My 1997 F-150 after a short trip and after shutting it off for 10 minutes or so will not re-start. After sitting for ten or 15 minutes it will re-start and run fine. This is a intermittent problem. Engine is 4.6L V-8 with 5 speed man.trans.
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You need a local mobile auto electrician with a $5,000 pro grade scan tool computer. They can diagnose static issues but can also record exactly what happens to make the car shut off after 10 minutes and what happens 15 minutes later to make it start again. You can't guess issues like this on a car with so many computer modules and sensors.
When you put your key in, don't turn it all the way but to the point where everything powers up. You should hear a hum from the lower rear that lasts about 3 seconds. That's the fuel pump. If you don't hear that, it could be the fuel pump.
I have seen a few crank sensors do this. When I pulled them, they had a small crack in them. Don't know where yours is. But guessing under the harmonic balancer.
start the car let it run 4-5 minutes. shut it off , let it set 5 minutes check level, sometimes it takes 10 -15 time to get it to cycle all the air. even a short trip around the block a few times and always making sure to fill the reservoir. the new closed systems are a pain to get all the air out. also remember to have the heater on in full heat position to allow the system to circulate through the whole cooling system.
If you can duplicate the event in your driveway, you can check fuel pressure and spark at the plugs when it won't start to narrow down the possible causes.
Lookfor a light on the dash that says SECURITY or ANTITHEFT. If you see this light, that is a sign of a failed or failing antitheft system, which will disable your vehicle. This link explains
The car has to go through a certain number of driving cycles (start, drive, shut down) after the computer has been reset or the battery disconnected for an extended period of time before it will be ready, sometimes 50 or more depending on the vehicle. You could drive 1,000 miles and it wouldn't make a difference. Take your car on multiple short trips, around 15-20 minutes each, letting it sit for a while in between. Just starting and shutting down the car won't count either.
yes very much possible the ignition switch is getting Short so its causing the issue.Check the voltage at ignition switch.The power wire to the ignition switch harness are connected to battery and will give 12 volts.If there is no voltage then its loose connection.If there is short the voltage will differ.
---------thanks.Helpmech.
windshiled wipers will work on the intermittet stage for about 10-15 minutes then automatically goes to regular speed and will not shut off. When stop vehicle and shut engine off and let sit 15-20 minutes wipers will shut off. When needed again same thing will happen This is on a 2003 Chevrolwt express Va
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