Question about Ford F-250

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Truck takes off but turbo doesnt spool and wont shift

Truck takes off but turbo doesnt spool and transmission wont shift until you ease up off throttle but is very sluggish taking off

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Turbocharged diesel engines require some back pressure in the exhaust system. if you straight piped it, it won't make any power.
check vss in trans and exhaust sys for a problem.

Posted on Jul 21, 2009

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To have boost you have to have fuel,check your fuel preasure,if that good next thing you have to have is air, check air filter, if it good next( do you have a cac,charge air cooler it coul be were your boost is going if its cracked) next you need to check you waste gate it could be stuck open,you can always email me for more help wilsodfarm@yahoo.com

Posted on Jul 27, 2009

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1 Answer

Got the f250 started but the turbo wont spool up


if the tubo wont spool up its probably seized,
remove the intake tube, with engine off and see if it will spin, if it wont spin then probably seized. the oil line could be plugged, remove the oil line and squirt WD 40 then fresh motor oil in it and turn the turbine by hand back and forth until you free it up. a pipe cleaner in the tube will clean residue out.
if you get it to spin check the oil pressure to the turbo, should be above 30 psi.
keeping clean oil in the engine (regular oil changes) will keep this lubed. remember the turbo spins at speed of 10000 rpms, so clean oil is esential.

May 20, 2014 | Cars & Trucks

3 Answers

My 1992 pajero could hardly shift to the 4th gear and thus could not reach to turbo level.


If its having difficulty moving through the gears it could be a transmission issue or the turbo could be bad which would also cause a bogging down situation.

May 29, 2011 | 1992 Mitsubishi Montero

1 Answer

Transmission wont shift into any gear


if you can shift gears with car off might be the clutch or slave cylinder. If you can start the car in gear,clutch pushed in and doesnt try take off probally not slave cylinder. But if it tries to take off,slave cylinder. Now if it doesnt try to take off,ease clutch out. Does it move or just rev up? If it revs up likely the tranny. But if it moves can you shift thru all gears,if so clutch is shot.

Feb 27, 2010 | 1995 Toyota Camry

1 Answer

1990zx non turbo, car doesnt always shift out of first gear.


Check fluid level first. The throttle position sensor could be faulty or misadjusted.It should be .4 - .5 volts when fully closed and 4.0 volts wide open throttle.
Next check line pressure. Line pressure at idle in drive should be 61 - 67psi.
If the line pressure is ok it will be an internal problem.

Dec 11, 2009 | 1991 Nissan 300ZX

1 Answer

Had starter rebuilt and now transmission not


the transmission need to me check, the automatic cluch is not releasing, thats why is open at high rave

Nov 10, 2009 | Mercedes-Benz 400-Class Cars & Trucks

1 Answer

1997 Suburban 4x4 5.7L Transmission whines until it shifts


You rear planetary set is worn from a restricted cooler.

May 06, 2009 | 1997 Chevrolet Suburban

1 Answer

Turbo spooling too high


Sounds like the gate valve is stuck. This valve dumps excess pressure when the turbo makes it.

Dec 14, 2008 | 2006 Dodge SRT4

1 Answer

2006 9-3ss 2.0T petrol, runs OK but not as it should. Turbo seems to spool up OK but when coming off throttle you dont have that crisp dumping sound as it did. Also travelling at speed (160km/h)and you...


There may be a loose or split intake (Boost) hose.
You may need to have boost pressure checked.
The transmission kicking down may also be caused by low boost pressure as the transmission receives boost pressure, to regulate shift pattern.
Hope this helps.
Regards MMP

Aug 04, 2008 | Saab 9 Cars & Trucks

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