Ford F-150 (2004-2008) :: Idle Will Drop Down When Stopped And Truck Sounds Like It Is Going To Die
Aug 8, 2015
My friend just bought a 2008 F150 5.4 110k, it ran great all day during all of the test drives, after he gets it home it has started acting up. Most of the time it runs great, but sometimes when you stop the truck the idle will drop down and the truck sounds like it is going to die but so far it hasn't actually died, it starts knocking really badly and runs very rough. If you let it keep running like that it sets P0340. If you rev the truck up it cleans up and sounds fine again and it will even drop back down to a clean idle most of the time. I swapped the cam sensors because it was easy and just to see and it didn't make a difference, I was hoping after switching the sensors the code would switch to the other head but it didn't.
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My F-150 has developed a rattle and vibration at idle that only occurs with the truck in gear and stopped (with the brake depressed.) The noise appears to be coming from the front of the truck, perhaps from the driver's side (though it's difficult to tell while sitting in the cab).
Before I go crawling around underneath with my son holding the brake while the truck is in drive--I would sure like to know where it might be best to point the flashlight.
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I just locked out the cam phasers on a 2005 f150 with a 5.4. It now idles pretty rough. If I blip the throttle the revs will rise and then drop again, and it barely catches in time to prevent a stall. If I continue to tease it this way I can usually get it to stall. I'm getting no CELs or anything, but I intermittently will get a P035x code (it seemed to rove. I've gotten cylinder 1, 4, 6, but not consistently.). I have chased those around by swapping coils, checking/cleaning the connectors, etc.
I am kind of thinking that these codes are a symptom of my idle issues, and not the actual problem. What could I have done wrong? Could it be a vac issue? I had basically the entire ECU harness and all the vac lines disconnected to do the job, but as far as I can tell everything has been reconnected to the correct locations. I did have an SCT tune done to remove the phasers in the ECU. I installed it and still have the issue, so for now I am on the stock tune just to eliminate any variables.
Could my tune be the issue? Is this how you would expect the engine to behave with locked out phasers and no corresponding ECU tune?
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I am trying to solve a mystery on my mom's truck. It's an '06 4.2L F-150 STX with about 133k miles. It had a check engine light on until today- I cleaned the TB and changed air filter yesterday, and both were filthy. Code vanished later on while driving.
I want to check the PCV because the truck idles high and rough in any setting from park to OD, stopped or moving. Worse when stopped though. Entire coil pack has already been changed due to previous misfire problems. This feels similar to a misfire but without the acceleration hesitation. It has also had a recent oil change, and fuel/oil filter change as well.
There is only one hose connecting to the intake on this truck, and it appears to be a vapor line of some sort to the valve cover, but isn't a PCV cause it's just a hollow tube. There is nothing else coming out of the TB at all, except for the throttle control cable. I don't even seen any nipples or connections or holes where a PCV hose or valve should go. I thought it was on the passenger side, under the TB... but there is nothing here at all. I'm stumped.
I am beginning to think the truck just does not have one at all, which I know for a fact is impossible. I have traced every line on this motor from top to bottom, and I do not see it. Should have a heater on it I assume? What else can make the truck so rough? I don't buy it that "it's just that way". That is complete, lazy, BS. I have had/driven many trucks; 4x4s, supercrew, diesels, jeeps, dump trucks... I have NEVER had a truck run as badly and roughly as this one does. Heck, a twin-turbo 700HP diesel doesn't run this roughly.
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I have a 2008 F150 that the battery drains after sitting 4 days or longer. This has happened about a dozen times since I bought the truck and the dealer could never figure out why. Warranty is up now and it is STILL happening! I had corporate office insult me by telling me everything "checks out" and it is just like a cell phone. If you don't periodically charge it up, the battery dies. I asked her where I was supposed to plug my truck in at night and there was silence on the other end. I am 62 and have never had a car or truck do this from just sitting. The dealer insists everything checks out.
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Let me describe this perplexing issue. I have a speratic rough idle problem. When it happens it's almost like the truck wants to stall. Once going the truck is fine. There has never been any acceleration issues, but for a short time the truck would kind of lunge off idle. It hasn't done that for quite some time. I've replaced the fuel filter. There are no vacuum leaks that I know of. I've tried higher octane fuel. I've tried injector cleaner for a month. What should the fuel pressure be and what is the test port located? Is the fuel pump in the tank? If so, whats that big log looking thing behind the gas tank that the fuel lines run to? Also, there are no MIL codes...
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This morning I drove down to unlock my gate and got out of the truck while it was idling. When I got to the gate the truck just stopped running it did not sputter or anything it was like a light switch and just shut off. I got back in the truck and tried to start it but nothing happened starter did not engage at all or even try to run. I put a new battery in it knowing that is not the problem but it will just not start or even turn over.
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A week and a half ago I went out to my truck to go somewhere and I got about 2 blocks away and the truck started running really rough and had a big lack of power, so I turned around and scanned it with my code reader and the codes I got were p2271, p2196, p0303, p0012, p2197, and p2272. since then I've changed all the spark plugs, boots, swapped all the coils and injectors from a great running truck, fuel filter, and the bank 1 upstream O2 sensor.
the other thing that came to mind that could of caused the problem is that a few days before the problem started. I jump started a co-workers car and he hooked the cables up backwards on his car. Could this be the cause of the problems I'm having.
The truck is an 05 F150 FX4 5.4 with 180,000 miles on it.
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So I bought a 2006 F150 stx reg cab with the 4.6l motor with 90k miles on it a few weeks ago. It was in really good condition and I couldn't pass the deal up. All in all, I love this truck. However at idle the truck is a bit rough. No check engine light, but a bit rough non the less. So I hooked up my obd2 torque app and I see I have anywhere between 6 and 60 total counted misfires, but none detected by individual cylinder. So I ran a scan and have a B1360 code without the CEL on. So I changed the plugs and coil packs and cleaned the k&n filer (non cold air filter, just a replacement k&n) and I still have all the symptoms and the b136p code. So I Google the b1360 code and there's very little on it. Basically says open circuit ignition.
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My 2004 f150 has always been great to me. all the way till now at 255k miles. My truck is misfiring really bad. Here are the codes I have :
P0506 low idle (because of the misfire)
P0356 ignition coil F (6) primary/ secondary circuit
P0308 Cylinder 8 misfire
P0174 system too lean (Bank 2, right side of engine)
p0316 misfire detected on startup
This problem happened 2 days ago. I reset the codes and they all come back together in 10 minutes. the misfire is very bad. I wonder why coil 6 has a fault code but number 8 has the misfire code.
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I just installed glow plugs, ucvh, stage 2 rosewood injectors, t500, ipr and gear head tunes. I have out 97 miles on the truck since all this was installed and the truck seems to run okay but has a rough idle and sounds like there is a mis? What should I look into first?
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I have been noticing that the idle in my car while stopped at a light will sometimes drop to 500 rpm. This makes the car feel shaky at idle. As soon as I put it into neutral or reverse the rpm jump to 750 rpm. Intermittent issue, what this could be??? Its probably happened 3-4 times in the last 6 weeks. Its annoying.
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I have done everything I can think of to this car. New; plugs, wires, distributor, battery, fuel pump, fuel filter, relay, and electrical lines to fuel pump. The timing belt is fine. The car has a rough idle and when I am stopped the RPM's drop below normal. Now it won't start. What can I try now?
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Just got 2005 screw fx4. Seemed to run ok 115000 mi.Had exhaust leak,I put on 3" cat back on. Then I noticed tapping at front of the engine.Turns out tim. chain guides are broken. looks like very common prob after reading many forum/threads. Anyway got timing chain kit, phasers, selinoids. Truck runs and sounds great.But so far had truck back 2weeks stalled 2x at idle.What next??
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I have a 2004 Explorer 4.0L with 190,000 miles. My wife was driving it and the vehicle stopped moving. Sounds like the torque converter whining and will not drive in any gear or 4wd.
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Drive a 2004 Ford F150 4.6L V8 EXT CAB. It has 71,000 miles on it. Truck runs great, doesn't stall or miss and idles good but my gas mileage lately has been very bad. Oil, air filter and fuel filter have been changed. What could cause this?
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Its actually on a 2008 E350 with a 5.4 but figured its all the same. There is a squeal that sounds like a bad pulley but its coming from the flexplate or torque converter. I have taken the belt off to verify. I dont see anything psychically wrong like cracks, bends or anything touching. The little I can find on this subject I would say flexplate has a crack somewhere. Transmission shop also can not figure it out. I just want assurance before pulling the transmission in this beast.
Here is a video : [URL]......
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I came out to my car to go to work and it sounds like a Mack truck idling roughly. I'm trying to get a hold of my mechanic to confirm the problem before calling the police and AAA and my insurance. He hasn't called back, so I'm dead in the water sitting in my car.
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so im a fairly new owner of a 2008 f150 lariat 4x4 5.4l3v bought in September of 2013 with 32358 miles. this engine was built in 10/9/2007 and was just before the spark plug update so I have the black cop on this engine. and on cold day start ups it sounds like a diesel till warm and then it still has a slight knock to it vary slight is this normal or is this a tall tail sight of the phaser issue or spark plug issue coming to light love this truck and will fully rebuild it if I know what to do, ford dealer says that its normal and that if I lose power at some point I will need a new engine with this low mileage.
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I recently bought a 2006 STX with the 4.6 engine. Occassionally, when stopping at a light, the engine will stall. I took it to the dealer where I bought it and he put it on the computer and found that once on a test drive the RPM's dropped to 490, but it did not stall. He said everything checked out fine and thought it might be a carbon build up, since the truck only has 27,000 miles on it and was driven only around town. He suggested a couple of tanks of higher octane fuel and a fuel additive to remove the carbon.
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As the title says I have noticed a strange sound on start up in the last couple weeks that sounds like rocks in a can. Noticed only at start up and then stops but I have noticed it slightly infrequently when driving. Truck runs great, no noticeable problems. I have looked under the hood and suspension to see if something maybe hung up and didn't see anything. Thought this might be the problem since I was following a plumbing truck that had plastic buckets flying out the back and I hit one!
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