2001 ram 3500.. edge comp/smarty ..

So been having a problem with a stutter under throttle .. 3/4 ish throttle.. I re adjusted the factory made no difference and tps% was reading 8% at idle 77% wide open .. I ordered a timbo which I think is a rip off but anyways.. installed it now it want read below 13% throttle at idle .. I removed it from bell crank to make sure and still 13%.. so I installed it and when I did the adjustment procedure.. I had to move the idle screw in all way to the bottom to get it to move and now my throttle is around 1/2 way.. yes its int the range it called for 580-700 its at .666 and I moved till it voltage came up and then turned back to volts went back.. throttle feels good and stutter done seem as bad but not with idle at 13% CANT get my high to kick on because of it .also remove factory from bell crank and throttle read 1.6% but when goes on bell crank was 8%..also I can not get my obd reader pickup anything for the iat sensor just says n/a and checked connections all are good

Edited January 8Jan 8 by stvncwby

Do you have any DTC's set, especially related to the APPS?

 

If you don't, I don't think the APPS is causing the problem.  You might try another scan tool just confirm the same readings.

 

Does the engine idle at the correct rpm?

 

I think I would start by checking all battery connections and grounds to make sure there are no issues there.  I would also completely disconnect the Edge tuner and put the Smarty back to stock while troubleshooting just to eliminate potential issues.

 

- John

 

 

no trouble codes what so ever even the factory apps didnt give me none.. just cant figure out why reading so high throttle % and also cant get the IAT to read on the obd2 scanner using a different scanner my other one use to read it waiting for my new one to come in now i know will read it.. yea iam try saturday to go thru all the grounds and do the w-t mod been reading up on it looks like a fairly easy task to do.. just didnt understand once i hooked the factory apps up and no on the bell crank read 1.6% but the timbo read 13% thats a big differnce i drove with the timbo on this morning and seems fine no codes and set properly

 

 

Since the ECM is the only component that communicates with the APPS, it would be a good idea to re-check connections for resistance and make sure the ECM has a good positive and negative connections.  You will be addressing the ECM ground with the W-T ground reference modification.

 

- John

 

yea i will check them again idk why anything would change though and why the timbo is 12% higher whats got me racking my brain.. on or off the bellcrank but the factory lowest i got it on bell crank was 5% and had it throwing low voltage code when i set it to that

 

12 minutes ago, Tractorman said:

Since the ECM is the only component that communicates with the APPS, it would be a good idea to re-check connections for resistance and make sure the ECM has a good positive and negative connections.  You will be addressing the ECM ground with the W-T ground reference modification.

 

- John

 

check restitance you mean ohm the wires out or check for voltage? do you happen to know what voltage for each of the wires should be with key on not running ?

 

I don't know the voltages of each wire, but there are two ground connections that can be checked with an ohmmeter.  Both are grounded through the ECM (pins #11 and #32 on the ECM).

 

I would do the W-T wiring mod first, then start with diagnosing the APPS, if the symptoms aren't corrected.

 

- John

 

sounds good looking like about 7-10 inch of snow friday so if i can make it home befor then iam going to try and diagnose this do the wt mod 1st then if still exist will continue forward.. trying to get the 0% trottle to make my high idle kick on it worked last year but now this year want with percenatge to high

just for testing purposes i checked the noise on the alternator .. volt meter i keep in truck is not the best but works.. turned to acv only 2 settings was 200 or 500 i set on 500 also had a hv out beside it  and it read 035  had heater on wide open and had the radio on also so iam assuming got quiet a bit of noise coming thru them wires on the front of the motor 

 

Edited January 8Jan 8 by stvncwby

1 minute ago, stvncwby said:

turned to acv only 2 settings was 200 or 500 i set on 500 and it read 035

 

200 or 500 volts, or 200 or 500 millivolts?  Your test results:  35 volts or 35 millivolts (.035 volts)? 

 

Need to be clear on this.

 

- John

meter doesn't say if its mv or volts just says 200 or 500

also I didn't disconnect the 140 amp fuse or the field wires so iam have to retest this and get the correct numbers

Here's is the test results and pictures.. with truck running field lead and 140 amp disconnected everything off in the truck idling it read 000 nothing didn't get feed back till I plugged up the field lead.. same reading if was on 500 was same just 046 & 027

Edited January 8Jan 8 by stvncwby

All your testing are no good. You need a DVM capable of less than 2 volts AC with multiple frequencies, not just 60 hz. A household DVM will do this, which is why your test data is confusing. 

 

Look for a DVM like a Fluke or SnapOn DVMs which are very capable of multifrequencies and voltages less than 2 volts.

 

Just look your DVM has a 200 VAC setting too large. Needs to be 2 VAC or less.

Okie ill look at my other meter at the house when i get home tommorow and see what it reads if not ill get my pops he has a fluke or 3. Also the 140 amp and the field lead need diconnected while running to test ?

Edited January 9Jan 9 by stvncwby

2 hours ago, stvncwby said:

Also the 140 amp and the field lead need diconnected while running to test ?

 

Incorrect.

 

The purpose of the test is to see how much AC ripple is present FROM THE ALTERNATOR while the alternator is charging.  Just make sure the grid heaters have finished post cycling and that there are no other heavy electrical loads operating.

 

- John

 

 

Oh i was going by the old post by moparman that said to disconnect them 🤷

Yeah I need to possibly update my articles. 

Could you point out that page for me?

 

Okie i did the m-t mod tonight ran a 2 gauge wire to alternator rants the ground to the side of crank case cover by vp44 and ran a ground to it pretty simple job added a 150 amp fuse on the postive battery at the passenger side.. checked the tps% same as was before i got to my better scanner had codes for apps sensor high voltage.. but i set it till it reved up then back it off but as I said I had to turn screw in almost all the way to make it early idle up.. stock sensor reads lower but still around 6-8% not 13% like the timbo.. i did the pedal reset like timbo says.. didn't change anything.. so I have the battery cables unplugged and after doing all this no codes stored also i didn't have a check engine light they was just in there on scanner.. so I will put battery cables back on tommorow and see if that does anything to help it if not idk what todo next

On 1/8/2025 at 10:08 AM, Tractorman said:

I don't know the voltages of each wire, but there are two ground connections that can be checked with an ohmmeter.  Both are grounded through the ECM (pins #11 and #32 on the ECM).

 

Did you perform the above test?

 

10 hours ago, stvncwby said:

i got to my better scanner had codes for apps sensor high voltage

 

What code number was set?  You say "codes", not "code" - what other code numbers were set?

 

- John

Was voltage high for tps sensor.. also my little scanner has 2 absolute trottle percentages 1 says 0... other  says 12% but when inhit trottle they both go up .. inreset the apps timbo again the set screw bottoms out and the sensor barely moves 1% so screw is all the way in to set the sensor to correct settings 

I have not done the testing grounds yet .. i assume just ohm them out make sure they are correct from ecm to the pins on the apps plug?

Edited January 10Jan 10 by stvncwby

Shaking my head. 

 

 

If it's a Timbos there is no voltage to set. Just be sure the bellcrank hits the idle contacts.