Jump to content

The RennTech.org community is Member supported!  Please consider an ANNUAL donation to help keep this site operating.
Click here to Donate

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)
Sign in to follow this  

1966 912

Recommended Posts

I have a 1966 912.....hard to start...have to keep pumping the gas to it......when I finally get it started and get the revs up it sounds semi right ....but if I let my foot off the gas it dies out......the temp guage never moves. Looked at the carb on the left as you are looking at the motor and it appears to be leaking gas......is it possible that the car is not running on all cylinders and that the gas has fouled out a plug or two and the car is only running on 2 or 3 cylinders? When in first gear and giving it gas...semi ok....put it into second and dies out......anybody got any ideas?

Share this post

Link to post
Share on other sites
    You can remove these ads by becoming a Contributing Member.

You'll need to do a little diagnostics. Test the fuel pump pressure and volume. Remove the air filters, look down the carb throttle and operate the accellerator to see if they are discharging fuel. Any vacuum leaks?

With a vehicle of this age it's very common to find corroded fuel lines and tank. Has the fuel filter ever been replaced? A fuel leak of any type is serious let alone one on a air cooled engine. Never open the fuel system on a hot or even warm engine as the exhaust heat exchangers are famous for trapping raw fuel/oil and can ignite in a fraction of a second.

Have a fire suppressor at hand.

Share this post

Link to post
Share on other sites

wvicary makes good points.

I would add to check that you don't have one or more stuck floats on the carbs. A stuck float will overflow the carb and give many of the same symptoms you mention.

Share this post

Link to post
Share on other sites

In response to wvicary/Loren...new tank, lines, fuel filter, pump.....new carbs...not sure what type......I have a feeling that the carbs are not jetted properly and the plugs are fouled and not running on all cylinders....I am going to pull the plugs.....any advice there?

Share this post

Link to post
Share on other sites

Be sure the engine oil isn't contaminated by petrol. No blockages in the exhaust system.

Share this post

Link to post
Share on other sites

Agree, Stuck float. Pull the fuel level sender & have a look in the tank for rust. Use a mirror & flashlight & look @ the upper surfaces. Carbs need to be gone thru too. Stuck float will not be the only problem. Solex or Weber carbs???


Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.