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Printable View (7 KB) |
Article No.
97-06-18 |
- LOW RPM - 7.3L DIT ENGINE FAILS TO
START - CODE 340 STORED IN MEMORY AND/OR ENGINE FAILS TO
ACHIEVE RATED SPEED FOR 2-3 MINUTES AFTER EXTENDED COLD SOAK -
F-SERIES BUILT THROUGH 2/9/96 AND ALL ECONOLINES
- NO START - 7.3L DIT ENGINE FAILS TO
START AFTER EXTENDED COLD SOAK
- RUNS POORLY - ENGINE TEMPERATURE
COLD - RUNS OK WARM - 7.3L DIT ENGINE
- STALL - ENGINE TEMPERATURE WARM -
WILL NOT RESTART UNTIL COLD - 7.3L DIT ENGINE
- STALL ON DECELERATION - DURING COLD
AMBIENT TEMPERATURES - 7.3L DIT ENGINE
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| Publication Date: MARCH 17, 1997 |
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LIGHT TRUCK: |
1994-97 F SUPER DUTY, F-250, F-350
1995-97 E-350 |
This TSB is being republished in its entirety to update the model
years and include the latest level part.
ISSUE:
The 7.3L Direct Injection Turbo (DIT) engines are built with
0.1016-0.8128mm (0.0040-0.032") clearance between the Camshaft
Position (CMP) Sensor and the trigger wheel. At approximately
1.016mm (0.040") clearance, the sensor will fail to synchronize and
result in a no run condition. Improper CMP clearance can be
seen in the following five (5) symptoms:
- 1) Fault codes - incorrect
synchronization count
- 2) No start - after extended cold soak
- 3) Runs poorly cold - engine runs OK warm
- 4) Stall on deceleration - more
pronounced cold
- 5) Starts, runs cold, dies warm, will not
restart until cold
ACTION:
Install a shim between the CMP sensor and the front engine cover.
The shim will allow the correct clearance which should reduce the
possibility of concerns. Refer to the following Service
Procedure for details.
SERVICE PROCEDURE
- Perform normal DIT Powerstroke
diagnostics. If no other problems are found, proceed with this
TSB article.
- Remove CMP sensor and inspect for signs
of contact with the pulse wheel. Make sure the holes on the
end are filled with epoxy and inspect the connector mating cavity
for signs of oil contamination. If there are any signs of
contact, contamination, or the holes are not filled, replace the CMP
sensor (F5TZ-12K073-A).
- Repair symptoms 1) - 4) as follows:
install a 0.254mm (0.010") shim under the CMP sensor. If
symptoms persist, increase the shim thickness to 0.508mm (0.020")
Shim (F7TZ-12J072-AA)
| NOTE: |
SOME ENGINES BETWEEN SERIAL NUMBERS 388840 AND
410010 HAVE BEEN BUILT WITH EXCESSIVE AMOUNTS OF TRIGGER WHEEL
RUNOUT. RUNOUT OF THE TRIGGER WHEEL GREATER THAN 0.508mm
(0.020") MIGHT NOT BE RESOLVED WITH A SHIM. THE ADDITIONAL
CLEARANCE CAN PUT TOTAL CLEARANCE ABOVE 1.016mm (0.040") AND
CAUSE FAILURE TO SYNCHRONIZE. |
- If symptom 5) occurs and trigger wheel
runout is greater than 0.508mm (0.020"), try a 0.254mm (0.010")
shim. If the concern is unresolved, replace the Camshaft
Assembly (F4TZ-6250-A). Refer to the appropriate model/year
Service Manual, Section 03-01C, for camshaft assembly replacement
procedure.
| PART NUMBER |
PART NAME |
| F5TZ-12K073-A |
Camshaft Position (CMP)
Sensor |
| F7TZ -12J072-AA |
Shim |
| F4TZ-6250-A |
Camshaft Assembly |
OTHER APPLICABLE ARTICLES:
NONE
SUPERSEDES:
96-14-15
WARRANTY STATUS:
Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage
And Emissions Warranty Coverage
| OPERATION |
DESCRIPTION |
TIME |
| 970618A |
Install Shim And/Or Replace
Camshaft Position (CMP) Sensor |
0.3 Hr. |
| 970618B |
Replace Camshaft - Econoline |
15.4 Hrs. |
| 970618C |
Replace Camshaft - F-Series With
Automatic Transmission |
13.8 Hrs. |
| 970618D |
Replace Camshaft - F-Series 4X4
With Manual Transmission |
14.0 Hrs. |
| 970618E |
Replace Camshaft - F-Series 4X2
And Super Duty With Manual Transmission |
12.8 Hrs. |
| 970618F |
Additional Time For A/C -
Econoline |
1.0 Hr. |
| 970618G |
Additional Time For A/C - F-Series |
0.9 Hr. |
DEALER CODING
| BASIC PART NO. |
CONDITION CODE |
| 12K073 |
36 |
OASIS CODES:
602300, 603000, 603300, 607000, 607400, 614000, 614500, 614600
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