Question about 1985 Ford F 250

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1985 F-250 Diesel Fuel Leak

I thought my O-rings were leaking on the fuel line because there was a puddle of fuel In my rear passenger side glow plug, but after replacing the O-rings, I realized that the fuel was gone. Anyway, I started my truck and realized that my O-rings weren't the problem, but the fuel was bubbling up from the inlet of my glow plug, please tell me this is an easy fix. I also want to know if this is the reason behind me having NO throttle response for about 5 seconds, and also my truck cuts off when I stop at a light, but starts right up like there isn't a problem. It all seems like the small fuel leak is causing my truck to lose prime and cut off. Please help

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Posted on Jan 02, 2017

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SOURCE: oil leak on top of engine behind turbo

MY 2001 7.3 was leaking the same way. The dealer said the o'rings under the pedestal were leaking. I had the dealer replace the o'rings. By the time I got home, it was leaking again. Called the service department and told the manager,and they put on a new pedestal and o'rings. They only charged me half price for the pedestal and no labor. That did stop the leaks.

Posted on Oct 09, 2008

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SOURCE: 2002 Ford F250 has fuel leak of unknown origin?

it sounds like your water seperator valve is leaking is the valve on the back of the filter bowl .it is attached with 4 screws .and has a tube that drains on the right front of the can be replaced in a matter of minutes and costs about 50 dollars..

Posted on Dec 01, 2008

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SOURCE: brake line behind fuel tank leaking

If the line leaking is plastic then it's not a brake line it's a fuel line. If the truck runs then it is most likely the return fuel line. If you can't get to it without dropping the tank then that's what you'll have to do, but you shouldn't need to remove it completely.
It is best to siphon out as much gas as possible. Before you removing the bolts take 2 pcs. of smooth fence wire or even 12ga. copper wire and make a cradle to support the tank, cut the wire at least 2 ft. longer than what it will take to go from the frame to the drive-shaft.
At a point about 1/3 in from each end of the tank lupe one end of the wire through holes in the frame and twist it a couple of times, then run it under the tank and around the drive shaft and twisting the ends a couple of turns.
After you get all the bolts out of the tank supports if you don't have room to repair the line you can loosen the wires around the drive-shaft and allow the tank to drop down some[this is why you need the wires 2 ft. longer]
After the repairs which will probably be replacing the rubber fuel hose that attaches the line to the tank,[I'd replace both of them] tighten the wires around the drive-shaft and replace the tank bolts. Remember to get all your bolts started before you tighten any,

Posted on Jan 06, 2009

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SOURCE: 2004 Ford F350 diesel, changed fuel filters hard starting

Pull the filters and ck for plastic or o-ring in wrong place. Something is up in the filter. 

Posted on Jul 28, 2009

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SOURCE: 2002 F-250 7.3 l diesel leaking fuel at the fuel filter

Running Bio-Diesel should not be a problem, although BD is a great solvent that will dissolve petroleum desposits left behind by regular diesel. I suspect that the gaskets on the fuel drain valve are worn out and leaking fuel. Most of the time the whole valve is replaced, but I have seen only the two o-rings for sale on the internet. It is easier to repair by laying on your front side on a large pillow. If that does not work, come back to fixya and we will help you again.

Posted on Sep 23, 2010

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Gas leaking front passenger side of ford windstar

Have you looked under the hood? (I don't mean to sound like a wise guy.) There are two shiney metal pipes one on the front of the engine and one on the rear as you look at it from the front. They run from right to left on the engine. These are the fuel racks that feed the fuel injectors, (assuming that you have a 3 litre or larger v6 engine). These can concievably rust at the left, (passenger), end and blow gasoline out the passenger side. It is also possible that gas could be leaking anywhere on the engine and roll off the passenger side of the engine or if the fuel line on the driver's side has rusted over a cross member of the frame and possibly roll to the passenger side. Also, there is pretty good pressure on the fuel line when it is running. If there is a rust hole on the right side of the line itself, it could spray to the passenger side, hit something and drip off from there. These are just possibilities. Good luck. Jeff M.

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Diesel fuel leaking on to floor on passenger side

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easy huh?

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1991 f 350 wont stay running7.3 deisel new injecters new glow plugs new fuel filter have to put gas on a rag and cover intake starts but u put into gear and dies

Many things to check. Wonder if this work was done to alleviate problem or problem was from doing the work.

Putting gas fumes in a 21:1 compression cylinder is sure way to ruin engine.

2 possible problems are losing your diesel fuel draw from an air leak in the fuel lines and an inoperative glow plug timer.

When you change a fuel filter you lose the vacuum lock that is in the fuel lines. Some mechanics add fuel to the new filter to remove some of the air and promote fuel draw. The O rings on the injector lines are a special type which resists petroleum products. Using cheap O rings will cause problems.

Glow plug timer-there is a power Relay to the timer and the timer itself is a type of Relay. You should hear clicking noise and lights should dim as timer provides power to the glow plugs.

Other things to check would be the Vacuum pump as Diesels work differently than gas engines and require a pump to supply Vacuum. Covering the intake suggests engine needs a Vacuum draw.

Weak fuel pump. Too weak to pressurize or draw fuel. Can be measured with pressure gauges.

Really bad rings could also cause symptoms.

Would be interested knowing what proved to be wrong.

Sep 29, 2013 | 1989 Ford F 250

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

1 Answer

MY SON HAS AN EX royal mail w reg 55d van. he has great problems starting the vehicle.the battery and glow plugs are new. he has to resort to pushing the *** under the bonnet to get the diesel through. any...

Hello, Your complete message did not come through as 1 word was bleeped out so I do not know what he pushed to get the diesel to flow. What usually happens on Diesel engines is they lose the Diesel fuel in the line due to an air leak. Most of the time the fuel just returns to the tank and fuel has to be drawn all the way back to the engine.

Because of the air leak the fuel can not be pulled up front to the engine. What is usually done is to disconnect the main fuel line at the tank and pressurize the fuel line with air from a compressor with a small amount of force, perhaps 20PSI. Then spray the fuel line working forward from the tank with a soapy water spray from a old detergent sprayer. The leaks in the line will make the soapy water bubble. Then fix the bad spot.

If having a compressor is a problem, there are small "O" rings on the connections under the bonnet. They are cheap, but you need Automotive type "O" rings to withstand the chemicals. There can also be "O" rings in the Injectors. It is also possible to have a clogged Injector which is not closing completely. This can show up in the 20PSI test, or there are machines which can test the Injectors at some Mechanic shops.

I stayed with the fuel idea as a problem based on your letter. But your son should check a part called a "TIMER" for the glowplugs as this part actually makes the new glowplugs your son installed, work. The timer can be tested with a Voltmeter or testlight. Since your son felt the old glowplugs were bad, the problem can easily be due to a bad timer.

I hope my solution is very helpful in solving the problem. You can copy this infomation with a printer in your home and give my advice directly to him.

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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

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