Just need help, please

[Chuck Diggity]

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

[nra1ifer]

Is this a new-to-you truck, or have these problems just started?

[Chuck Diggity]

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

[forddieseldoctor]

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.

[nra1ifer]

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.

[forddieseldoctor]

Originally Posted by nra1ifer

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.

[nra1ifer]

Originally Posted by forddieseldoctor

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.

[Schnot]

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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