Bad Sensor?
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Laughing Gas
Joined: Aug 2009
Posts: 1,192
Likes: 7
From: Belgrade, MT
Bad Sensor?
Went to pull my truck into the shop yesterday morning to do a transmission flush and power steering flush. Was about 20 degrees out, fired right up, but when i hit the go pedal, nothing, just sat there idling like i had never even touched the pedal. As it warmed up, the pedal started to slowly work better. Once warmed all the way up, it was fine.
I assume this is the little electronic sending box on the go pedal?
Thanks, Tom
I assume this is the little electronic sending box on the go pedal?
Thanks, Tom
Logistics Pro
Joined: Mar 2006
Posts: 3,678
Likes: 2
From: Rapid City SD
I seem to remember a similar problem before I changed my CPS? Been awhile since I did it and I have senior moments. Could have been before I changed the up-pipes also, was having problems with the EBPV.
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
There is a microswitch on the throttle pedal that must work or you end up with the problems you describe.
Check to be sure you hear the Idle Validation Switch (IVS).
If it gets dirty, it can become intermittent. Then, the Powertrain Control Module (PCM) thinks the pedal has no foot pressure and remains at idle.
It's just a small microswitch mounted in the Throttle Position Sensor (TPS).
You should be able to hear it "click".
You might try cleaning it with electrical "contact cleaner".
Pop
Check to be sure you hear the Idle Validation Switch (IVS).
If it gets dirty, it can become intermittent. Then, the Powertrain Control Module (PCM) thinks the pedal has no foot pressure and remains at idle.
It's just a small microswitch mounted in the Throttle Position Sensor (TPS).
You should be able to hear it "click".
You might try cleaning it with electrical "contact cleaner".
Pop
Cargo Master
Joined: Jun 2003
Posts: 3,292
Likes: 6
From: Ardenvoir, Washington
Here is a similar thread for more info...
https://www.ford-trucks.com/forums/8...-response.html
https://www.ford-trucks.com/forums/8...-response.html
Hotshot
Joined: Jan 2002
Posts: 17,988
Likes: 207
From: La La Land
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Postmaster
Joined: Dec 2008
Posts: 3,340
Likes: 2
If you turn on the key but don't start press on the pedal and you should hear a slight click and then the same when you let it off. Do this multiple times before and after cleaning.
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