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Ford F-Series Gasoline Engine Problems
For the gasoline crowd, discuss your engine issues here.
kcram - Pickups Host
kcram - Pickups Host
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The symptoms before it goes out are: Lose of power under a load, erratic shifting under a load, erratic engine operation (RPMs go up to (4k+) but vehicle speed goes down). If you let up on the accelerator, engine RPMs come back to normal area and as long as you don't put it under a load it will keep running. If you try to accelerate rapidly, it will almost quit running and continue to slow down.
The strange part of this is that while this is happening I can put the truck in Neutral turn the key Off/ON and it will run normally for another 30 minutes or so. (I know this is an unsafe practice while moving but I'm getting very frustrated.)
The 1st pump went out at 15k. Ford dealer replaced the first 3 stating "contaminated fuel" was the cause. The next 5 were done by private shops. They could not give a cause other that a bad pump and did not find contaminated fuel. They could not explain the Neutral Off/On temporary fix either.
It has been suggested that a ground wire might be missing of loose, but I could not tell. At the next replacement I am going to have a ground wire installed from the tank to the frame. At this point it can't hurt.
If anyone has had a similar experience or has any suggestions, all will be considered.
The truck is an excellent highway cruiser but around town where we drive the most not so good.As with any make if you get a good one you are lucky. I am awaiting new Chevy redesign.No more Fords.
I really haven't a clue how to proceed. A friend of mine tested the fuel pressure and it appears acurate within the specifications (about 42 psi) while idling (even when it gets really rough). Any help or ideas is appreciated. Thanks.
-Wil
Don't let the repair go too long, all the excess gas is now burning in the catalyst and it will eventually melt the substrate and plug it. Catalyst = $$$ repair.
The truck will not stay running I have to constantly pump the accelerator to get it to start the motor runs real rough then I hold the pedal ¼ down the motor smoothes out runs for 5 seconds then dies. It runs so rough than a vacuum gage moves from 1 to 10 hg will not hold steady and does climb to al most normal when motor smoothes out for the 5 seconds
What could this be and or could you put me on the right track to finding out what to do.
I cannot take it in to run codes on the motor until I can get it to start and run.
I have replaced both fuel pumps, in-tank & frame rail plus fuel filter. In addition, made sure the intake air is not restricted. I also checked the exhaust it seems to be clear but did find the tube that runs from the EGR down to the exhaust is broke off at the exhaust pipe">
Help
Jerry
I separated the exhaust pipe and did not seem to help. I was also told to check and make sure I am not losing fuel pressure to the rear tank, will be checking this today, I'll let you all know what i find.
I still have not found the problem with this truck, I will be checking the computer this week, I am not getting a service engine light when it starts and this suggests that all sensors are working properly.
:confuse:
Any clues? Any other information you need?
You've got a good sized vaccuum leak somewhere. In addition to the other egnine function, vaccuum is used to hold the ventilation system actuator door in the vent/floor/etc. positions. When you have little or no vaccuum, the ventilation system goes back to default state - defrost. (It's done that way for safety.)
Look for brittle vaccuum lines - especially where they go into the firewall.
Not sure it will solve all your problems but once the vaccuum leak is gone it may make them easier to diagnose.
GOod luck.
I just took in my 2005 F150 for scheduled 60,000 mile service at my Ford dealership. The service advisor indicated that, though a change of spark plugs and tune up is not on the factory recommended maintenance schedule until 100,000 miles, 'they' are finding that the long-interval spark plugs are in some cases sticking to the heads, and that the dealership recommends a spark plug replacement and tune up at 60,000 miles, rather than the factory recommended 100,000. Has anyone else heard of this, or is the dealership just trolling for extra work that's not necessary?
It is some what true. The 2004 - 2005 5.4 engines do have spark plug problems. There is a TSB out on the proper removal procedures and also the recommendations to remove the spark plugs ever 50,000km and clean and coat them with a nickel antiseeze. You don't have the replace them at this time since they still last for 160,000km. New plugs cost 16.00CND each. ooch!!!
Thanks again.
thanks