Well after about 8 years I finally wore out me first Timbos APPS. I've got a P0122 code just popped up last Thursday. Felt a few odd dead pedal periods which were short lived. I know Monday I've got to order a new one after all those miles of driving.

 I've heard of the timbos apps but what is the difference or advantage over an oem replacement? Just asking.....  

29 minutes ago, Doubletrouble said:

 I've heard of the timbos apps but what is the difference or advantage over an oem replacement? Just asking.....  

Simply there is no electronics on the Timbos APPS. Extremely durable, long lasting, and fully mechanical for Idle Validation Switches (IVS). 

Ok, gonna sound stupid for a second. What is an idle validation switch? 🤔 

There are two idle validation switches. One switch when grounded it will cancel the APPS sensor and set the Cummins idle software which is set for 800 RPM. Now when the second switch is grounded the first switch is open again. Then the Cummins idle software is canceled then the ECM will follow the APPS value. 

 

3 pins in the plug are +5V, APPS sense, and ground. Then 3 other pins are, idle, throttling and ground. Only one IVS can be active at any one time. If two are both off or on it will trip either p0222 or p0223 codes. 

Ok ,thanks for the explanation. 

Even though I've got the p0122 present it still drove ok. Once in awhile it would drop out for just a second or so and pick back up. Mostly in town at 25 MPH because of light throttle needed.

On 11/20/2021 at 12:29 PM, Mopar1973Man said:

Monday I've got to order a new one

Funny that I have a brand new one on the shelf and you don't! I went to install the one I bought from you and discovered my truck already had a Timbos installed!

I still have the original apps on the engine but keep a spare Timbos under the back seat  

33 minutes ago, LorenS said:

Funny that I have a brand new one on the shelf and you don't! I went to install the one I bought from you and discovered my truck already had a Timbos installed!

 

Sold them all...

 

19 minutes ago, IBMobile said:

I still have the original apps on the engine but keep a spare Timbos under the back seat  

 

I will say that Timbos APPS lasted much longer than the factory OE APPS sensor which bare made about 180k on The Beast.

The newest parts store types use a contactless magnetic position sensor for the TPS.

Pros no moving wiper on resistor to wear out.

Cons more electronics to go bad or be affected by an already electrically noisy environment. 

On 11/22/2021 at 5:27 PM, Great work! said:

The newest parts store types use a contactless magnetic position sensor for the TPS.

 

Junk. There again the sensor is based on electronic means to translate simple rheostat and a 2 switches. So far the Timbo APPS lasted over 300k miles and like 8 years. Still cheaper than the Wells Magnetic which can have failures electronically just like the factory OE APPS the failures between the rheostat and the electronics. 

 

 

 

 

 

 

Edited November 24, 20213 yr by Mopar1973Man