F350 super duty will not accelerate

20

Asked by Dec 21, 2010 at 05:45 PM about the 2005 Ford F-350 Super Duty Lariat 4WD Crew Cab LB

Question type: Maintenance & Repair

2005 Ford F-350 diesel starts fine when cold. Only intermittently accepts acceleration. It will sit and idle fine.About 2 weeks ago I had trouble with water in the diesel. Cleaned water out of freeze plug valve, replaced fuel filters and have been adding treatment to dry up water and clean injectors. Started running great for a few days. Then I noticed every time I got to about a 1/4 tank of fuel it had trouble starting. (The 1/4 tank could be coincidence but it happened 3 times)

While this was occurring it started having difficulty accelerating when starting off from a stop. It idles fine. But I'm flooring the accelerating and nothing is happening.

7 Answers

have the turbo checked,sounds like that is your problem.

20

Thanks for the help. I've had turbo issues before and had it replaced about a year ago. This was a warranty issue. The turbo was rusting up. I'm not sure what the manufacturer did to prevent this but I do know that they replaced it. I do spend alot of time around the gulf coast. The last time I had turbo trouble it was only losing power. This time it just will not respond at all when pressing the accelerator. I can hold the pedal to the floor and it just continues to idle. I've been wondering about the fuel injector pump. I've heard the rotor head assembly on the fuel pump can cause this problem when it warms up. Then when cooled the truck will run fine. Any thoughts? Thanks again!

2 of 2 people found this helpful.

,could be fuel injector pump,have them both checked,turbo.

1 of 1 people found this helpful.
20

I will. Thanks for the help!

30

please b 4 u go through all that please have your throttle position sensor check they will do the same and also check to see that when ur truck is warm if there's any white smoke coming out the tail pipe

3 of 3 people found this helpful.

Dont have a answer but have questio ns changed icp , ipr valve checked for high compression oil leak on injector side fixed that on top many other thing got it back from dealer ship on highway I lost accelerater pedal all together stolled got it to fire off again got it on side road run fine just cant keep a consistent 65 mph with buckin kicking and screaming around 2700 rpms it does it at. 2003 6.0 f350 any suggestions

Check acceloration pedal sensor. Should be actually connected to the pedal.

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