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7.3L light stumble, any ideas?

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Old 03-13-2012, 07:05 AM
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Default 7.3L light stumble, any ideas?

2000 F250 PSD 6sp. During warm up, I get a light stumble during even throttle driving. Doesn't happen when cold or completely up to temp. Accelerates and decelerates fine throughout cold thru fully warm. Any thoughts? I have lived with this for years but if it is an easy fix, I'll tackle it. Thanks! Randy
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Old 03-13-2012, 07:31 AM
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Put a scan tool on it but most likely a cam position sensor. 10mm wrench, on front of motor.

Buy the Ford part about $47 bucks and better then cheap parts store ones.

You do want to change it they will fail and leave u on the side of the road, I carry a spare with me.
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Old 03-13-2012, 07:43 AM
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Cam sensors usually cut out then die completely, check the valve cover harnesses to the injectors, measure resistance of each injector at the v cover connector, they use a common wire at the center of the connector and 4 signal wires, the smaller 2 on each side of center. If one is off pull the valve cover and ohm the harness
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Old 03-13-2012, 08:01 AM
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I'm with Red, sounds like an injector possibly. Also could be the EBPV, mine was awful until I took off the EBPV tube and cleaned it out.
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Old 03-13-2012, 11:40 AM
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Possibly a bad spot in the pedal assembly.
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Old 03-13-2012, 08:30 PM
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Code reader will tell you pretty quick.

I have lost 2 cam sensors, one failed the other stumbled for years (Factory one).

Just saying.

BTW

How many miles? Red, does that happen a lot? Sounds like you have dealt with it before?
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Old 03-13-2012, 09:43 PM
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Thanks for the suggestions!

Truck has 190K miles. It happens consistently.
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Old 03-15-2012, 05:15 PM
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Originally Posted by Wildman_grafix
Code reader will tell you pretty quick.

I have lost 2 cam sensors, one failed the other stumbled for years (Factory one).

Just saying.

BTW

How many miles? Red, does that happen a lot? Sounds like you have dealt with it before?
yes quite common, i'm a diesel tech so i see it a lot.
the glow plug wires get hot start to melt and end up melting the whole connector
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Old 03-21-2012, 12:19 PM
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So did u get it fixed? What was the problem?
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Old 03-21-2012, 09:18 PM
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Been swamped, haven't had a chance to look yet.
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