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Posted on Mar 05, 2013

Ford F150 5.4 engine misses at low speed

When driving at a slow speed and going up hill truck misses

1 Answer

A

Anonymous

I would go with the well known COP Ignition Coils
being bad,one or several

Could also be an EGR issue if uphills & vacuum is involved

5 Related Answers

Hayward Cowan

  • 59 Answers
  • Posted on Jan 08, 2009

SOURCE: my 1974 ford pickup/F250 3/4 ton loses power and backfires

It sounds like the timing is off but moore likely it's caused by the point gap being to close due to wear on the rubbing block.
The gap of the points effects the timing.
You probably need to clean and adjust the points.
If that doesn't work try replacing the points and if the old one are pitted, replace the condenser also.
If that doen't work check the coil.

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old marine

old marine

  • 2426 Answers
  • Posted on Feb 25, 2009

SOURCE: Engine goes to low power

I'm guessing when the engine light comes on, the computer is going into a default mode -- enough to keep the engine running, but not efficiently or with power. You need to get the error codes checked to determine what is going bad. It may be a throttle position sensor (TPS), or a crank or cam position sensor, which feed critical information to the computer.

Anonymous

  • 1 Answer
  • Posted on Mar 21, 2009

SOURCE: 1989 Ford F150 standard trans 5.0 engine misses like bad plug or

CRANK YOUR CAR AND ONE BY ONE PULL EACH WIRE UNTIL YOU FIND ONE THAT DOESN'T CHANGE THE WAY YOUR VEHICLE RUNS, RETURNING EACH ONE AFTER CHECKING OF COURSE. IT COULD BE THE DISTRIBUTOR OR THAT YOUR PLUGS ARE FOULED OR EVEN THAT YOU DON'T HAVE ONE OR THE OTHER CONNECTED PROPERLY???

Anonymous

  • 607 Answers
  • Posted on Apr 02, 2009

SOURCE: car missing when driving a slow speed

ck ignition system spark plugs, wires, cap

Anonymous

  • 51 Answers
  • Posted on Aug 25, 2009

SOURCE: my ford ka has lost power when going up hills and over 60mph

was it a second hand motor or reco one if it was a second hand motor then you may have a blown head gaskit

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Why wont my car pick up speed and slow down going up hill.

More than likely it is caused from not getting enough of fuel, Check fuel filter to see if its ok. God-Bless!
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Engine misfires at high rpm no code

Bad ignition coils will make the truck act like this. Also low fuel pressure.
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2006 Ford Five-Hundred. ODBII: P0171, P0174, P061B, P2106

I suggest check the easy things first. Vacuum lines, could cause a lean condition, fuel filter restricting the fuel flow lean condition. Carefully clean throttle body with proper cleaner. I'm a shade tree mechanic but these simple things work sometimes. You didn't mention if you have the cvt trans. If you do and you are going 75 80 on the highway coming to a hill will cause it to race that high. Then when the hill is crested it will slow down, I don't like it either but it is the nature of the beast. I often cancel the cruise on big hills on the highway so it doesn't do that.
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1answer

Did tune up but still acts like it's missing once in a while

skipped filters?
hiccup.s can be lots of things,
so tell when the hicup ,er misfire happens
hot or cold engine. ? or both.
at any speed. , only fast right foot?, or only wide open throttle?
only on hills. ?
so far , no miss at idle or slow speed.
1helpful
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I have toyota axio g grade 2007 december car.what does it mean S & B in gear system.

The short answer:

S is for low speeds with quick pickup.
S is not economical. Thats why the eco light is off.

Use B when you're climbing down steep hills and needs to slow down without overheating the brakes.


The long answer:
  • Brake (B)A mode selectable on some Toyota models. In non-hybrid cars, this mode lets the engine do compression braking, also known as engine braking, typically when encountering a steep downhill. Instead of engaging the brakes, the engine in a non-hybrid car switches to a lower gear and slows down the spinning tires. The engine holds the car back, instead of the brakes slowing it down. For hybrid cars, this mode converts the electric motor into a generator for the battery. It is not the same as downshifting in a non-hybrid car, but it has the same effect in slowing the car without using the brakes. GM called this HR (hill retarder) and GR (grade retarder) in the 1950s.


S has 2 possibilities

  • Second (2 or S)This mode limits the transmission to the first two gear ratios, or locks the transmission in second gear on Ford, Kia, and Honda models. This can be used to drive in adverse conditions such as snow and ice, as well as climbing or going down hills in the winter time. Some vehicles will automatically shift up out of second gear in this mode if a certain RPM range is reached in order to prevent engine damage. Although traditionally considered second gear, there are other names used. Chrysler models with a three-speed automatic since the late 1980s have called this gear 3 while using the traditional names for Drive and Low.
  • S or SportThis is commonly described as 'Sport mode'. It operates in an identical manner as 'D' mode, except that the upshifts change much higher up the engine's rev range. This has the effect on maximising all the available engine output, and therefore enhances the performance of the vehicle, particularly during acceleration. This mode will also downchange much higher up the rev range compared to 'D' mode, maximising the effects of engine braking. This mode will have a detrimental effect on fuel economy. Hyundai has a Norm/Power switch next to the gearshift for this purpose on the Tiburon. GM also used S to indicate a "super" mode, being the same as the 2 position on a Chrysler, shifting between only first and second gears.


Dont use B or S for general driving as both are very low on fuel efficiency.
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Skip or Miss at low speed acel

do a minor tune up .replace distributor cap and rotor.coil spark plugs and wires.change fuel filter.check for intake leaks.at vacuum hoses.check air duct going to the throttle body.if tune up dont help.check engine compression.for weak cylinders and worn valves.
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Car feels like tranny slips or car misses during acceleration

check distributor cap and rotor...check fuel pump ....
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Stalls at low speed when in cruise control

You sould have recieved a "recall" notice in the mail about the cruise control for fire and failure issues. they are adding a fusable link where the cruise control harness connects to the brake master cylinder. if you have not had the recall performed yet you should SERIOUSLY consider getting it done, mainly so it doesnt catch fire, but "could" be the result of the failure you've been experiancing! btw, almost ALL Ford vehicles have been affected with the cruise control recall. hope this helps!
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