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Don't know how to set timing after replacing fuel pump

Replaced fuel injector pump on a 1992 International Diesel 7.3 dump truck. The truck is not running right, has no power whatsoever, is not firing right. Is the timing off, and if so how do I correct?

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Replacing the fuel injector pump shoould not have any thing to do with the timing, did you prime the pump before putting it in?

it is critical that you prime the pump...

If you did not, take it back off and prime it then put it back on, it is possible there is air stuck in it...

Posted on Nov 26, 2008


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Posted on Jan 02, 2017


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Truck hard to start

Diesel? sounds like the Fuel system is not fully purged of air.

Jul 07, 2013 | 1992 Ford F250

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According to my Haynes Diesel Engine Repair manual this is a list of possible causes.
1.Slow idle incorrectly adjusted
2.Fast idle is inoperative
3.Restricted fuel return system
4.Glow plugs turn off too soon
5.Insufficient fuel suuply to injector pump
6.Injector pump malfunction
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The manual is part number 10330 anywhere they sell Haynes manuals ($20). It has a very good section on the 7.3 especially if you don't want to spend money at a diesel shop every time it needs work. Hope this helps.

Jun 19, 2011 | 2003 Ford F350 Super Duty DRW SuperCab

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I have a 91 f-250 w/ 7.3 diesel. It has fuel to the inlet of the injector pump, but no fuel will come out of the pump on the injector side even with all of the injector lines disconnected. With power on I...

the pump is a mechanical injection pump with the high pressure of 21,000psi being generated in the pump
research shows that the f250 and f350 7.3 ltr 1988-1992 were in fact an international indirect injection engine.
to not have fuel at the injector lines , indicates the the fuel control is in the stopped position and so no fuel gets to the top of the elements controlling the pressure
It is a rotary pump ( looks like a petrol distributor with steel lines instead of wires)
the replacement cost is around $500.00
best if you talk with an accredited diesel professional shop as to the problem as it will not be uncommon
unlikely to have a filter in the body of the pump to cause the problem and more likely to be a broken drive shaft , stop valve blocked or pump element body cracked internally

Sep 10, 2017 | 1991 Ford F250

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1990 chevy blazer 350 ci throttle body fuel injected . the motor is flooding out u can see the injectors keep dumping fuel into the throttle body

Sounds like you have an injector leaking. Have someone just cycle the key on and off to run the fuel pump but don't crank the engine. If you see fuel dripping from the injectors, unbolt the injector cover on the throttle body, remove the injectors and replace the orings around the injectors.

Jul 22, 2010 | 1991 Chevrolet C1500

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1992, F250, Diesel, 7.3 International, 4x4, no A/C. Could you please tell me where the fuel pump or fuel pumps are located? This truc has 2 fuel tanks. I have been experiencing starting problems. It seems...

Check rubber return lines running from injectors to back of engine. Hoses maybe cracked and allowing air in the system causing hard long starting.

Jul 21, 2010 | 1992 Ford F250

1 Answer


check to see that your mechanical fuel pump is working on the lower right side of the engine. VERY problematic pump due to design and location. Have you replaced your fuel filter with the injector pump swap? cause you need to do that , its a must If your getting fuel to your injector pump you have to bleed the lines to each cylinder to bleed out the air in the system. If that all checks out then you need to set the timing to 8 deg using a timing light and a diesel injection pulse width adapter timing tool. purchase a haynes manuel for 6.9l/7.3l diesel engines to follow the correct procedure for setting timing to manufactures spec. You will have to disconnect sensor at certain times during the timing stage so make sure it is done right!
PS - I hope you marked a reference line on the pump to line up with the line on the housing cause that will get you close to start! good luck

Apr 07, 2010 | 1986 Ford F 350

2 Answers

White smoke

these engines are pron to injector failure !!! white smoke means dumping fuel ! black smoke means lack of air ! blue means burning oil! its not an easy task! by all means not cheap! ull need 7 injectors and one #8 injector call a ford dealer to see the price ! but i would also call an international aka navistar dealer! there sometimes cheaper

Mar 18, 2010 | 2000 Ford F250 Super Duty Crew Cabs

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