Ford Super Duty (1999-2016) :: 2004 - Getting 8 To 11 Mpg - Change Cold Air Intake?
Aug 14, 2015
My truck: 2004 F250 SD 5.4L 191k auto lifted 3" 315/75/16 tires 3.73 rear. When I got the truck with 149k it got between 12.5-13.5 in town and 15.5-16.5 long hwy trips. Also the truck could get up and go no problems. Would easily go up hills without kicking down gears and shooting up in the rpms. Been pulling a 32ft trailer last two years and was getting between 6-8.5 mpg pulling it. The Truck is now slow to move up hill even when not towing, kicks down a lot and is getting horrible mileage. I could get 370 miles on a tank before, now I get 226 miles to a tank. Getting around 8.7-9.5 mpg in town and 10.8 hwy.
Two months ago I blew two plugs and had that repaired. (Gas mileage was falling before that happened and didn't change after it got fixed.)
Recently changed fuel filter, plugs, air filter and oil. Visually inspected MAF and I can't see any build up on it. Looks really clean.
So here is my questions... What else can I do to fix the gas issue. I am thinking about going down to a 285 or 295 series tire, but don't want the truck to look goofy with small tires on. 3" lift. So what else? Did someone say maybe the cat was starting to clog, but wouldn't that throw codes? Would a true cold air intake improve the performance?
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Circumstances required me to make an emergency trip to Phoenix this week. On the way down, I first got the "Oil change soon" warning, followed by the "Oil change required" message a few hundred miles later.
I religiously keep my truck serviced on time, and have never had either of these warnings come up before. My truck had 2700 miles on it since last service was done when this first warning came up. My truck gets very little idle time, so it's not sitting idling for hours a day.
My question is, is this oil change message a result of an actual oil monitoring sensor that measures oil quality on-the-fly, or is it strictly based on a miles or odometer timer that gets reset when dealer changes the oil?
At this point I'm wondering if the kid that serviced my truck either forgot to reset a timer, or worse, just "pencil whipped" my oil change. I have to call my home dealer back, since the service manager wasn't in yet when I called.
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My v10 has a cold miss when i start it in the morning no matter what the temp. It misses until it gets up to operating temp.then it runs fine all day with a slight miss.
- Changed plugs,
- Changed pcv,
- Changed iacv,
- Cleaned map sensor,
- Changed tube to pcv,
No codes. Its running as if it had a carb and the choke is closed. No smoke, tach. idles between 750 down to about 500, until it warms up then tach. Stays steady.
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The truck starts up fine. then after a minute or so it starts to spit and sputter and back fire through the intake then dies.
What could cause this? Intake manifold gasket leak?
Will a clogged fuel filter cause this?
5.4 ....
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1999 F-250 LD 5.4... There is a hole on the back of the upper intake manifold, just below the back of the throttle body, is a vacuum hose supposed to be attached here? Have a serious vacuum leak, no coolant loss, no overheating, just had cop's and spark plugs done, now she backfires, stalls and will not stay running, mech. says its an intake gasket but the gasket and lower intake manifold look new.
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I needed to replace the intake manifold gasket on my 2002 f250 v10. Tore everything apart put the new gasket in which was the same as the old one lyrics to notice something isn't right. I have been driving the truck for over 10 years like this. Is it OK to just continue bolting everything down and go on like this? I am guessing the prior owner 10 plus years ago put the wrong intake on. I keep looking up intakes but they all look just like the one I have. Also that port exposed is on the back passenger side.
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I have a leak where my heater core tube goes into the intake at the rear pass side of engine. I have read that this part is pressed in. I dont want to remove the intake since i just paid $400 to have a new gasket kit put on. My question is can I bypass this tube with a hose from the water pump like in this video?
FORD 4.6 , 5.4 , 6.8, HEATER HOSE UNDER INTAKE REPLACEMENT THE EASY WAY !!! - YouTube....
If I can do a rubber hose like in the video I was to make sure that the tube just goes through the intake and that it does not supple coolant into the intake??
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I just bought a 2014 6.7 and the dealer claims every 10k. What is your alls opinion for optimum performance and engine life?
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Wife took truck out and turned around after going less then a mile, saying it was running very bad. We got this truck about two months ago at a state vehicle auction. It was a state used truck, 145,000 miles, 05 Ford F350, ext cab and 8' bed. Anyway at first I thought it was valve tap until research said an exhaust manifold. With a fog machine in rear exhaust pipe we confirmed it was leaking and replaced the exhaust manifold. Figured it was probably a good time to replace spark plugs too. Took truck for a ride and she still buck and farted.
Got a code machine and got P0171 and P0174. Couldn't find a vacuum leak, but your could hear the air being sucked in. went to local parts store, guys couldn't find leak, but they said truck sounded like a steam machine. today I made a homemade smoke machine and smoke came from air intake, figured the gaskets were bad. The pictures show what I saw when I took the gaskets off. The port that has melted is the same port were the exhaust manifold was leaking from. Am in deep "doo-doo". What caused this?
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I have an 11 F350 6.7. It has just under 200K miles on it. Yesterday I changed the oil. Very uneventful. Today however, I was driving home, about 100 miles, and my truck's temp spiked. Not like a little spike, but jumped to the 3/4 mark(if there was one) then slowly kept rising to to the overheat mark. I pulled off onto the hard shoulder waited an hour or so to let it cool down, then finished the drive home.
All the way home my temp gauge seemed like it was on some sort of drug. It would jump a needle width when I would have to accelerate, then slowly cool to normal after I got up to cruising speed.
When I got home I checked the oil level and it was spot on in the "normal" range. I haven't used a different type/brand/weight of oil in the last 100k miles. Did something just give out on my truck? I had the coolant flushed and replaced at the dealer within the last 10k miles.
Up until this point this truck has been exceedingly reliable. I pull a 13k 5th wheel once a month and drive about 40k-ish miles a year.
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I change my own oil. I've done it at 2K, and 5K. Odometer just hit 5500 (Had it almost a year, Man I gotta get out and drive it some more!). Now when I start it up the "engine oil change soon" message appears. I can hit reset on the steering wheel, and it goes off, but the next time I start up, it's back. How can I let the truck know that the oils been changed already?
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Bought a truck that has the speedometer face that reads KMH on the top in the big numbers and MPH in little numbers. Ideally, is there an decal or plate I can affix in front of the KMH plate that will reverse those so that MPH is the more prominent? Or, worst case, where can I get a new plate for the instrument cluster. It's a 2012 F-350 XLT gas.
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03 F250 250k+ miles has a sputter when lugging, instead of down shifting just lug it for a sec and feels like a bad coil pack missing or water in gas miss but smooths out as soon as rpm's are up.
How long can you go on a set of factory injectors?
A friend gave me a set of pink injectors from his mustang but I have orange ones in the truck. Just wondering if the swap is possible and what effects it would have. A chart I pulled up showed that the orange ones are #19 and the pink ones are #22.
Still getting around 13 mpg but losing power, wondered if they are worn and putting in to much fuel, or just not giving the proper mist.
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I can't seem to get the engine temp to middle range on the marker, but yet my heater blows "to me" hot air. Even while sitting in idle for extended amounts of time I cannot get it to "operating" temperature. I would think if my thermostat was stuck open my heater would blow either cold or slightly warm air. I have the 5.4L engine with knn air filter and no cats.
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Should brake fluid be changed periodically? If so, how often?
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I just changed my batteries in my truck. Twas the originals still in it. Afterwards, everything works except the radio. I tried everything and no radio. The clock is there when I press the On/Off/Volume. When I press the phone, the display says "no phone". But otherwise I get nothing. I can't even get in the menu to set the clock. I checked the fuses related to the Amp, Subwoofer, radio, Satellite, etc. I did not see anything in the fused under the hood that could be related.
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I have an 11 F350 6.7. It has just under 200K miles on it. Yesterday I changed the oil. Very uneventful. Today however, I was driving home, about 100 miles, and my truck's temp spiked. Not like a little spike, but jumped to the 3/4 mark(if there was one) then slowly kept rising to to the overheat mark. I pulled off onto the hard shoulder waited an hour or so to let it cool down, then finished the drive home. All the way home my temp gauge seemed like it was on some sort of drug. It would jump a needle width when I would have to accelerate, then slowly cool to normal after I got up to cruising speed.
When I got home I checked the oil level and it was spot on in the "normal" range. I haven't used a different type/brand/weight of oil in the last 100k miles. Did something just give out on my truck? I had the coolant flushed and replaced at the dealer within the last 10k miles. Up until this point this truck has been exceedingly reliable. I pull a 13k 5th wheel once a month and drive about 40k-ish miles a year.
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Got a 2015 6.2. No where near time to change plugs, with alot accessories i have installed it would suck if the cab has to come off. Can the plugs be changed with the cab on?
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I have a 2014 f 350 super cab xlt. Ford design engineers should be ashamed. But really who has installed the older (2009 ish) ford seat in there trucks for a little more comfort? How much fabrication was needed? Hate to say it but if I cant put the older truck seats in I'm going to buy GMC. These seats really suck.
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2008 f250 auto
is the trans filter change possible?
i didnt see this in the tech folder and no videos for a 2008
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2003 f250 6" lift on 35s. How to lift the suspension to change out spring bushings? Was thinking using two chain falls on tow hooks on the front, any easier, safe, cheaper way. I have a farm jack but need to weld a plate on bottom of it for more support...
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