Engine hesitation under easy acceleration
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Engine hesitation under easy acceleration
I noticed about 3 days ago that under easy acceleration the truck would hesitate; almost jerk three or four times and then would accelerate normally. It progressively got worse to where it now does it in idle. The spark plugs are only about three months old. What is aggrevateing is that when I went to lunch today it drove fine then when I came home from work it resumed the hesitation. Any help would be greatly appreciated.
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From: Southern Illinois
Just a friendly reminder, always list a your year of your Expedition, engine, and any other possibly helpful information. It helps us in figuring out your problem.
Anyway, I had a similar problem except I threw a check engine light and it narrowed down the problem to the exact cylinder. I would say it's a dying COP (coil over plug as we say it around here). The coil is the "black cap" that sits over each spark plug well. Anyhow its that or a bad wire - the wire that connects the coil to the spark plug. Push the car hard enough and you will get a CEL and be able to have it scanned and find out where the problem is.
Welcome to FTE. Stick around and read and you will learn loads of info for your Expy.
Anyway, I had a similar problem except I threw a check engine light and it narrowed down the problem to the exact cylinder. I would say it's a dying COP (coil over plug as we say it around here). The coil is the "black cap" that sits over each spark plug well. Anyhow its that or a bad wire - the wire that connects the coil to the spark plug. Push the car hard enough and you will get a CEL and be able to have it scanned and find out where the problem is.
Welcome to FTE. Stick around and read and you will learn loads of info for your Expy.
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5.4L or 4.6L engine? You said that the plugs were changed not too long back - do you know if any thing else was done during the tune up? The general consensus is to change plugs, use new rubber boots and wires, and use 8 new COPs. The reason in doing this is because the job is such a PIA, it makes sense just to do it all so one doesn't have to go back and tear into the engine compartment. On top of this, it's not a bad idea to pull the fuel rail and inspect the tips of the injectors. The stock ones can crack resulting in fuel not being sprayed directly into the cylinder and causing hesitation/jerking because the engine is being starved of fuel. When I did my tune up back in March, 3 of my injectors were cracked. It's a pricey job if you do it all, but always worth it. Did you install the plugs or have someone do it (just curious)? Lastly, you are welcome. Hang around here and get educated! 
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I noticed about 3 days ago that under easy acceleration the truck would hesitate; almost jerk three or four times and then would accelerate normally. It progressively got worse to where it now does it in idle. The spark plugs are only about three months old. What is aggrevateing is that when I went to lunch today it drove fine then when I came home from work it resumed the hesitation. Any help would be greatly appreciated.
Our new Ford COP’s, the Sultans of Spark(S.O.S.), have
been designed with both durability and performance in mind.
Please see them at:
http://www.performancedistributors.com/soscoils.htm
Quality was the main feature we stressed when we went to the
drawing board on these coils.
By the way, for those of you who only need to replace a defective coil,
our SOS Coils are available separately.
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i am having the same issue , i had one go bad 5 months ago and that threw a check engine light, but , now the problem resumed, and no CEL, i am waiting to see where this thread goes. i am also having other issues too now. dont worry i am not hijacking this thread.
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I'm putting my money on the injectors. That would be where I would start since it only takes about an hour to check them, and if they are cracked, you know it's the issue.
I would go through and pull them off / inspect, before throwing money at new coils.
I would go through and pull them off / inspect, before throwing money at new coils.
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ford expedition 2006 85000 miles
MY FORD EXPEDITION IS JERKING GOING UP HILLS AND GOING OVER 45 MILES AN HOUR. I THINK ITS FROM NOT SHIFTING CORRECTLY. SOMEONE TOLD ME TO CHANGE THE TRANS FLUIDS FILTER AND PAN. IS THAT A GOOD IDEA?
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Ford truck easy acceleration hesitation forward and reverse
I noticed about 3 days ago that under easy acceleration the truck would hesitate; almost jerk three or four times and then would accelerate normally. It progressively got worse to where it now does it in idle. The spark plugs are only about three months old. What is aggrevateing is that when I went to lunch today it drove fine then when I came home from work it resumed the hesitation. Any help would be greatly appreciated.
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