97 f250 throttle - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 19 (permalink) Old 06-15-2019, 02:28 AM Thread Starter
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97 f250 throttle

I have a 1997 that has recently lost power.

It will barely respond to input from the pedal on the stock tune and only build about 5 psi, with the chip on setting 6 it will go faster and make around 14-16psi.(same issue with chip removed).

I’ve checked for boost leaks, and found no issues. The engine revs very slow, like only applying 1/4 throttle.

AE scanner shows throttle is always at 0, but the engine is responding to input, just not very much.


Anyone heard of a problem like this and have suggestions?
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post #2 of 19 (permalink) Old 06-15-2019, 03:52 AM
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Re: 97 f250 throttle

How did your problem start? We're you going down the road and randomly lost power? We're you at a stop light and it suddenly wouldn't do anything when you mashed the throttle? Or was it fine, then you started it one morning and this happened?

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post #3 of 19 (permalink) Old 06-15-2019, 04:08 AM Thread Starter
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Re: 97 f250 throttle

Just got in and started it the other day in the driveway, noticed when driving away it didnít feel right.
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post #4 of 19 (permalink) Old 06-15-2019, 04:34 AM
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Re: 97 f250 throttle

Do you hear the IVS clicking when you work the throttle pedal?

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post #5 of 19 (permalink) Old 06-15-2019, 04:53 AM Thread Starter
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Re: 97 f250 throttle

Yes, I donít think the truck would accelerate at all of that switch wasnít working.
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post #6 of 19 (permalink) Old 06-15-2019, 06:38 AM
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Re: 97 f250 throttle

It's not supposed to anyway, but your scanner showing a goose egg when you step on the throttle makes a guy wonder. Since your OP says you have the same problem with the chip removed, it seems to me like it's next in line. It's simple and free to check, so that's where I try to start.

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post #7 of 19 (permalink) Old 06-15-2019, 01:26 PM
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Re: 97 f250 throttle

Here are the Into and Pinpoint tests for the Accelerator Pedal Sensor. Cheers!
Attached Files
File Type: pdf Accelerator Pedal Intro.pdf (359.5 KB, 8 views)
File Type: pdf Accelerator Pedal Pinpoint Tests.pdf (364.7 KB, 7 views)

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post #8 of 19 (permalink) Old 06-15-2019, 03:05 PM
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Re: 97 f250 throttle

Scanners cannot read accelerator pedal position on an OBS, itll have to be done with a multimeter. I'm willing to bet something going in with the pedal.

Does it run fine otherwise?
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post #9 of 19 (permalink) Old 06-15-2019, 08:45 PM Thread Starter
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Re: 97 f250 throttle

Quote:
Originally Posted by Lt.Dan View Post
Scanners cannot read accelerator pedal position on an OBS, itll have to be done with a multimeter. I'm willing to bet something going in with the pedal.

Does it run fine otherwise?
That is good to know, Iím gonna check it when I get a chance in the next couple of days.

Yes runs and idles smooth.
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post #10 of 19 (permalink) Old 06-16-2019, 10:13 PM Thread Starter
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Re: 97 f250 throttle

Checked voltage at the pedal. .558v idle position and 3.97 wot

I took a video
Problem:

Problem with chip on position 6:

Last edited by F350 F350; 06-16-2019 at 10:15 PM. Reason: Labeled videos wrong
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