[Shawn MacAnanny]

I'm thinking of possibly swapping in some new injectors, there aren't any real issues, truck starts fine and runs fine but I seem to only be getting 15-16mpg with mostly highway driving. I am not sure how old either the injectors or pump are, they aren't painted gray so I would assume they have been replaced at least once. Truck has 194k on it.

Can you switch out 8 injectors without replacing the injection pump? I read somewhere you should time the injection pump after installing new injectors?

What would you recommend to ensure my truck is running as efficiently as possible? I'm not so concerned about the fuel savings so much as extending the life of the engine.

The brakes are all new and adjusted as are the parking brake cables, new tie rod ends steering box, alignment new stock sized tires, new intake, turbo, rotella t6 5w 40 with powerstroke filter, 3" downpipe and 4" exhaust with no muffler, red line atf in trans and red line 75w140 lightweight shockproof mix in rear axle. The truck is a crew cab 2wd with a utility bed and weighs around 8,000lb with tools and tommy gate

 

[Bill1013]

It would help answering your questions, put your truck info in your signature.

Yes, the IP should be timed any time the injectors are replaced. The injectors should be pop tested before installation, even new ones before timing. NA engines are timed at 8.5* to 9.5* BTDC, turbo engines are timed at 10.5* to 11.5* BTDC. Timing is at 2000 RPM by the pulse method.

Pop testing, the injectors are set to 1850 to 2000 PSI, the 1850 PSI is nominal for an "old" IP.
As far as changing the IP, only a couple thousand miles after an injector change would dictate that. Your 15-16 MPG is about the average. If you have an increase in MPG or power seems to increase, then I'd say the IP is golden.

New BB or G code injectors are what you should use. So called rebuilt/remaned injectors are a gamble depending where or from whom you get them from.

What would you recommend to ensure my truck is running as efficiently as possible? I'm not so concerned about the fuel savings so much as extending the life of the engine.

Injectors and IP's don't have much to do with engine life, they are dispensable just like spark plugs in a gasser. Oil changes are the life blood of any engine.

 

[Shawn MacAnanny]

Sorry, i dont think my signature posted because i posted it from mobile. It's a 1993 Ford F350, 7.3L IDI factory Turbo, 2wd, ZF5 speed, 4.10 gears.

I was looking at possibly the Moose injectors from Conestoga Diesel since they seem to test the injectors. So i should get a Ferret meter and timing light when i do them? Would you recommend replacing an injection pump at the same time?

I was reffering to the possibility of one cylinder being over fueled or under fueled due to a faulty injector that may go undetected.

What intervals are you changing your oil at? I am using Rotella T6 synthetic 5w 40, and a Napa gold Filter, but will be changing to K&N on the next oil change. I am using the Powerstroke filter since it's high capacity and i hear a filter filtering rate.

 

[LMJD]

Having actually worked on all breeds of diesels full time for a living, myself and others have replaced countless injectors and never checked the timing when doing so or preached about replacing the IP at the same time. You can change injectors without affecting the IP and vice versa.

 

[Bill1013]

Sorry, i dont think my signature posted because i posted it from mobile. It's a 1993 Ford F350, 7.3L IDI factory Turbo, 2wd, ZF5 speed, 4.10 gears.
You have to go into your "User CP" and Edit your sig to show up at the bottom of a post.

I was looking at possibly the Moose injectors from Conestoga Diesel since they seem to test the injectors. So i should get a Ferret meter and timing light when i do them? Would you recommend replacing an injection pump at the same time?
That is a good choice for injectors and IP's. Injectors and IP's are getting expensive. Since they have been replaced, I would just get the injectors pop and spray pattern tested. Your MPG, up or down, would tell you if the IP should be changed, also the timing. Ferret and a good timing lite is expensive, Ferret is $180 and a Actron T-Lite is about $100.

I was reffering to the possibility of one cylinder being over fueled or under fueled due to a faulty injector that may go undetected.
As above, pop testing.

What intervals are you changing your oil at? I am using Rotella T6 synthetic 5w 40, and a Napa gold Filter, but will be changing to K&N on the next oil change. I am using the Powerstroke filter since it's high capacity and i hear a filter filtering rate.

Oil and filter are a good choice. Some say Delo400 Syn is better. Lots of Pro's and Con's of which oil Brands are better.


On the Oilburners forum, there are a lot of guys that offer timing, depending on where you live.

 

[chuckster57]

Bill, if your using a mobile app like Autoguide it doesn't show signatures, or allow you to create one.

 

[Bill1013]

I don't use any mobile apps myself, just an old Dell with Win 10 on it now.

 

[Shawn MacAnanny]

Be sure to adjust your privacy settings on Windows 10, it now reports your location, and acts as a server for all other Windows users to download windows 10 updates, sort of like how Limewire and Morpheus used to share music/files.

 

[Bill1013]

Thanks. I'll do that. Damn software companies and there hidden stuff.