Can anyone plese explain the difference in the 1999 injection and the 2000 and newer injection? I was told that the '99 will not get good fuel economy due to this injection thing.

Any truth to that? Anyone have a stock 1999 Powerstroke Turbo Diesel (manual tranny) that can fill me in on what to expect fuel economy wise? Anyone know the difference in these injectors from that year to the next or from whenever it was changed?

I really appreciate any and all help. I'm buying my first F250 and coincidentally my first diesel, would like to know what I'm getting into.

Also, there is a 2001 7.3 with an automatic tranny for $5400. Supposedly nothing is wrong with it but that cost is near half of the KBB value. I haven't gotten a chance to test either of these out but I will within a day or two. Any insight on the automatic would be appreciated as well, such as how long the tranny might last if it was not abused.

Thanks.

 

The difference is actually only in the early-99's... late-99's and newer are all the same. There are several differences, but the biggest differences are going to be the injectors, HPOP (high-pressure oil pump), and turbo. Everything is a little smaller with the early-99's, but not all that much. The early-99 has 130cc injectors (supposedly 120cc, but they actually flow more like 130cc) and the late trucks have 140cc injectors. The early-99's have a 15* HPOP and the later tucks have a 17* HPOP. What's being measured in degrees is the angle of the swash plate in the pump to the shaft. Also, the early-99's have a slightly smaller turbo that is also a good deal louder whistle-wise than the later trucks. While the later trucks don't whistle as much, they're prone to surge. Automatics aren't bad if you give them a valve body (shift kit, just already installed) and really good custom tuning. Stock, it really depends... what the truck was used for as well as what the year of the truck is can affect it (some PCM's had better flashes than others throughout the years). My original transmission lasted about 225K before it died of a cracked pump housing. You just have to drive the trucks to find out, but some people don't realize what they have. As for mileage, most guys with early-99's get VERY good mileage outta their trucks. It really depends on the condition of the motor. Boost leaks on both the compressor and exhaust sides, high-pressure oil leaks both internal (injector O-rings) and external (HPOP O-rings), as well as the state of various sensors and regulators will all have an affect on that. Hope this helps!

 

The Early 99's had AB code injectors and a smaller degree swashplate high pressure oi pump. the AB's flow like 130cc of fuel per 1000 where as the AD injectors in 2000-2003 flow 140CC. They also have a little different turbo setup.

I average around 15mpg, and I think that is pretty much the norm on a 4WD crew cab. Some 2WD sticks get higher teens though. Nothing to do with injection system differences.

Here is a great resource...7.3 Buyers guide

Here is a brochure on the differences between E99's and later

19995DITEngineUpdate.pdf

 

2001 model year automatics could have the mechanical diode....which you want to avoid if possible. If the purchase price is so low that you are left with about $4k in your pocket for a new trans then it might be a good candidate.