Category Archive: Ford / F350

Ford F350 will not start when engine is hot

Car Information:
Ford F350
Year: 2004
Engine Size: 6.0 Diesel
Trans: Automatic

Issue / Question:
Truck will not start when hot also will not accelerate sometimes when stepping on accelerator. Have changed fuel filter and fuel pump. Starts ok when cold and when I wait about a hour. Ford says can’t find anything wrong, no codes. Thanks.

Answer:
Its usually a bad injector pressure regulator that causes this problem.
Also a leak in one of the internal oil supply lines can cause low oil supply pressure at the injectors and cause hard hot start. Most likely its going to require a injector pressure and oil supply pressure test to see which it is.

For professional Orlando Auto Repair you can call our shop today at 407-629-2661.

 

Magic Mechanic
1432 Lee Road OrlandoFL32804 USA 
 • (407) 298-7447

F350 with bad injector pressure regulator

Car Information:
Ford F-350
Year: 2004
Engine Size:6.0 diesel
Trans: Automatic

Issue / Question:
The truck will not start when hot. Also it will not accelerate some times when stepping on the accelerator. I have changed the fuel filter and fuel pump. It starts ok when cold and when I wait about an hour. I can’t find anything wrong or no codes.

Answer:

This usually is caused by a bad injector pressure regulator. Also a leak in one of the internal oil supply lines can cause low oil supply pressure at the injectors and cause hard hot start. Most likely it’s going to require an injector pressure and oil supply pressure test to see which it is.

For professional Orlando Auto Repair you can call our shop today at 407-629-2661.

 

 

Fuel Injectors

Car Information:
Ford F350
Year: 2000
Engine Size: 7.3
Trans: Automatic

Issue / Question:
First of all let me say we are loyal listeners to your show on the am radio and have had our vehicles in your shop a few times before and received top notch service. I have a few questions on my 2000 F-350, it has the 7.3 powerstroke engine. My truck has approximately 195k miles on it. I am getting a hair over 14 miles to the gallon on the highway. The truck is 4WD. Its has the 4:10 gear in it which I’m sure doesn’t help my problem but I was told that having so many miles on it that replacing the injectors could help my fuel mileage. Is this true and if so who would you recommend for a set of injectors? Also if I do end up replacing the injectors I assume that higher performance injectors will not help the mpg, is this assumption correct? If so could you give me a little insight as to how much of a difference in mpg I’m looking at if i go with an upgraded injector as compared to a stock replacement.

Answer:
New injectors may help with your fuel economy temporally, see what happens is with the ULSD diesel the injectors get very little lube causing them to short stroke and wont atomize fuel properly when dispersed. Try adding about 16 ounces of Amsoil 100 to 1 two stroke outboard oil to a full tank of fuel and see what happens, this usually provides enough lubrication to get the injectors back to a full stroke and increase torque tremendously. If you have to replace the injectors we can put a price together but unless you got a dead injector this usually works wonders (no kidding).

For professional auto repair & services in Orlando you can call our shop today at 407-629-2661.


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