Power Problems: Slow Shifting - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 04-23-2008, 11:21 AM Thread Starter
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Power Problems: Slow Shifting

Hey guys,

i am experiencing some power issues with my truck. It shifts smoothly if i accelerate easy and steadily on flat ground. If i am going up a hill however, or accelerate quickly like 3rd+ on a highway onramp, the truck is very reluctant to shift. it takes like 2000+ rpms to shift.

I had it at the ford dealer for the CPS recall and they said the tranny was fine but #8 injector was shot: i.e. running on 7 cylinders, and thus less power available to the transmission to shift. They replaced it and it seemed fine, but no the problem is back.....

I have experienced a little loss in MPGs and I can ocaisionally get it to shift into the higher gears by really mashing down the gas, but this usually causes a pretty dangerous surge that throws me forward.

Any Ideas? HELP PLEASE!!!


Wes

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post #2 of 15 Old 04-25-2008, 03:52 PM Thread Starter
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c'mon guys.....nobody has any ideas...???

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post #3 of 15 Old 04-25-2008, 03:56 PM
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Did it shift fine right after the injector was replaced?

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post #4 of 15 Old 04-25-2008, 03:58 PM
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Will it shift into overdrive, is there a check engine light? Does it feel like it is slipping, or just a late shift.

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post #5 of 15 Old 04-26-2008, 06:02 AM Thread Starter
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it seemed to shift fine after the injector, but it just doesn't seem to have the it punch it used to.

As for the OD, my light has NEVER been on, i.e. no matter how many times i press the button, it will not turn on or off, plus i can't feel it being in or out of OD if i press the button.

is it possible i have a trans without overdrive?

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post #6 of 15 Old 04-26-2008, 01:42 PM Thread Starter
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just drove back up to school....couple big hills at the end: wouldnt get into
3rd until almost 3000rpm! There must be some significant lack of power that is causing this...only other option is maybe my trans fluid needs changing? seems llike this is too serious for that though

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post #7 of 15 Old 04-26-2008, 01:52 PM
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have you had your compute scanned?? i recently have power problems also. ended up being my IDM was dying.

if you see a light at the end of the tunnel, it's probably just a photon torpedo
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post #8 of 15 Old 04-27-2008, 12:39 PM Thread Starter
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have not had it scanned...is it easy to swap for a new IDM or am i gonna have to get the dealer to do that?

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post #9 of 15 Old 04-27-2008, 12:51 PM
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Quote:
Originally Posted by wesjones View Post
have not had it scanned...is it easy to swap for a new IDM or am i gonna have to get the dealer to do that?
it's easy to swap out, you can do it yourself. first, found out what is wrong. if it's IDM, it'll cost you about $1100 for a new one. they are so Ford specific, the IH dealer doesn't have it.

if you see a light at the end of the tunnel, it's probably just a photon torpedo
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post #10 of 15 Old 04-27-2008, 02:26 PM
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Its not a IDM problem, if you light doesnt work, it should come on when you press the button, if no you need to probably replace the button on the shifter. i would have it scanned for codes, it may have some tranny codes. I would NOT spend any money on the IDM.

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