Search



Go Back   MustangForums.com > Ford Mustang Tech > Classic Mustangs (Tech)
Sign in using an external account
Register Forgot Password?
Search

Classic Mustangs (Tech) Technical discussions about the Mustangs of yester-year.

Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread
Old 05-17-2013, 08:06 PM   #1
ricmarcarp
 
Join Date: May 2013
Vehicle: 1969 Mustang Grande
Location: Michigan
Posts: 7
Angry sputtering cleveland

have a 69 grande with a Cleveland motor that runs good as long as your pushing the gas pedal, if you ease up, it starts to run rough. idles fine, any ideas?
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
ricmarcarp is offline   Reply With Quote
Old 05-18-2013, 02:31 AM   #2
67mustang302
6th Gear Member
 
Join Date: Apr 2007
Vehicle: 67 Mustang Coupe
Location: California
Posts: 10,343
Default

You're saying it stumbles when you let off the throttle? In neutral, deccel in gear, what rpm etc.
__________________
Who cares how much horsepower it has, all that matters is how fast it goes!

Untested 331, lots of suspension, chewing up corners.
67mustang302 is offline   Reply With Quote
Old 05-18-2013, 12:48 PM   #3
ricmarcarp
 
Join Date: May 2013
Vehicle: 1969 Mustang Grande
Location: Michigan
Posts: 7
Default

not a problem in neutral, haven't really checked the rpms when this is happening, all this started when I took it in for a tune-up a couple of weeks ago.
ricmarcarp is offline   Reply With Quote
Old 05-18-2013, 12:51 PM   #4
ricmarcarp
 
Join Date: May 2013
Vehicle: 1969 Mustang Grande
Location: Michigan
Posts: 7
Default

it runs strong & sounds great until you let up on the gas
ricmarcarp is offline   Reply With Quote
Old 05-18-2013, 02:20 PM   #5
67mustang302
6th Gear Member
 
Join Date: Apr 2007
Vehicle: 67 Mustang Coupe
Location: California
Posts: 10,343
Default

So what, when you're cruising normally and just let off the gas?

Does it idle rich?
__________________
Who cares how much horsepower it has, all that matters is how fast it goes!

Untested 331, lots of suspension, chewing up corners.
67mustang302 is offline   Reply With Quote
Old 05-18-2013, 05:56 PM   #6
ricmarcarp
 
Join Date: May 2013
Vehicle: 1969 Mustang Grande
Location: Michigan
Posts: 7
Default

Yes, it does it when I cruise, took it back to the shop and they are going to check the
carb on Monday.
ricmarcarp is offline   Reply With Quote
Old 05-18-2013, 06:57 PM   #7
67mustang302
6th Gear Member
 
Join Date: Apr 2007
Vehicle: 67 Mustang Coupe
Location: California
Posts: 10,343
Default

It could just be a slightly rich idle and/or no dashpot.
__________________
Who cares how much horsepower it has, all that matters is how fast it goes!

Untested 331, lots of suspension, chewing up corners.
67mustang302 is offline   Reply With Quote
Old 05-18-2013, 06:57 PM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 02:58 AM.

© Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup