mighty Mouse
PDQUICK is offline  
post #5 of 8 (permalink) Old Nov 4th, 01, 07:29 PM
Senior Tech
 
Join Date: May 2001
Location: Ashby,MN, USA
Posts: 8,305
Post

i personally have never seen any of mine do this, but i guess i wasn't really looking, either.my secondary air door never opens when there is no load on it, so i will never see it happen.

------------------
1971 Nova(looks like 69 camaro from underneath!)
355sb, vortec heads, HOT cam,T-10 tranny, 3.70 gears 16" IROC wheels
novaderrik is offline  
post #6 of 8 (permalink) Old Nov 11th, 01, 11:04 AM
 
Join Date: Oct 2001
Location: davisburg, mich, united states
Posts: 13
Post

yep mine does it too
307camaro is offline  
post #7 of 8 (permalink) Old Nov 12th, 01, 10:49 AM
Moderator
David Pozzi
 
davidpozzi's Avatar
 
Join Date: Nov 1999
Location: Central California, USA
Posts: 10,074
Post

There are small holes near the front lip of the air valve. The valve starts to open and pulls fuel out of the holes which are plumbed into small brass tubes with jet on the end into small "wells" the wells are replenished from the fuel bowl via a small jet hole drilled in the well wall.
It acts like an accelerator pump for the secondaries, gives a small splash of fuel when the air valve opens.
David

------------------
Check my web page for First Gen Camaro suspension info:
David's Motorsports page
First Gen Suspension Page
67 RS 327
69 Camaro Vintage Racer
65 Lola T-70 Chev 350 Can-Am Vintage Racer
davidpozzi is offline  
post #8 of 8 (permalink) Old Nov 13th, 01, 05:02 AM
Gold Lifetime Member
Paul
 
PDQUICK's Avatar
 
Join Date: Oct 2001
Location: Londonderry, NH
Posts: 1,010
Post

A really neat thing to do!!! If you have access to a Chevy Van with a Q-jet, drive it around town with the engine cover and air cleaner removed. It looks like Niagra Falls when the secondaries open!!! Gas splashes everywhere while the air flap is opening.

I used to do this at my garage to diagnose tough performance problems on vans sometimes but, it's kind of a ball for a gearhead!! Very loud and very windy though!!

------------------
Mighty Mouse
PDQUICK is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome