Engine Won't Shut Off?
Thread Starter
|
New User
Joined: Feb 2012
Posts: 3
Likes: 0
Engine Won't Shut Off?
My boyfriend recently purchased a 1966 F100 Twin I Beam;
It drove just fine for a couple of days, then what we thought at the time was the starter going out fixed the problem. Once we replaced it, drove just fine until it tried to go a long distance, it would die if he stopped too long and he'd have to gun it pretty hard to keep it going.
When he got home and went to turn the car off after the long trip, he took the keys out totally and the engine was still running. Unhooked the battery--engine still running. We had to disconnect the start solenoid to get it to shut off. We thought maybe it was bad, so we replaced it. And it wouldn't crank. Well--we checked the starter and it had burned up; we put the old one back in because it would still turn over. Truck cranks but when we crank it, it still keeps trying to turn over, the ignition will not disengage. We tried replacing the ignition switch, still no go.
Any ideas on what it could be?
I'm guessing it's a wiring issue--
He's really hoping otherwise.
Any ideas will be greatly appreciated.
It drove just fine for a couple of days, then what we thought at the time was the starter going out fixed the problem. Once we replaced it, drove just fine until it tried to go a long distance, it would die if he stopped too long and he'd have to gun it pretty hard to keep it going.
When he got home and went to turn the car off after the long trip, he took the keys out totally and the engine was still running. Unhooked the battery--engine still running. We had to disconnect the start solenoid to get it to shut off. We thought maybe it was bad, so we replaced it. And it wouldn't crank. Well--we checked the starter and it had burned up; we put the old one back in because it would still turn over. Truck cranks but when we crank it, it still keeps trying to turn over, the ignition will not disengage. We tried replacing the ignition switch, still no go.
Any ideas on what it could be?
I'm guessing it's a wiring issue--
He's really hoping otherwise.
Any ideas will be greatly appreciated.
Senior User
Joined: May 2010
Posts: 199
Likes: 2
From: Southeastern Michigan
Sounds like you could have a mixture of problems. These vehicles do not need the battery to run if the alternator is charging.
It sounds like you have a short somewhere. By ignition switch did you actually pull the ignition assembly out of the dash to make sure the wires are not shorted out?
Did the starter by chance short out and stick to the flywheel causing it to burn up?
If it's a stock v-8 it is a 352FE and inline i believe would be the 300.
It sounds like you have a short somewhere. By ignition switch did you actually pull the ignition assembly out of the dash to make sure the wires are not shorted out?
Did the starter by chance short out and stick to the flywheel causing it to burn up?
If it's a stock v-8 it is a 352FE and inline i believe would be the 300.
Thread Starter
|
New User
Joined: Feb 2012
Posts: 3
Likes: 0
We pulled the whole ignition out, checked all the wires--and the fly wheel is brand new, we checked it when we changed the starters back out. I'm thinking it's a short too. Just narrowing it down is the hard part. He could re-wire it, he's just in the Army and Thursday leaves back for Afghanistan.
Elder User
Joined: Oct 2011
Posts: 795
Likes: 0
This is for a 67 but should close or the same.
http://www.fordification.com/tech/wi...ing-gauges.jpg
Ok may be a long shot but could the voltage reg. be bad and cause the relay to malfuncation?
http://www.fordification.com/tech/wi...ing-gauges.jpg
Ok may be a long shot but could the voltage reg. be bad and cause the relay to malfuncation?
Tuned
Joined: Dec 2004
Posts: 340
Likes: 8
From: Rock Hill, SC
I had this problem. The starter would drag when the engine was warm. The truck would not shut off sometimes when you turn off the switch and I would have to pull the wire off the "I" terminal on the solenoid to kill the engine.
The problem ended up being a bad diode in the alternator. It would back feed the ignition circuit through the solenoid. After the alternator was rebuilt the starter worked fine even warm and the truck always shuts off with the key.
The problem ended up being a bad diode in the alternator. It would back feed the ignition circuit through the solenoid. After the alternator was rebuilt the starter worked fine even warm and the truck always shuts off with the key.
Trending Topics
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
You guys are responding to a two year old post. Hopefully the guy has completed his tour and is enjoying his truck.
John
John
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
Tonto Kowalski
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
11
Feb 2, 2022 08:06 PM
kimak1970
1961 - 1966 F-100 & Larger F-Series Trucks
11
Jul 11, 2013 11:24 AM
trucking79
1973 - 1979 F-100 & Larger F-Series Trucks
9
Nov 24, 2004 02:56 PM
thelakecrew
Bronco II
5
Jan 10, 2002 09:21 PM
