My friend bought a truck recently but its got some problems. Maybe the
collective mind can help him and me fix it.

Truck in question is a 1997 Chevy Dually with 6.5T and 227K miles.
Turbo is a 1999+ model (replaced by PO).

When the truck is cold it starts up fine with one turn or less.

After is warms up it switches to rough operation and stumbling and
begins to spew a lot of gray smoke.

The check engine light comes on with p0216 codes and p1214 codes.

The pmd has been relocated to the cab and the optical sensor replaced.
Additionally, a different servo motor on the pump has been tried. None
of these changed the operation.

Not sure where to proceed next, but we think its something
temperature related. I.E once the truck warms up something trips, but
what we are unsure.
Here is a filled out checklist Thanks for you help guys.

0. Describe in detail the problem you are having. Please be as descriptive as possible.


Once truck warms up, it begins to run very roughly and spew a lot of gray smoke. It also shows engine check codes P0216 and P1214.

1. Does the engine crank, or 'turn over'?

Yes, no problems. Starts within 1/2 or 1 turn

1a. Does the engine start and run?

Yes

1a1. If the engine does not start - Crack injector line (http://www.dieselplace.com/forum/showthread.php?p=2188140#post2188140): do you have fuel? Yes/No

N/A


1b. Do you have a Wait To Start Light & the amount of time (seconds) lit.

Yes, around 10 seconds

1c. Ambient Condition (temperature outside indicate F or C) _____ °

60 Degrees


1d. Engine Cranking speed (if you have an accurate tachometer).

750 Rpm

1e. Are you experiencing stalling?

Sometimes, during warmup.

1f. If Stalling, describe (upon startup only, down the road, hit a bump etc)

Occasionally, during startup .

When it warms up it makes an oink noise like a pig then begins to run roughly.


1g. If Stalling, do you notice loss of dash or instruments?



-note if experiencing stalling,you must indicate PMD location in #24.
1h. Check turbo inlet and air filter for obstructions. Cone filters have lost disk and stopped air to turbo.

Filter OK


1.1 Lift pump test (http://dieselplace.com/forum/showthread.php?t=39350)- describe results

Lift pump ok



2. Service Engine Light while running?- on/off/intermittent

Once warm, it gives P0216 and P1214


2a. Service Engine light does glow during start/cranking/bulb check: NO

3. Model year
1997

3a. Odometer reading (indicate if in miles or km)

227K

3b. Miles on major engine components if been replaced (example Injection pump)

Turbo replaced

3c. Indicate the model number on the Injection pump (starts DS4 or DB2......)

DS4

4. Have you scanned for engine codes? (varies by pre/post 96) yes/no

Yes

5. List exact results on engine codes (http://www.dieselplace.com/forum/dtc.php):

PO216 & P1214

6. Air Filter condition (visual check)

Good shape

7. Fuel filter condition (freshly changed/condition unknown/mileage since changed)

Changed recently

8. Condition of Battery terminal connections (removed, cleaned and tightened)

Good

8a. Known condition and age of the batteries.

both New

8b. Are batteries of differing age or are they a matched set?

Matched set
8c. Condition of Major Grounds (http://www.dieselplace.com/forum/showthread.php?t=157085). (same drill as batt - removed, cleaned, retightened)

All fine

9. Upon cold start, does the radiator hose get hard quickly? Yes/no

Yes

10. Upon cold start, do you have excessive white smoke? Yes/no

no

11. Do you have excessive cranking time before the engine starts?

No

12. Have you used the block heater, and does this effect engine starting?(only try for starting problems)

NO

13. During hard acceleration, do you have excessive black smoke? Yes/no

No

14. Do you have any unusual exhaust smoke issues?

Gray smoke after warm up

15. Turbo check out (http://dieselplace.com/forum/showthread.php?t=39368)- pass/fail

didn't check

16. Do you have an EGR on the engine? (An F or an S engine code 8th VIN digit)

Don't know

17. Indicate if you know if it’s a 1500, 2500, 2500HD, 3500, 3500HD.

3500 Dually

18. Indicate fuel that you are using: Bio-diesel, #2 Diesel, #1Diesel, SVO/WVO, other

Regular #2 diesel out of the pump

19. Are you using any fuel additives? If so, please list.

No

20. Please indicate geographic region you are in: (example: Texas or Canada)

Virginia

21. Do you have any service history available that might pertain to the problem you are having?
NO

22. Please indicate any modifications to the vehicle that might help us diagnose better.

All factory except for PMD relocation to cab

23. Upon unscrewing the fuel cap (http://dieselplace.com/forum/showthread.php?t=42338), do you have a large vacuum formed in the tank? yes/no

No
24. Location of PMD/FSD (http://www.dieselplace.com/forum/showthread.php?t=39436)? On the pump/remoted over intake/remoted out of engine bay (please specify placement specifically)

PMD relocated to the inside of the cab and fitted with a heat sink

24a. If remote mounted, describe wiring harness (homemade or purchased from a vendor?)

Extended factory harness, i.e. homemade

24b. Indicate the location and condition of the FSD/IP grounding wire.

On block


25. Are ALL glow plugs in proper working order as per this thread (http://www.dieselplace.com/forum/showthread.php?t=39182)?

Glow plugs ok

Are you loosing any coolant?

The rad.hose getting hard would lean me twards cracked head or head gasket. Is it using any anti-freeze? I would pressure test cooling system when engine is warm. Is there a noticable rattle untill it warms up?[Timing advancing] Ip timing could be off. When engine warms up timing retards too far making stumble. Try unpluging temp sensor on the crossover that should make the computer think it's cold and advance the timing. The sound of the engine should change. A scan tool would tell you what the timing is set at and if it is advancing.I'm no expert. This is just what I would check first.The rad hose getting hard rightaway is usally a bad sign. Hopefully someone that knows more than me will chime in.