Question about Ford E-350

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'89 Ford E-350 7.3 diesel Injector pump is leaking at shaft, passenger side hard starting, otherwise runs great can I fix only that leak?

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  • Ford Master
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YOU CAN REPLACE THE O RING ON THE DRIVE GEAR END OF THE INJECTION PUMP.

Posted on Aug 04, 2010

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Posted on Jan 02, 2017

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2.7l 5 cyl diesel motor in jeep hard starting and when going down road seems to miss and not run on all cylinders only 80000 kms since new


You may have a leaking injector or a bad injection pump problem. Sounds more like a leaking injector because it is missing. I would check for a leaking injector first. Hope this helps.

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1995 f-350 runs rich and won't idle?


If this is a gas engine, check for air leaks on the intake manifold and every vacuum line and switch you see. Use a pump spray water bottle and with the engine running, spray around seams and such.

A change in rpm or stalling will indicate the leak.

What is probably happening is the air leak is making the system run rich to balance the air/fuel ratio. This would make more fuel dump into the engine where it is not needed.

Another possibility is a loss of the signal from an O2 sensor. The O2 sensor sends a signal to the ECM to set the fuel demands and let the engine controls know that the fuel ratio is rich-normal-lean to adjust to optimum running condition.

Now if this is a Diesel, the hard to start condition would be due to an inoperative glowplug timer or worn glowplugs. If this is the mechanically injected model, the injector pump is timed to get the fuel into the cylinder either earlier or later to change the fuel ratio. Your diesel injector pump would need to be retimed. It will help across the board.

Please rate my info and let me know how you solved this.

Mar 03, 2013 | 1995 Ford F350

1 Answer

2006 6.0 will only start with starter fluid once it starts it runs great only happens cold


You may have a defective fuel pump pressure check valve, have a pressure leak down test run Ont eh fuel pump, it should not loose more than 5 PSI after shut down. The test port is on the fuel injector rail on the top of the engine.

Sep 28, 2012 | 2006 Ford F 350 Super Duty

1 Answer

I have a F350 diesel non- tubo with a fuel leak in back at top. replaced o ring at back injector and replaced all hose clamps but still bad runing leak. What next?


This engine has fuel lines that run to each injector from the injector pump. On the older Fords they touch each other in places. This constant vibration from the engine has caused a pin hole in one of your fuel lines to the injector. You will need to find the bad line. Can be hard as some of these are buried and hard to see. The replacement line will need to be purchased from Ford as each fuel line has to be a certain length and they are all high pressure lines. I have seen this many times in the older Fords.

Apr 05, 2012 | Cars & Trucks

2 Answers

2006 ford f350 deisel turns over wont start unless i use starting fluid it then runs great. changed fuel filter oil filter and oil, wrench symbol came on went into engine fail safe mode, said something...


the diesel engine is a 6.0L or a 6.4L? because the 6.0L don't use electronic throttle control. they control the demand of diesel threw the high pressure oil system they have a sensor call injector pressure regulator. this sensor is responsible of maintain the proper pressure in the high pressure oil system so that the engine could start . i also suggest you to check if it is any leak on the high pressure oil system or if the low pressure system is delivering the pressure required for the high pressure system to work properly. to do that you most have a scan tool. also you can check the pressure of the diesel pump that its in the chassis to eliminate the high pressure oil system as the cause of your concern. if u don't have the proper gauges to check the pressure of the diesel pump you could remove the cap of the small fuel filter that is next to the oil filter remove the filter and put the ignition switch in the on position and see in the container if you have a fast or slow filling. if you encounter that the filling is too slow then your problem is with the fuel diesel pump that is on the chassis this pump is called HFCM, Horizontal Fuel Control Module

Jan 30, 2011 | 2006 Ford F 350 Super Duty

1 Answer

2006 f350 super duty diesel start good in the mornings but after is warm it wont start.


these trucks use a oil fired fuel injector, if your high pressure oil pump has eccessive wear or if your oil to broken down from being run to long between oil change, it will not build enough oil pressure to fire the injector once the oil is thinned out from being hot. An oil leak in your high pressure oil system can cause same problem.

Jan 11, 2011 | 2006 Ford F 350 Super Duty

1 Answer

I have a 1989 international truck w/ 7.3 litre diesel. Same engine as in 1989 ford f-350 diesel. Trouble starting. I replaced glow plugs and glow plug controller / relay. Still problem starting do not want...


you answered your own question with # 1
the fuel leak is doing opposite when starting it is sucking
air . i had the same problem on mine,
it also let the fuel drain back to the tank that then
takes forever to reprime itself
hope this helps

Nov 14, 2010 | 1989 Ford F 350

2 Answers

Have a 2004 F-350 6.0 diesel. Just replaced


time for a newmotor sorry about your luck i just changed a 6.0 this spring for a guy and the cheapest one we cpuld find with 180 000 k was 5900.00 dollars

Dec 06, 2009 | 2004 Ford F350

2 Answers

Diesel leak from under pump cover


YES THE CONNECTIONS ARE THE IN AND OUT HOSES ON THE PUMP.

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1 Answer

I have an issue with my 94 ford 350 diesel. A major oil leak


hello if it leaks in alot of places you may want to check your pvc valve

Feb 16, 2009 | 1994 Ford F350 Crew Cab

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