Just need help, please - Ford Powerstroke Diesel Forum
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post #1 of 8 Old 07-14-2012, 04:13 PM Thread Starter
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Just need help, please

97 f350 7.3 D.I. turbo, automatic trans

On start up it idles very rough, shakes heavily, at one point in time I pulled a dtc for the exhaust back psi sensor, I cleaned out the carbon build up but cant be sure if its helped at all.

Shifting is hard at different times, not always 1-2, sometimes 3-4 others is 2-3.....always different.

I'm pretty skilled with gas engines, when it comes to diesel I'm just dumb, I need some basic tests I can do, somewhere to start because I am just plain lost.

Thanks a ton, btw my name is Chuck, live in South Florida, I'm the FNG
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post #2 of 8 Old 07-14-2012, 04:55 PM
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Is this a new-to-you truck, or have these problems just started?

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post #3 of 8 Old 07-14-2012, 07:03 PM Thread Starter
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new to me truck, its not being driven much I bought it to tow a camper, my wife uses on occasion and says its getting worse
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post #4 of 8 Old 07-14-2012, 07:14 PM
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If you have a scanner do an injector buzz test and if that doesn't show anything then do a cylinder contribution test. If it's running rough then either one of those should show something. These motors are know for burning up the connectors for the valve covers. The harsh shifting may being caused by the run-ability issue.

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post #5 of 8 Old 07-14-2012, 08:26 PM
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I'm definitely not nearly as qualified to comment as forddieseldoctor is, but if you haven't done so already, I'd suggest changing the oil and filter, drain the fuel filter bowl and replace the fuel filter, and change the transmission fluid and filter........ then see how it runs after that. Take care of the basics first.

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post #6 of 8 Old 07-17-2012, 06:17 PM
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Quote:
Originally Posted by nra1ifer View Post
I'm definitely not nearly as qualified to comment as forddieseldoctor is, but if you haven't done so already, I'd suggest changing the oil and filter, drain the fuel filter bowl and replace the fuel filter, and change the transmission fluid and filter........ then see how it runs after that. Take care of the basics first.
Everyone is qualified here. That's the beauty of the internet. You can get a bunch of different opinions very quickly.

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post #7 of 8 Old 07-18-2012, 12:20 AM
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Quote:
Originally Posted by forddieseldoctor View Post
Everyone is qualified here. That's the beauty of the internet. You can get a bunch of different opinions very quickly.
I appreciate that.... thx. I'll be interested to see if/when we hear how things are going with this one.

I based my comment on "Ford Senior Master Diesel Tech" in your post.

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post #8 of 8 Old 07-18-2012, 01:42 AM
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What he said. Change the fluids and especially the fuel filter. Don't flush the tranny though. I've had bad luck with them after a flush.

If that don't help then I'd go ahead and change the injector harnesses if they've never been done. And since you're in there put new glow plugs in. The passenger valve cover is a pain to get off so you don't want to do it more than once.


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