Engine Dieseling Trouble

[sta500666]

I recently put a stock 76' 350 from a 3/4-ton into my 86' Blazer. The problem is sometimes when I turn my truck off the engine diesels, I HATE it when engiens diesel. I had my timing set at 4 degrees, and then at 8 degrees. The engine dieseled at both settings. I also have the idle turned all the way down, but not sure about the fast idle if that matters. Does anyone have any solutions?

 

[pauly383]

Re: Timing Trouble

Well, mine does it sometimes when timing is too far advanced , or mostly when idle is set too high. If you had some bad gas or a day over 90 out it could do it too. Reset the timing for the original engine application , and idle speed too. /forums/images/graemlins/k5.gif

 

[jakeslim]

Re: Timing Trouble

I struggled with the same thing forever. Only fix was new carb and intake. Never has done it again. It is such a pain and kinda embarassing when your already walking away the the damn truck is sputtering and spitting

 

[POWERMAD]

Do ya know the history of the engine??
If you are idling at about 700 or so and it is still runnin on I would suspect carbon build up.
Excessive amounts can and will stay hot enough to ignite fuel after you shut it off.
With that scenerio I rev it at idle to about 3K and with a spray bottle squirt water down the carb, then take it out and run the [darn] out of it.