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Old 08-05-2021, 06:40 PM   #1
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Ford 7.3 dies rolling to stop

Hi there recently purchased a 1997 fleetwood Southwind. Runs fine driving down highway, after approx 2 hrs driving on highway we rolled into town and at the first stop light the engine dies. Get the thing stopped and put into park starts right up. Next stop light same thing. Took it to shop they ran it for a hr and said it's all fine. They said fuel pump was 30-40 psi and the torque converter not locking up.
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Old 08-05-2021, 06:46 PM   #2
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I'd test the throttle position sensor. There should be about .5 vdcat idle, and about 4.65 vdc at WOT. You can check it with engine off, key on, and a multimeter on each wire on the TPS. If you are reading a lower voltage at idle, then the PCM can't command a proper idle.
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Old 08-06-2021, 07:57 AM   #3
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Quote:
Originally Posted by Kunzy777 View Post
Hi there recently purchased a 1997 fleetwood Southwind. Runs fine driving down highway, after approx 2 hrs driving on highway we rolled into town and at the first stop light the engine dies. Get the thing stopped and put into park starts right up. Next stop light same thing. Took it to shop they ran it for a hr and said it's all fine. They said fuel pump was 30-40 psi and the torque converter not locking up.
From your number of posts and this thread being moved from the Class A forum, I guess a lot of this is new to you.


Your 1997 Southwind doesn't have a 7.3 liter engine; that size is for the 2021 Ford V8 (and btw also an older Ford V8 diesel which Ford never put in their Class A chassis).


You have a 7.5 liter or 460 cu in V8, and if you change your subject line, you'll probably get more useful replies.


Based on your information, these symptoms are classic fuel pump on the way out.
Your shop should have driven it for an hour while monitoring fuel pressure under load; idling it is easier for them and tell them very little.


You should have the codes read. This engine uses the Ford OBD-1 system, with the connector under the doghouse in the engine compartment. They are also capable of logging useful codes while not lighting the check engine light. Autozones do not have readers to read OBD-1 systems.


And if this happens to you a lot, you should know that like most automatic transmissions made in the past few decades, the engine can be started in Neutral as well as in Park, so you don't need to get it stopped to restart the engine.
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Old 08-06-2021, 08:07 AM   #4
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I had a bad fuel pump relay act like that once on a 2009 F53
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