Hi have an ford focus 2.0 diesel auto 2012 and it shudders at 30mph when i accelerate seems like it is under powered so i have to give it more gas

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Loud bang and loss of power - Ford Truck Enthusiasts Forums

www.ford-trucks.com > ... > Diesel > 6.0L Power Stroke Diesel
Dec 11, 2004 - Loud bang and loss of power 6.0L Power Stroke Diesel. ... No matter how much throttle you give it, it won't accelerate. If you get to 2200-2300 ... 4r100 loud bang then nothing
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Loud bang when I tried to enguage 4 wheel drive. Now 4x4 wont ...
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loud bang while in 4wheel drive now 4wheel no ... - CarGurus

www.cargurus.com > Questions > Ford > F-250 Super Duty

CarGurusDec 1, 2014 - 10 mph a very loud snap bang from under the cab (I think) now... ...Could probably hear it from 50 to 75 ... truck - no cut wires - i have no power to my 4 wheel drive button on the inside of my truck ? any ... Used Cars For Sale.

Can i ask you when the last time this car was serviced or how many k's or miles it has done?

Check the ignition system. It may work fine while idling but fail during acceleration. Problem areas to be inspected include the spark plugs, spark plug wires and vacuum hoses. You should look for spark plugs that are covered in oil or sediment or damaged, spark plug wires that have damaged insulation, and vacuum hoses that are unplugged or leaking. The use of a fuel additive that contains both fuel injector cleaner and water remover can fix minor problems due to water in the gas and fuel injector clogs. Check the fuel pressure to test the injection system to assure proper pressure.

COLD START PROBLEM

Its cold start issues:----

Go through the list of help links mentioned below:----

Click the link :----

Cold start problem and vehicle shudder around 2500 to 3500 rpms

http://repairhelpcenter.blogspot.com/2012/10/cold-start-problem-and-vehicle-shudder.html

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Low idle when cold out side?

http://repairhelpcenter.blogspot.com/2011/12/low-idle-when-cold-out-side.html

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Ford explorer 4.0 will not idle when cold?

http://technoanswers.blogspot.in/2012/02/ford-explorer-40-will-not-idle-when.html

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Automatic transmission shift lever hard to move on cold mornings?

http://technoanswers.blogspot.com/2012/01/automatic-transmission-shift-lever-hard.html

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Car won't start when cold?

http://schematicsdiagram.blogspot.com/2011/12/car-wont-start-when-cold.html

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These will help.

Thanks.

Have you checked the wheel balance on the front wheels?

One of the air intake pipes had come loose. Fastened the jubilee clip back up and it was like having a new car!

do you have any oil leaks it sound like either the clutch going out or a contaminated clutch

if its auto it sounds like the transmisson is sllipping no quick fix
if its manual the clucth is slipping try adjusting if there is no adjustment then clutch needs replacing

sounds more like the ECU