I've tried searching and had no luck as to fixing the problem.

It's a 99 f350 7.3 diesel powerstroke. About 180k miles I think.

It cranks fine. I just changed the glow plugs(all were dead) but when you try and start from cold, it takes about 7-10 seconds to fire.
The oil res is full, tried disconnecting the EOP sensor, still fires up and takes just as long. There is one near the oil filter, and that seems to not be it either.

Doesn't smoke, no oil leaks that I know of. Not sure what else to check before sending it to another shop to get put on a diagnostics machine.

I read about the IPR, but it has no problems when running. Only problem is a very long time to start.

Also changed the fuel filter.

 

I am sure you've been through some of this. Nonetheless, here it is:

HARD START/NO START DIAGNOSTICS

**NOTE: A hard start/ No start concern with EOT Temp. Below 60F perform step 10 first.

Tools: Fuel Filter Cap Removal Tool / Flash Light / Tools Flash Light / White Bond Paper / Stop or Wrist Watch w/Secong Hand Sweep / DVOM

Step #1: Visual Engine/Chassis Inspection

Tools: Flash Light

Fuel Oil Coolant Electrical Hoses Leaks Check

Tools: White Bond Paper

Step #2 Check for contaminates Correct Grade and Viscosity Miles/Hours on oil, correct level.

Step #3 Intake/Exhaust Restriction

Tools: Flash Light

Inspect air filter and ducts -exhaust system / Inspect exhaust back pressure device

Step #4 Sufficient Clean Fuel

Tools: Fuel Filter Cap Removal Tool

a. Check if the WATER IN FUEL lamp has been illuminated.

b. After verifying that there is fuel in the tank, drain a sample from fuel filter housing at key on.

c. NOTE: Fuel pump will run for 20 sec. at key on

Step #5 Electric Fuel Pump Pressure

Tools: DVOM / Fuel Port Adaptor and Pressure Gauge 0-160 PSIG

a. Verify that the fuel pump has voltage and gnd. present at key on.

b. Measure fuel pressure at the Fuel Bowl Test Port key on.

c. Instrument Spec. 45 PSIG min. / WOT Under Load =/> 42 PSIG.

* If pressure fails low, go to step 8c on the Performance side of this sheet to identify cause

Step #6 Perform KOEO On Demand Test

Tools: OBD-II On-Board Diagnostics, Phase 2 Vehicle Media Communications Unit (Scanner)

DTCs set during this test are current faults.

Note: IDM DTCs displayed here could be current or historical faults

Step #7 Retrieve Continuous Trouble Codes

Tools: OBD-II On-Board Diagnostics, Phase 2 Vehicle Media Communications Unit (Scanner)

DTCs retrieved during this test are historical faults. Note: IDM DTCs are cleared when codes are cleared.

Step #8 KOEO Injector Electrical Self-Test

Tools: Bi-Directional Scan Tool.

a. All injectors will momentarily buzz, then individual injectors will buzz in sequence 1 through 8. IDM DTCs may be transmitted after
test is completed.

b. Note: IDM DTCs may be historical if not cleared above.

Step #9 Data List Monitoring

Tools: OBD-II On-Board Diagnostics, Phase 2 Vehicle Media Communications Unit (Scanner)

1. Select the parameters indicated from the NGS parameter list and monitor while cranking engine.

Parameter/Spec:

a. V PWR / 10.5 volt min.

b. RPM / 100-150 RPM minimum

c. ICP / 500 PSI or 3.4mPa min.

d. ICPv / 0.25v – 0.30v

e. FUEL PW / 1 mS to 6mS

* V PWR -If indicating a low voltage condition, check battery voltage, charging system or power and ground circuits to the PCM. GO TO
PINPOINT TEST A

* RPM -Low RPM could be an indication of starting/ charging system problems, RPM indicated with the engine cranking -could be CMP circuit
fault, check for Diagnostic Trouble Codes. GO TO PINPOINT TEST DG

*ICP -A minimum of 500 PSI (3.4 mPa) is required before the injectors are enabled. No or low oil in the reservoir, system leakage, injector O-Rings or faulty IPR could cause pressure loss.

*Go to section 4 step 9c in the PC/ED Manual for a detailed description on how to perform this test. Note: If no RPM signal is received, IPR duty cycle will default to 14%

*FUEL PW -Even though a 1 to 6 mS FUEL PW is shown, it’s possible the IDM did not receive the signal due to a CI or FDCS circuit fault or
internal IDM failure.

Step #10 Glow Plug System Operation

Tools: DVOM / Stop or Wrist Watch w/Secong Hand Sweep

a. Glow Plug ON time is dependent on oil temperature and altitude. The Glow Plug relay comes on between 1 and 120 sec. and does not come
on at all if oil temp is above 131 F.

b. Verify that B+ is being supplied on the large BK/W wire going to the Glow Plug relay.

c. Install a voltmeter to the glow plug feed terminal (two brown wires or center terminal on the shunt).

d. Using a Bi-Directional Scan Tool and EOT PID’s, verify glow plug "on" time.

e. Turn key to run position, measure voltage ("on “time) (Dependent on oil temperature and altitude) Relay on time Spec. Measurement 1 to
120 seconds B +

f. Note: Wait to Start Lamp "on" time (1 -10 sec.) is independent from Glow Plug "on" time

g. Glow Plug Resistance

h. Remove both 9 pin connectors from valve covers • Measure each Glow Plug resistance to Bat. Ground. Measure engine harness resistance to
relay. .1 to 2 ohms

i. Glow Plug Connector to relay 0 to 1 ohms

FRONT
#2 #1
#4 #3
#6 #5
#8 #7

*Add 5 seconds to glow plug on time when above 7000 feet in altitude, but not to exceed 120 seconds.

Tom

 

Tom's post above is worth reading twice...after that, a couple questions:

1. When you say "cold," do you mean only in the mornings after it's sat all night, or anytime during the day after it's been sitting for 3-4 hours? Or do you mean when the temp outside is below, say, 40 degrees?

2. You mentioned all your glow plugs were dead and you replaced them. Have you checked your GPR (Glow Plug Relay)? If it's dead, doesn't matter how your glow plugs are. It's a cheap and simple replacement, but don't throw parts at the problem without diagnosing the GPR first (lots of threads on the forum).

3. You said "oil reservoir" is full...do you mean you are simply checking your dipstick level, or are you checking the HPOP reservoir on top? Because if the answer is "Dipstick measurement" and the answer to question #1 is, "In the mornings regardless of outside temperatures"...you may need to check your HPOP reservoir one morning before cranking. If it's low, you could have a "leak down" issue where your low pressure oil pump is slightly draining the HPOP due to the LPOP being worn out. A Melling LPOP is about $90, but it's several hours of labor with a few specialty tools to get it done. Not to go off on a tangent, but changing LPOP, water pump, and harmonic balancer are nice to do all around the same time IF POSSIBLE, as you won't have to duplicate efforts of removing radiator fan, etc. Just a thought.

 

how old are the battery's?