Engine won't turn off sometimes...
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New User
Joined: Nov 2011
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Engine won't turn off sometimes...
Hey guys tried doing a search for this problem prior but I'm guessing I'm not asking the right question....
Anyway sometimes more often than not when i turn the key to shut her off...she doesn't want to turn off...the key turns but the engine will keep turning it sounds for anywhere from 3 secs to up to 15 seconds and finally die or turn off...Im guessing it has something to do with the carb? Its a 4-bbl Holley carb and I included some pics of it...please help where to start. Thanks!
79 Ford F100 4x4
Anyway sometimes more often than not when i turn the key to shut her off...she doesn't want to turn off...the key turns but the engine will keep turning it sounds for anywhere from 3 secs to up to 15 seconds and finally die or turn off...Im guessing it has something to do with the carb? Its a 4-bbl Holley carb and I included some pics of it...please help where to start. Thanks!
79 Ford F100 4x4
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New User
Joined: Nov 2011
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I just purchased her about 3 weeks ago..so i have no idea..is that what I should be looking up on here?
Fleet Owner
Joined: Dec 2009
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From: NorCal
IMO, FTE isn't a substitute for doing your own homework.
Fleet Mechanic
Joined: Jun 2007
Posts: 1,931
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From: Ohio
Yea my engine did what it sounds like yours is doing when I bought it. The timing was set too high and the cooling system wasn't doing a great job because it needed new fluid and a thermostat so it'd run hotter than it should. As stated above check your timing and figure out how to adjust that carb if necessary.
Post Fiend
Joined: Mar 2011
Posts: 8,501
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From: Lynchburg, VA
How would that have any effect? His problem results from either running too lean of a mixture, too high of idle, or incorrect ignition timing.
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New User
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No. Pardon me if I come off as a hardass but do yourself a favor and buy a basic manual published by Haynes or Chilton (about $20) and start reading, learning, and doing. If you get stuck or are confused by something, then by all means post a thread and we can then try to help.
IMO, FTE isn't a substitute for doing your own homework.
IMO, FTE isn't a substitute for doing your own homework.
As you can see I am a supporter here and not just a leech trying to get info and run... Thanks for your 2 cents though..
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MSEE
Joined: Apr 2004
Posts: 10,386
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From: Austin, TX
That advice is completely useless, and has nothing to do with the issue. Don't tell someone to spend money on something if you have no logical reasoning to support your claim.
Dieseling is caused by a combination of the throttle plates being open too far when the engine shuts off (too high curb idle, or missing idle stop solenoid when required) and heightened combustion chamber temperatures (often caused by lean mixture and too steep of a timing curve).
If this engine was ever a "smog" motor with EGR, and it was removed without recurving the distributor, then that would likely be a heavy contributor to the problem. If the engine pings at cruise, then the two issues are related.
Dieseling is caused by a combination of the throttle plates being open too far when the engine shuts off (too high curb idle, or missing idle stop solenoid when required) and heightened combustion chamber temperatures (often caused by lean mixture and too steep of a timing curve).
If this engine was ever a "smog" motor with EGR, and it was removed without recurving the distributor, then that would likely be a heavy contributor to the problem. If the engine pings at cruise, then the two issues are related.
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New User
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That advice is completely useless, and has nothing to do with the issue. Don't tell someone to spend money on something if you have no logical reasoning to support your claim.
Dieseling is caused by a combination of the throttle plates being open too far when the engine shuts off (too high curb idle, or missing idle stop solenoid when required) and heightened combustion chamber temperatures (often caused by lean mixture and too steep of a timing curve).
If this engine was ever a "smog" motor with EGR, and it was removed without recurving the distributor, then that would likely be a heavy contributor to the problem. If the engine pings at cruise, then the two issues are related.
Dieseling is caused by a combination of the throttle plates being open too far when the engine shuts off (too high curb idle, or missing idle stop solenoid when required) and heightened combustion chamber temperatures (often caused by lean mixture and too steep of a timing curve).
If this engine was ever a "smog" motor with EGR, and it was removed without recurving the distributor, then that would likely be a heavy contributor to the problem. If the engine pings at cruise, then the two issues are related.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Pinging, or detonation, sounds like marbles rolling around in a coffee can. When it starts happening, it's not in sync with RPM; it literally sounds like marbles rolling around and is very sporadic.
If it ticks exactly in time with RPM, then there are a number of possibilities, one of which is an exhaust leak - however, many engines didn't come with manifold gaskets, so there are none to "replace." Regardless, it's impossible to go straight from "engine makes noise" to "replace manifold gaskets" without any information in between.
If it ticks exactly in time with RPM, then there are a number of possibilities, one of which is an exhaust leak - however, many engines didn't come with manifold gaskets, so there are none to "replace." Regardless, it's impossible to go straight from "engine makes noise" to "replace manifold gaskets" without any information in between.
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New User
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Pinging, or detonation, sounds like marbles rolling around in a coffee can. When it starts happening, it's not in sync with RPM; it literally sounds like marbles rolling around and is very sporadic.
If it ticks exactly in time with RPM, then there are a number of possibilities, one of which is an exhaust leak - however, many engines didn't come with manifold gaskets, so there are none to "replace." Regardless, it's impossible to go straight from "engine makes noise" to "replace manifold gaskets" without any information in between.
If it ticks exactly in time with RPM, then there are a number of possibilities, one of which is an exhaust leak - however, many engines didn't come with manifold gaskets, so there are none to "replace." Regardless, it's impossible to go straight from "engine makes noise" to "replace manifold gaskets" without any information in between.
Senior User
Joined: Aug 2010
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From: Sandy Level
That advice is completely useless, and has nothing to do with the issue. Don't tell someone to spend money on something if you have no logical reasoning to support your claim.
Dieseling is caused by a combination of the throttle plates being open too far when the engine shuts off (too high curb idle, or missing idle stop solenoid when required) and heightened combustion chamber temperatures (often caused by lean mixture and too steep of a timing curve).
If this engine was ever a "smog" motor with EGR, and it was removed without recurving the distributor, then that would likely be a heavy contributor to the problem. If the engine pings at cruise, then the two issues are related.
Dieseling is caused by a combination of the throttle plates being open too far when the engine shuts off (too high curb idle, or missing idle stop solenoid when required) and heightened combustion chamber temperatures (often caused by lean mixture and too steep of a timing curve).
If this engine was ever a "smog" motor with EGR, and it was removed without recurving the distributor, then that would likely be a heavy contributor to the problem. If the engine pings at cruise, then the two issues are related.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
The starter solenoid can keep cranking (not running) the engine if you've released the key from START and it's stuck. The OP's issue appeared when the OP tried to shut the engine off after running. Completely different situation.
