Help! Hesitation on light acceleration - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old Apr 18th, 00, 03:28 PM Thread Starter
Tech Team
Dave
 
Join Date: Nov 1999
Location: Chelmsford, MA, 01824
Posts: 79
Post

My 67 RS hesitates for about 1 second when I take off from a stop and press the gas pedal ~1/4 inch. If I hold the gas pedal in that position and the transmission shifts from 1-2 I get the same hesitation for a second again.
My setup is a 327, 9.6:1cr, vortec heads, edel performer intake, edel 1406 600 cfm carb, MSD dist w/vac adv, MSD 6A, new MSD wires, A/C plugs, CompCam H268, 350 turbo, 2.73 rear. I've replaced the carb, replaced the exhaust, played with the timing, vac adv porting, metering rods, and idle mixture. I'm really stuck on what it could be. Please help!
If I set the idle mixture on the rich side the problems is not so bad.
Torch is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old Apr 19th, 00, 08:57 AM
Senior Tech
 
Join Date: Feb 2000
Location: V-burg ms, usa
Posts: 112
Cool

Torch,

Just a thought but, have ya tried the pump linkage?


71 Camairo
71 Camairo is offline  
post #3 of 4 (permalink) Old Apr 23rd, 00, 04:52 PM
Moderator
David Pozzi
 
davidpozzi's Avatar
 
Join Date: Nov 1999
Location: Central California, USA
Posts: 10,080
Post

At that speed you are probably not on the main circut, but the idle circut. In that case, it sounds like either the idle air corrector jets need to be smaller or the idle feed restriction jet needs to be enlarged.
Try running the engine at the throttle opening you have trouble and see if any fuel is coming out of the main nozzles.

Another fix is to drill a hole in the primary butterflies, which allows the throttle plate to be more closed at that rpm. This aligns the edge of the butterfly with the transfer slot.
Take a look down the primaries at the throttle angle you have trouble and see if the throttle blade is aligned with the transfer slot.

[This message has been edited by davidpozzi (edited 04-23-2000).]
davidpozzi is offline  
 
post #4 of 4 (permalink) Old Apr 24th, 00, 09:32 AM
Senior Tech
 
Join Date: Mar 2000
Location: Dtown PA
Posts: 820
Post

move the vacuume advance to another vaccume port. sometimes there is not enough vacuume on the side body of the carb, try one on the front bottom. (better to start simple before drilling into anything.)

------------------
Chris's 67 RS can be seen at http://www.geocities.com/macphreak4evr/index.html
JOIN THE CAMARO NET WEBRING! www.geocities.com/macphreak4evr/webring/webringjoin.htm !!!
Chris Edwards 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