Normal or Abnormal?

[sgavin83]

Hey Everyone,
I recently purchased a 1974 Ford F-100. It had a factory standard 302 in it, but when I got it had been replaced by a 351 Windsor. It currently has an Edelbrock 4 barrel carbuerator in it.

Now...for my question...I've noticed this, as it doesn't always happen, when I turn off the engine. It seems to on occaision sit there and sputter for a few seconds, at most maybe 3-6 seconds after I turn it off. Is this normal or is there something that needs to be adjusted/fixed/looked at to correct this problem? I've seen a bunch of older vehicles do this and have been told since the carbuerator is mechanical fuel injection, it is relatively normal for this to happen. Any input on this question/concern would be awesome.

Thanks everyone!
Sean

 

[smokey]

Check your timing

 

[LEB Kris]

its called dieseling....I guess because the engine sounds like a diesel when you turn the key off....and yes its rather common.


Check your timing (Im not too familiar with small blocks but it should be around 10* btdc inital) and that the carb idle is set correctly. (~800rpm is about right)

 

[TexasRho83]

Dieseling. Had only one truck do it...

Kinda funny if it's someone else's but if it's yours it makes you look like a dumb ol' geezer trying to get to the liquor store at 10 AM for your bottle...

 

[LEB Kris]

I resent that statement!

 

[LEB Paul]

I represent that statement!

FYP


:flipoff2:

 

[LEB Kris]

ok, maybe youre right but I dont think I reach geezer status for a few more years.

 

[TexasRho83]

I have Booooooooo

 

[LEB Kris]

Think youve got me beat?

 

[LEB Paul]

ok, maybe youre right but I dont think I reach geezer status for a few more years.

You walk with a cane

:flipoff2:

 

[TexasRho83]

32 going on 60

 

[LEB Kris]

yeah I guess you do. 28

 

[TexasRho83]

youngster. Come back when you have chin whiskers, son!

 

[LEB Kris]

I got your chin whiskers.

 

[TexasRho83]

I dont even wanna know where you have em...

 

[Mil1ion]

Us older guys in the know call it Run-on...and yes it is caused by the timing being out or carbonized spark plugs still wanting to ignite unburnt fuel.

 

[sgavin83]

To everyone

Thanks for all the information everyone. I already know it wasn't the spark plugs. Those were pretty much the first thing I changed. I'll check the ignition timing tomorrow.

Thanks again everyone!

Sean

 

[Jolly Green]

I had this problem a while back and the guys here helped me out.

Two things: Timing did a lot for it. It still deisled a bit after timing, but not as bad, and not every time. After that, I started running higher grade fuel and it hasn't done it since. I think I read something about using the higher octane fuel in the write-up Mil1ion posted in my thread.

http://www.fordtruckfanatics.com/forum/showthread.php?t=13004


So, no more dieseling--just spending more money on gas in a truck that already gets 10mph!

 

[73F100Shortbed]

10mph!

That truck is SLOW! Wanna race for titles?

J/K I know you meant to say mpG

 

[Jolly Green]

That truck is SLOW! Wanna race for titles?

J/K I know you meant to say mpG

Oops! Yea, I did mean MPG!

You're still right though--4.10 gears and a four speed. I can pull a house down, but I can't beat a fat kid on a Huffy in the 1/4 mile!