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1994.5 - 1997 7.3L Power Stroke Diesel  

Hard Right Turn

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Old Apr 26, 2018 | 08:54 AM
  #1  
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Hard Right Turn

Yesterday Evening on my way home I needed fuel, I almost past the last gas station and made a pretty swift and fast right turn into the parking lot of the gas station. The truck "calmly" died. I started it up drove to the fuel pump, turned it off, fueled up, started it up and drove about a mile down the rode and it "calmly" stalled again. Started it back up and drove it about 15 miles home without any issues. Parked it overnight and tried starting it for work this morning with no luck.It turns over and it actually sounds like the starter is turning faster than normal. I haven't had time to take a look at it at all but was hoping to get some suggestions to look at for when I get home this evening. Also when I say "calmly" I mean there was no spitting or sputtering, it just slowly shut down and the throttle had no response or anything.
 
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Old Apr 26, 2018 | 09:03 AM
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When mine 'calmly' shut down the IDM went bad. But, it could be a sensor or PCM. Can you get the codes, if any?
 
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Old Apr 26, 2018 | 09:11 AM
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I haven't had a chance to read codes and nor do I have a code reader. Can they be rented or borrowed from local auto parts stores?
 
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Old Apr 26, 2018 | 09:48 AM
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From: Bahstun
Engine will not start flow chart, print it and keep in glove box!
https://drive.google.com/file/d/0Byb...1qRU1VVGc/view



most readers at stores wont work on this older style system

an ap and an android device is a great tool to have

scanner to monitor your engine

https://www.amazon.com/Vgate-Bluetooth-Scanner-TORQUE-ANDROID/dp/B00AAOOQJC/ref=sr_1_1?ie=UTF8&qid=1473776759&sr=8-1&keywords=vgate+OBD2 https://www.amazon.com/Vgate-Bluetooth-Scanner-TORQUE-ANDROID/dp/B00AAOOQJC/ref=sr_1_1?ie=UTF8&qid=1473776759&sr=8-1&keywords=vgate+OBD2

Torque Pro
https://play.google.com/store/apps/d...g.prowl.torque

Use the communication in the profile
SAE J1850-PWM

make sure you add in Ford PIDs

https://play.google.com/store/apps/d...ch.CarGaugePro

people like it cause it will pull codes, buzz test and CCT

Warning, Some OLD PCM's have to be flashed before you can pull codes
 
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Old Apr 26, 2018 | 02:50 PM
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Ive ordered the bluetooth scan tool hopefully it'll read whats going on. I use the flow chart for the rest of my life. What a great tool. Thanks for that. I plan on checking my fuses, and my fuel bowl first. If my fuel bowl is low of fuel how do I eliminate the fuel tank selector switch being the issue?
 
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Old Apr 26, 2018 | 03:41 PM
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From: Bahstun
If bowl is low, check the suction hoses under the hood. tiny leak means air and no fuel

make sure it has more than 1/4 full in fuel tank, shower head breaks a lot on these

can run hoses around the switching valve to rule it out or use a hand vac pump to see if you can suck some fuel from the valve
 
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Old Apr 26, 2018 | 05:00 PM
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I got home and went buy the flow chart. The wait to start light comes on. Seems to be normal amount of time. Tach meter gets up to about 200 rpm. The fuel bowl is completely full .The oil is topped off .I looked around for loose sensors or wires and haven't seen any. Any more ideas? I can't read any codes until that scanner gets here.
 
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Old Apr 27, 2018 | 10:31 AM
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From: Bahstun
what is fuel pressure while cranking?
does oil pressure gauge read anything while cranking and come up fast?
Could try swapping CPS, not a bad idea to have a spare and 10mm wrench in glove box.
 
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Old Apr 27, 2018 | 11:28 AM
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I'll have to do some research on how to check the fuel pressure, that's something I have never done before. Any good videos or how to sheets on that?

The oil pressure gauge has always went from dead zero to half way in the gauge.

I've read about the CPS and planned on changing it out just to try.

This is my first diesel truck(other than 10 years of Army Humvees as an operator) and I've been told I got one of the best. I'm trying to learn as much as possible because its just not the same as a SBC.
 
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Old Apr 27, 2018 | 12:27 PM
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From: Bahstun
tire pressure guage 0-100 PSI and press it on the fitting on fuel bowl while cranking engine

oil pressure going to half way in a few seconds? remember its just a switch and not pressure
 
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Old Apr 27, 2018 | 12:33 PM
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Originally Posted by knottyrope
tire pressure guage 0-100 PSI and press it on the fitting on fuel bowl while cranking engine

oil pressure going to half way in a few seconds? remember its just a switch and not pressure
The oil pressure gauge has always jumped up to halfway instantly after starting the engine. I'll have to take a look and see if it does anything while trying to start.

I'll also try the fuel pressure gauge tonight.
 
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Old Apr 27, 2018 | 02:59 PM
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The oil pressure gauge is just a idiot gauge in that 6psi of oil pressure activates it to jump up to halfway. You'll have to install a 'real' gauge to see what its reading.
 
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Old Apr 27, 2018 | 05:18 PM
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Replaced the CPS it fired right up .Thanks guys. You gave a lot of good tips that'll I'll keep in mind.
 
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