08-05-2007, 08:29 AM
I'm new to the forum and to I'm just purchasing my first 99 F350 xl..
I wondering what is the difference between the early 99's and the late 99's I've seen it mentioned a few times.
The 99 I'm buying is in decent shape but has rather high kilometers 300,000.. seems to run well other then a strange sort of flat spot around 2000 rpm but if you mash the peddle to the floor it picks up fine. that and the rear axle needs a complete overhaul... It's a 6spd manual extra cab and I'm paying about 12 grand Canadian (not alot of difference now days) so judging by whats out there even with a few repairs I'm doing ok..
Anyone has any insight on the question or comments on things to watch for on these trucks.
Thanks, look forward to using this forum..
08-05-2007, 06:24 PM
Several years back I had asked a similar question. I took all the responses and save in an accumulated file. Here it is, with little editting:
There are a few ways to tell the difference between a 99 and a 99.5. First a 99.5 does not have a catalytic converter. Second there will be two relays mounted on the right front corner of the engine on 99.5. Also there is a label on the left valve cover that has a date on the bottom of it. That date is the engine build date, 99.5 engines were built after Jan 1 1999.
Here it is on Official Navistar Letterhead, nothing is confidential so it can all be posted.
"All changes listed in this TSB are for serial number 896812 and above unless otherwise noted."
"1999.5 Ford Changes are as follows:"
Turbocharger, "The turbocharger has been changed to improve efficiency. The diameter of the compressor outlet and the size of the compressor have increased to improve air flow capabilities of the turbo. Due to the increase in size, the new turbo is mounted on a taller pedestal to provide adequate clearance. A new exhaust inlet adapter has been designed to allow access to the fuel pressure test port at the rear of the head. The new exhaust inlet requires new exhaust up-pipes. The Econoline uses the new larger, taller turbo without the wastegate or charge air cooling provisions."
"A new CAC crossover has been developed for the new turbo and incorporates a PCM controlled intake air heater. The heater is installed in the air inlet to the engine(after the charge air cooler)side of the CAC crossover. On the Econoline the heater is in the "Y" pipe downstream of the turbo. The new intake heater is used to heat the air before it reaches the combustion chamber in the engine during cold startup to reduce cold (white) smoke. Current to the intake heater is switched on/off by a PCM controlled relay, similar to the glow plug relay. In order for the relay to be activated the following conditions must be met: fast idle must be engaged, glow plugs must be off, PCM voltage must be between 11.8-15 volts, EOT (engine oil temp) must be below 55ºC, and engine speed must be above 1000RPM. In order for fast idle to be engaged the following conditions must be met:, the vehicle must be in park for an auto and neutral for a manual, the parking brake must be set, EOT must be below 70ºC, IAT (Intake Air Temp)must be below 0ºC for 1000 RPM & -10ºC for 1100 RPM, brake pedal must not be depressed at anytime, and accelerator pedal must be at idle. A 90º fitting for the MAP hose has also been installed so that a common straight MAP hose can be used for both the F-Series and Econoline. With the increased turbo height and repositioning of the wastegate solenoid the wastegate hoses have also changed to fit the relocated components."
"The glow plug relay bracket has been modified to mount the intake air heater relay."
"Both the Econoline and F-Series use a new intake cover with 3"(instead of 2") inlets into the heads for better flow to the combustion chambers. The new cover has had no modifications to length or bolt pattern. With this change, the CAC to intake hoses are now straight with 3" diameters on both ends. These hoses have no hump between the two components. On the non CAC Econoline engines, an aluminum "Y" pipe with 3" inlets and outlets is now used."
"Due to the changes in turbo height, the turbo air inlet duct for both the Econoline and "F" series have changed."
"A new injector has been released with the following changes:
-Low mass poppet to increase effiency and lessen noise,
-Tungsten Carbide coating on the injector plunger and barrel. This coating lessens the chance of injector damage caused by low lubricity fuel and water,
-the annualer grove that is cut into the plunger is wider than in previous models so that the time between first and second shot of injection is increased, this helps emmisions."
"Due too the injector changes a new high pressure oil pump is being used. The new pump has a higher flow rate(from 6.8cc per revolution to 7.2cc).
NOTE:THE NEW INJECTORS AND/OR PUMP CAN NOT BE USED IN PRE-1999.5 ENGINES AND PRE-1999.5 PUMP AND INJECTOR CAN NOT BE UTILIZED IN 1999.5 AND NEWER ENGINES."
"A new fuel pressure regulator was incorporated during the 1999 model year. The new regulator has a brass poppet valve with a captured seal made of improved material. Regulator poppet seal failures will cause low fuel pressure and increased engine noise. Fuel pressure on all Powerstroke engines built since 1/1/98 or Serial #661496 should be 51 +/- 4.5psi @ idle. The fuel lines have been modified for the new 3" intake covers."
"If a leak occurs at the high pressure oil gallery plug, a service plug for the high pressure oil rail that places the sealing o-rings deeper into the gallery is now available. The new plug can be identified by a circular groove cut into the face of the plug. The new plug went into production prior to 1999.5 engine."
Well there you have it, I just came in to cool off and read some posts and look what happened. As for HP, no official word, but the larger intake might cause some increase. Engine builders don't like to show an increase in Power because they have to go through all the EPA BS again. All the internal engine changes occured with the new Super Duty intro. Block, Crank, Pistons, Fuel System, Split-Shot injectors and wastegate. There were pictures too, but I can't load those.
The 99 has a 15 degree high pressure oil pump (HPOP) and the 99.5 uses a 17 degree HPOP.
Quieter turbo with less compressor inertia
New Intercooler with less pressure drop
No catalyst in the exhaust
Higher capacity injector pump
Revised aircleaner to resolve issue w/'99s
Revised glow plug relay(better seal from elements)
Manifold intake air heater (less smoke when cold
and allowed deletion of catalyst/backpressure)
Other than that I think they are the same.
Model Year 1999
Beginning in early 1998, Ford Motor Company began selling the "Super Duty" truck which replaced the older generation F250HD and F350. In addition, the F450 and the F550 was added to the line up to create a wide range of options for the light to medium light duty truck buyer. With the 99, a new generation of Powerstroke engines from Navistar debuted in the new truck that were more fuel efficient and quieter than their previous generations. 1998 Calendar year sales of the 1999 model and all remaining 98 stocks totaled just under 150,000 units in the diesel model alone. With very little competition from GM' Diesel and moderate competition from Dodge Ram Cummins line of diesels, the Super Duty had a field day. The main reasons? It was a Ford Product and many a die hard bought the new model, it was the only crew cab diesel offered, and its design converted many owners of other brands.
July 1999 (est)
Number of units made
Unknown at this time
Model Year 1999.5
It really isn't a model year officially, but FoMoCo updated the engine and truck a little bit for better or worse.
Changes for the 1999.5:
· Fender badge for the PSD removed, door badge added.
· Lumbar seat deleted
· New front-intake "cool-box" air filter box (Older models retrofitted to this style)
· New down pipe
· Bed body side molding removed.
· Passenger side airbag standard across the line
· Passenger lumbar removed
· "Superduty" added to the rear tailgate badge for 350
· Larger turbo
· Catalytic converter removal
· New injectors
· Lower restriction intercooler
While most of the engine and power train specific items happened around 12/1/98 - 12/8/98, many of the "little things" such as the lumbar and badging happened at different times. If your truck was made after 12/8/98, You definitely have a "1999.5."
Most of the powertrain components were changed due to emissions. Other changes were to cut costs, for better or worse.
Model Year 2000
The 2000 brought a little change to the truck. No exterior changes were made but a few new colors could be had. The V-10 version of the truck got a power upgrade to 300hp while the PSD and 5.4L remained unchanged. A few new options came about, the most notable were telescoping trailer mirrors, allowing the owner to retract the mirrors for better fit into tight spaces. Along with this neat toy, dual alternators became available to the general public. Other options became standard on the XLT and Lariat models. A new trim level, Lariat LE, debuted with wood grain, two rows of captain chairs, and special options such as custom paint scheme and embroidered floor mats.
Number of units made
Normal Operating Parameters
Note: Avg. Fuel Economy has been left out since models widely vary. However, 16-21 is decent range for all models to fit in.
Fuel Tank Capacity
29 / 38 g
29 / 38 g
Cooling System Capacity
Exhaust Temp (Max ~1300° F Before Turbo)
Without Chip (Before/After Turbo)
600-900° / 500-700° F
600-900° / 500-700° F
With chip (Generic Mdl. B/A Turbo)
900-1200°F / 700-900° F
900-1200°F / 700-900° F
Transmission Temperature (Max ~215° F)
Unloaded, Normal/Stop & Go
140° F / 175-200°F
140° F / 175-200°F
Boost Levels (Max ~25 Psi, Check Engine light may illuminate beyond this level)
At Idle, No Chip
At Idle, With Chip
At 70+ MPH, No Chip
At 70+ MPH, With Chip
Oil Consumption (If any...)
1 q/3000 miles
1 q/3000 miles
* Some early production vehicles have 14 quart pans
08-05-2007, 07:14 PM
The biggest thing to watch out for on the 99's is the airbox. Look it over real careful and if you find the air box to be cracked replace it immediately. Look to see if it fits poorly. A lot of the 99's airbox can allow dust and dirt to be pulled through into the engine. Resulting in a "dusted" engine. Basically, you'll need a new engine.
08-05-2007, 08:14 PM
Only thing I see wrong with that is the boost levels at 70mph.
No way they're actually that high cruising empty. More like 6-8lbs.
08-06-2007, 04:48 AM
Thanks for the info, I should have my truck here this week. Pretty sure it's a 99.5 judging by that info.