engine surge at idle - Team Camaro Tech
Engine General Engine Discussion.

LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old Sep 14th, 04, 05:03 PM Thread Starter
Join Date: Mar 2002
Posts: 57

I just replaced my 750 Holley with a new street avenger 670. I still have the same problem, a slight surge up and down at idle, and engine wants to idle back down to slow. I have check for vacum leaks, and checked the timing. Both are ok. What else can it be?
ambush904 is offline  
Sponsored Links
post #2 of 4 (permalink) Old Sep 14th, 04, 05:30 PM
Senior Tech
Join Date: Mar 2002
Location: Austin, TX, USA
Posts: 5,277

Plug the PCV line and see if that helps. The PCV valve is essentially a flow regulator. It could be that it is flowing too well and acting like a vacuum leak. A different PCV valve may fix the problem. But disconnecting it should tell you something. If it don't change, it probably isn't it. Also make sure your mechanical and vacuum advance are working properly. If the mechanical advance is kicking in too soon or the vacuum advance can is too tight, RPM changes will cause timing changes.

68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
dnult is offline  
post #3 of 4 (permalink) Old Sep 15th, 04, 05:59 AM
Senior Tech
Matt Jones
Join Date: Jan 2002
Location: Renton, WA USA
Posts: 2,765

What ignition curve are you running? Where does the curve start? Is your vacuum advance at full vacuum?

Also, pull the carb off and tell us how much of the transfer slots are exposed. They should appear square.

What cam are you using?

Matt Jones
Lead Mechanical Engineer
Art Morrison Ent. Inc.
Silver69Camaro is offline  
post #4 of 4 (permalink) Old Sep 15th, 04, 05:30 PM Thread Starter
Join Date: Mar 2002
Posts: 57

Found the problem, It was the fast idle cam adjustment.
ambush904 is offline  
Sponsored Links

Quick Reply

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


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:


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