Club Cobra

Club Cobra (http://www.clubcobra.com/forums/)
-   ALL COBRA TALK (http://www.clubcobra.com/forums/all-cobra-talk/)
-   -   Motor Running On (http://www.clubcobra.com/forums/all-cobra-talk/41674-motor-running.html)

agro1 05-21-2003 08:20 AM
Motor Running On
 
My stroker is continuinig to run and sputter (sounds like detonation) for a brief second after I kill it - I run 108 leaded mixed with 91 pump gas. The carb was just tuned not too long ago so I'm wondering why this would be happeneing ??? Any thoughts ??

Mr.Fixit 05-21-2003 08:29 AM
Lower the idle speed. If that doesn't work, than leave it in gear, with your rght foot FIRMLY on the brake, let the clutch drag ever so slightly when killing the motor. This won't attack the cause of your dieseling problem, but will stop the symptoms.

agro1 05-21-2003 08:33 AM
Fixit - So what are the probable causes of my deiseling problem ?? Thanks in advance.

dscott 05-21-2003 09:20 AM
agro1, The other problem that causes run on is the electric fan. If you don't have it isolated with a diode or relay it will generate power back to the ignition until the fan stops. Otherwise fixit is right, you may need to lower idle speed. I also find that if you let the engine idle for a few seconds after you stop, it will settle and not run on.
Don

agro1 05-21-2003 09:26 AM
Thanks guys - much appreciated :)

Mr.Fixit 05-21-2003 09:37 AM
He has a SPF, the fan is fully isolated from the ign circuit by a relay. It's a dieseling problem, hot spots in the chamber. Maybe his plugs are a bit too hot for a 12:1 motor.

agro1 05-21-2003 09:40 AM
Hmmmmmm....Well this only started happening a couple weeks ago. I've never had the problem before...Sounds like a POS Honda when I shut it off...Total buzz kill. :(

bmalone 05-21-2003 09:45 AM
My car runs on--but I expect it to. I set the idle at 1200 to keep the plugs clean. Lowering the idle has always cured the run-on, but I prefer to leave the idle high for other reasons.

One other thing I have noticed is, retarding the timing just a tad cured the run-on as well. Of course, you run the risk of affecting performance by doing this.

I do the let the clutch out thing.

Back in Black 05-21-2003 09:52 AM
Fixit is right..
 
If you allow it to run on, it may also reverse direction at the end of the run, causing damage to the motor. Kill it asap, using the process fixit suggests.

Traveller 05-21-2003 01:20 PM
Here's some other reasons not to let your motor deisel.

1) it's embarrasing

2) Your not exactly getting good oil pressure while it chokes and sputters so you're putting a lot of needless wear on your motor's internal parts.

I have found that setting the curb idle too high is usually the reason.


All times are GMT -7. The time now is 01:40 AM.

Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: