Motor run-on
Thread Starter
Melting Slicks
Joined: Aug 2003
Posts: 2,135
Likes: 2
From: Dayton Oh
Motor run-on
Just recently, my engine has begun to run-on after the key is turned off. 
The engine is a non-stock 355 with only 7K miles. It began not too long after replacing the HEI and re-timing. Any suggestions as to why?
TIA
The engine is a non-stock 355 with only 7K miles. It began not too long after replacing the HEI and re-timing. Any suggestions as to why?TIA
Race Director
Joined: Feb 2005
Posts: 16,100
Likes: 17
Originally Posted by yogi78
If it is idling too high it will run on, also it could be hot spots or carbon in the combustion chamber causing run on. If its an automatic you could turn it off in gear and it won't run on.
Race Director
Joined: Apr 2000
Posts: 17,676
Likes: 201
From: Who says "Nothing is impossible" ? I've been doing nothing for years.
Make sure your idle is not too high or another thing that causes this is the timing is too retarded at idle and you set you idle up too high to compensate. 
Le Mans Master
Joined: Mar 1999
Posts: 6,744
Likes: 1
From: delmont pa
Cruise-In I Veteran
Cruise-In II Veteran
Originally Posted by marshrat99
Just recently, my engine has begun to run-on after the key is turned off. The engine is a non-stock 355 with only 7K miles. It began not too long after replacing the HEI and re-timing. Any suggestions as to why?
TIA
The engine is a non-stock 355 with only 7K miles. It began not too long after replacing the HEI and re-timing. Any suggestions as to why?TIA
Thread Starter
Melting Slicks
Joined: Aug 2003
Posts: 2,135
Likes: 2
From: Dayton Oh
This weekend I had my Mr. Goodwrench buddy bring over his good timing light. Turns out that the mechanical advance springs were way, way too light and were give full advance at 800RPM We replaced them with a stiffer set that gives full advance at 2600 and everything is fine now. Thanks every one. ! 
We replaced them with a stiffer set that gives full advance at 2600 and everything is fine now. Thanks every one. !
