Injection pump timing

[John Scott]

Has any one ever used one of these to time your injection pump... if so explain



Rotunda 78-0100 Ford Diesel Tach & Timing Meter Tool 6.9L 7.3L IDI + Others

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[gnathv]

1994 PCED OBDI-A
SECTION 20A: Diesel Diagnosis—7.3L IDI Engine
Setting Injection Timing—Dynamic Timing
078-00200 or equivalent, by placing magnetic pickup in timing pointer probe hole (Figure 14 or 15). Insert pickup until it almost touches vibration damper.

1. Attach clamp from Timing Meter Adapter Rotunda 078-00201 or equivalent to the line pressure sensor on No. 1 injector nozzle (F-Series) or No. 4 injector nozzle (E-Series) and connect to timing meter (Figure 16).

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Figure 14: Magnetic Pickup—Dynamic Timing, 7.3L IDI Turbo Diesel Engine

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Figure 15: Magnetic Pickup—Dynamic Timing, 7.3L Naturally-Aspirated Diesel Engine

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Figure 16: Luminosity Probe—Dynamic Timing
Note: Make sure that all wire leads are located away from the front accessory drive belts.

1. Connect dynamic timing meter to battery and dial in minus 20 degrees offset on meter. Disconnect cold start advance solenoid connector from solenoid terminal (Figure 11).

Note: Activating cold start advance solenoid can result in engine speed increase. Adjust throttle control to attain 2000 rpm, if required.

1. With transmission in NEUTRAL and rear wheels raised off the ground, start engine. Using Throttle Control Tool D83T-9000-E or equivalent, set engine speed to 2000 rpm with no accessory load. Observe injection timing on dynamic timing meter. Injection timing should be 8.5 degrees BTDC at 2000 rpm.

1. Apply battery voltage to cold start advance solenoid terminal to activate it.

1. Check timing at 2000 rpm. The timing should be advanced at least 1 degree before the timing obtained in Step 5. If the advance is less than 1 degree, replace fuel injection pump top cover assembly.

1. If dynamic timing is not within ±2 degrees of specification, adjustment of pump timing is necessary.

1. Turn engine off. Note timing mark alignment. Remove fast idle bracket and solenoid from injection pump. Break torque (keeping nuts snug) on nuts attaching injection pump to pump mounting adapter with Injection Pump Mounting Wrench T83T-9000-B (Figure 2).

1. Install Injection Pump Rotating Tool, T83T-9000-C (Figure 4), on front of pump. Rotate clockwise (when viewed from front of engine) to retard, and counterclockwise to advance timing, by lightly tapping tool with a rubber mallet. Two degrees of dynamic timing is approximately 0.75mm (0.030 inch) of timing mark movement.

1. Remove rotating tool and tighten nuts to specification. Start engine and recheck timing.

1. Repeat Steps 9, 10 and 11 as necessary, to set timing to ± 1 degree of specification.

1. Turn engine off. Remove dynamic timing components. Install fast idle bracket and solenoid and tighten bolts to specification.

 

[gnathv]

How complete the meter is will depend on the instructions given. I have the same problem but. Here is what I found. The meter has the simple positive and negative cables that you connect to the battery. The white wire is the piezo plus and it connects to the # one injector and a near by ground. The next is the magnetic pickup with what looks like an old Briggs & Stratton pull start handle. That connects to the box that has "use with 7.3 motor" on it. Also on that box is where the plus white wire connects. Now connect the box to the meter and install the magnetic pickup in the tall tube at the dampner. Make sure its very close to the dampner or it wont work. I was advised to keep it 1/16th inch from the dampner. Try to get it closer but not touching it. Now set the offset on the meter to -20 degrees. Start the motor and have the rpm at 2000. Check the reading where the offset was and it will tell you what the advance or retarded degrees is. Be sure to trun off the motor when you advance or retard the timing. Otherwise the injection pump will turn by itself and break something. These pumps have plenty of force going on in them trying to turn them if things are not tight. PS... Those 3 nuts are hard to reach and must be tight when your done but not so tight that they break off. The small 5/16 bolts that hold the gear to thepump torque is 25 lbs. Be sure to use the correct socket. Somelike the 8 mm socket. Id your truck an auo or standard trans?

This is from icanfixall.

 

[gnathv]

This is specific to the 78-0100


Here are instructions for setting timing. I'll be glad to assist if you need more help.

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Fig. 9: Rotunda dynamic timing meter used for diesel injection timing. Cetane tester, magnetic pick-up probe and luminosity probe also shown

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Fig. 10: Diesel engine magnetic pick-up probe hole location

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Fig. 11: Rotunda diesel throttle control tool

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Fig. 12: Diesel engine dynamic timing specificationsStatic Timing

1. Break the torque of the injection pump mounting nuts (keeping the nuts snug).
2. Rotate the injection pump using Tool T83-9000-C or equivalent to bring the mark on the pump into alignment with the mark on the pump mounting adapter.
3. Visually recheck the alignment of the timing marks and tighten the injection pump mounting nuts.

Dynamic Timing

1. Start the engine and bring it up to normal operating temperature.
2. Stop the engine and install a dynamic timing meter, Rotunda 78-0100 or equivalent, by placing the magnetic probe pick-up into the probe hole.
3. Remove the No. 1 glow plug wire and remove the glow plug, install the luminosity probe and tighten to 12 ft. lbs. (16 Nm). Install the photocell over the probe.
4. Connect the dynamic timing meter to the battery and adjust the offset of the meter.
5. Set the transmission in neutral and raise the rear wheels off the ground. Using Rotunda 14-0302, throttle control, set the engine speed to 1,400 rpm with no accessory load. Observe the injection timing on the dynamic timing meter.

Obtain the fuel sample from the vehicle and check the cetane value using the tester supplied with the Ford special tools 78-0100 or equivalent. Refer to the dynamic timing chart to find the correct timing in degrees.

1. If the dynamic timing is not within plug or minus 2 degrees of specification, then the injection pump timing will require adjustment.
2. Turn the engine OFF. Note the timing mark alignment. Loosen the injection pump-to-adapter nuts.
3. Rotate the injection pump clockwise (when viewed from the front of the engine) to retard or counterclockwise to advance the timing. Two degrees of dynamic timing equals approximately 0.030 in. (0.76mm) of timing mark movement.
4. Start the engine and recheck the timing. If the timing is not within plus or minus 1 degree of specification, repeat steps 7 through 9.
5. Turn the engine OFF. Remove the dynamic timing equipment. Lightly coat the glow plug thread with anti-seize compound, install the glow plugs and tighten to 12 ft. lbs. (16 Nm). Connect the glow plug wires.

 

[John Scott]

Thank u for all the great info.... my plan is to hook up the machine and take a reading on how the old pump is set up before I replace it.... its running fine starts fine truck has 160k miles and I don't know if the pump or injectors have ever been changed or serviced so figgered this is a good time to do so...

 

[gnathv]

Make a scribed line on housing and pump so you can put it back in same position before you remove it. If your new pump has problems you could put your old one back on.

 

[John Scott]

Make a scribed line on housing and pump so you can put it back in same position before you remove it. If your new pump has problems you could put your old one back on.

Good idea... ill make sure to do that....

 

[gnathv]

Did you get it timed?

 

[John Scott]

Did you get it timed?

Not yet... still waiting on pump... rotunda meter came today.... ill let u know once I get everything in... thank u for checking in

 

[92 dizzel]

Where did you find the Rotunda?? I've been trying to find someone to time my 7.3 or a meter, seems like these things are all but obsolete

 

[92 dizzel]

I found one for sale. It doesn't look like it has the "use for 7.3 engine" part with it. Is that necessary?

 

[homelessduck]

I found one for sale. It doesn't look like it has the "use for 7.3 engine" part with it. Is that necessary?

This is the meter I use. I love it.

https://www.ebay.com/itm/DTI-Tach-T...&_trksid=p2057872.m2749.l2649&redirect=mobile

 

[IDIBRONCO]

I found one for sale. It doesn't look like it has the "use for 7.3 engine" part with it. Is that necessary?

If it's the part that clamps onto the timing adapter on the #1 fuel line, then you shouldn't need it. You should be able to use the injector line like a 6.9.

 

[92 dizzel]

This is the meter I use. I love it.

https://www.ebay.com/itm/DTI-Tach-T...&_trksid=p2057872.m2749.l2649&redirect=mobile

Forgive my ignorance, but that meter says it's for Chevy. Does it work just as well on 7.3?

 

[92 dizzel]

If it's the part that clamps onto the timing adapter on the #1 fuel line, then you shouldn't need it. You should be able to use the injector line like a 6.9.

They want quite a bit for it, $350, is it the best way to get these 7.3 idi's timed? I'm tired of not knowing how far off my timing is, and I already tried to find someone in the Phoenix area that can do it with no luck.

Thanks