Hemi throttle issues. Long post warning:)
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Joined: Mar 2009
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From: Pennsylvania
Just an update:
1. The TPS recalibration doesn't do diddly $hIt. I followed the instructions on here to a "T" and my truck drives like it always has, with the dead spot right off idle. I'm going to venture to say it's a mind over matter solution. You THINK you're doing something, so it must be helping
2. The TPS is an integral part of throttle body on the Hemi. Like I thought. Both Auto Zone and my dealer verified that info this morning. Not sure where you guys thought you could just replace the TPS.
I suppose I'm going to drive the truck until it throws a CEL or catches fire. No sense trying to diagnose it until then. It sure sucks when you lose throttle control going down the highway.
1. The TPS recalibration doesn't do diddly $hIt. I followed the instructions on here to a "T" and my truck drives like it always has, with the dead spot right off idle. I'm going to venture to say it's a mind over matter solution. You THINK you're doing something, so it must be helping
2. The TPS is an integral part of throttle body on the Hemi. Like I thought. Both Auto Zone and my dealer verified that info this morning. Not sure where you guys thought you could just replace the TPS.
I suppose I'm going to drive the truck until it throws a CEL or catches fire. No sense trying to diagnose it until then. It sure sucks when you lose throttle control going down the highway.
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Joined: Jul 2007
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From: South Georgia/East Florida
Technically, when it got moved from the TB, to the top of the gas pedal, it became known as the APP sensor (accelerator Pedal Position), same function, different name...
However, I've found that a lag in a certain RPM range, is often caused by a faulty EGR, one that hasn't completely failed, so no CEL, but is acting up.
However, I've found that a lag in a certain RPM range, is often caused by a faulty EGR, one that hasn't completely failed, so no CEL, but is acting up.
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Professional
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From: Pennsylvania
Technically, when it got moved from the TB, to the top of the gas pedal, it became known as the APP sensor (accelerator Pedal Position), same function, different name...
However, I've found that a lag in a certain RPM range, is often caused by a faulty EGR, one that hasn't completely failed, so no CEL, but is acting up.
However, I've found that a lag in a certain RPM range, is often caused by a faulty EGR, one that hasn't completely failed, so no CEL, but is acting up.
All right smart ***.... you could have said that 2 pages ago. J/K
I will check into that one. You know anyone that's had to replace it? Just curious.
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Joined: Jul 2007
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From: South Georgia/East Florida
No, and I knew it was not on the TB anymore when I answered your post earlier, but actually found out that the name was changed when I called my parts guy at the dealership here.
He had a part number for the pedal assembly with the sensor, but not just the sensor. Two different assemblies also, one for the moving pedals and one for the none moving ones.
He told me he has NEVER had to order one, for their service dept or a customer, so I would say they rarely go bad. If it were me, and I struck out on the recalibration, I'd look at the EGR and possibley clean the TB
He had a part number for the pedal assembly with the sensor, but not just the sensor. Two different assemblies also, one for the moving pedals and one for the none moving ones.
He told me he has NEVER had to order one, for their service dept or a customer, so I would say they rarely go bad. If it were me, and I struck out on the recalibration, I'd look at the EGR and possibley clean the TB
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From: Pennsylvania
No, and I knew it was not on the TB anymore when I answered your post earlier, but actually found out that the name was changed when I called my parts guy at the dealership here.
He had a part number for the pedal assembly with the sensor, but not just the sensor. Two different assemblies also, one for the moving pedals and one for the none moving ones.
He told me he has NEVER had to order one, for their service dept or a customer, so I would say they rarely go bad. If it were me, and I struck out on the recalibration, I'd look at the EGR and possibley clean the TB
He had a part number for the pedal assembly with the sensor, but not just the sensor. Two different assemblies also, one for the moving pedals and one for the none moving ones.
He told me he has NEVER had to order one, for their service dept or a customer, so I would say they rarely go bad. If it were me, and I struck out on the recalibration, I'd look at the EGR and possibley clean the TB
I just did a search on the net about the APPS. But I'm not throwing any codes. Just the lightning bolt flashes once or twice then the truck will run fine for a while.
The other thing is I'm finding conflicting info on where this sensor is located. Some say under the dash, while others say it's under the battery box. Well, which is it?
Is this a dealer only part or what? None of the online OEM sites list it. It seems to be a big problem with the Cummins, not the Hemi's.
Last edited by Trigger; Jun 22, 2009 at 10:42 PM.
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From: CA
Anything can break or go bad even if it's uncommon...i'm also leaning towards the pedal assembly like the other guys. Before buying a new one (from what i've read they're $400+) i'd remove the assembly and see if anything jumps out at ya. The APPS should be removable although not sold separately which is covenant DCX...or whatever they're calling themselves now-a-days. The bone yard would also be a good place to look for a swappable unit to use and/or help troubleshoot with.
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Joined: May 2007
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From: Milledgeville, GA
Just an update:
1. The TPS recalibration doesn't do diddly $hIt. I followed the instructions on here to a "T" and my truck drives like it always has, with the dead spot right off idle. I'm going to venture to say it's a mind over matter solution. You THINK you're doing something, so it must be helping
1. The TPS recalibration doesn't do diddly $hIt. I followed the instructions on here to a "T" and my truck drives like it always has, with the dead spot right off idle. I'm going to venture to say it's a mind over matter solution. You THINK you're doing something, so it must be helping
You're obviously having more serious throttle issues so it's hardly a surprise when it didn't work for you. It's still easier to try the free fixes before spending money.
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From: Pennsylvania
Guys the following is pictures taken by me removing the APPS on my 04 Hemi. It's NOWHERE near the pedal. There is a cable running from the pedal to a small black box under the battery tray. Inside this plastic box is a simple rheostat that plugs into a harness, that leads to the throttle body.
Here is the box opened so I could unplug it and clean the connections:
Here is the location of the APPS. It's easiest to remove the inner fender and work at it that way:
And the final one is the gas pedal cable from inside the truck:
After talkng to my dealer. The part does NOT come with the pedal. It is only the box and cable.....for $300. OUCH. I'll try to milk this one for as long as possible or until I get a code.
Here is the box opened so I could unplug it and clean the connections:
Here is the location of the APPS. It's easiest to remove the inner fender and work at it that way:
And the final one is the gas pedal cable from inside the truck:
After talkng to my dealer. The part does NOT come with the pedal. It is only the box and cable.....for $300. OUCH. I'll try to milk this one for as long as possible or until I get a code.