Stumbling at idle and at speed
Champion
Joined: Jul 2011
Posts: 3,053
Likes: 28
From: Mopar HQ
This issue had gone away for a couple years and is back again, I hadn't gotten the TPS replaced. Here are some new things I learned:
This past week I was driving on the interstate and it started happening really bad followed by my engine light flashing. Then about 30 seconds later the engine light stopped flashing, it went completely off. I went to O'Reilly's to get the code checked which rendered "P0594 Cruise Control Servo Control circuit / open".
Do you think my issue here is actually my cruise control even though it happens while I'm manually controlling my throttle? Or do you think the TPS is still the root issue and the error code is the cruise control noticing the TPS is being weird?
Thanks,
Jake
- It happens between 1k and 1.5k RPMs
- If I push harder on the throttle it can get to 2k and stop studdering
- It happens with or without cruise on
- It always happens after driving longer distances (I don't drive this vehicle very far)
- It usually starts on the interstate after driving more than 20 miles
- It will continue at lower speeds once exiting interstate.
- If I adjust my speed on the interstate so that my throttle is barely pressed, it seems to stop
This past week I was driving on the interstate and it started happening really bad followed by my engine light flashing. Then about 30 seconds later the engine light stopped flashing, it went completely off. I went to O'Reilly's to get the code checked which rendered "P0594 Cruise Control Servo Control circuit / open".
Do you think my issue here is actually my cruise control even though it happens while I'm manually controlling my throttle? Or do you think the TPS is still the root issue and the error code is the cruise control noticing the TPS is being weird?
Thanks,
Jake
We are sorry to hear about the concern you are experiencing. Are you considering having this addressed by your dealer? If you are interested in any additional assistance on our end, please private message us!
Laura
Dodge Social Care Specialist
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Joined: Jul 2017
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Okay, got it tested. I tested the resistance between the hot (5V) wire to the signal wire while unplugged, just to see that the potentiometer was working as expected. Next I plugged it back in and tested the voltage between the signal wire and ground. In both yesterday I slowly depressed the throttle and neither had any outliers, voltage moved from .6V to about 3.4V.
This shouldn't necessarily be surprising though, because my truck works fine for in town driving. I should probably redo this test after driving for 20 miles, once it starts stumbling. Thoughts?
Does it make any sense at all that the TPS could be faulty only after driving for 20 miles? It doesn't really make sense to me, because a potentiometer shouldn't be affected like that, unless it has something to do with heat...
Jake
This shouldn't necessarily be surprising though, because my truck works fine for in town driving. I should probably redo this test after driving for 20 miles, once it starts stumbling. Thoughts?
Does it make any sense at all that the TPS could be faulty only after driving for 20 miles? It doesn't really make sense to me, because a potentiometer shouldn't be affected like that, unless it has something to do with heat...
Jake
All Star
Joined: Mar 2015
Posts: 752
Likes: 24
If you havent already I'd get the Dodge TPS in it an then reset /retest. .
Countless threads here on site with trouble off aftermarket Tps,02,cam,crank sensors,etc !
Countless threads here on site with trouble off aftermarket Tps,02,cam,crank sensors,etc !
Last edited by hidden1; Sep 15, 2019 at 07:51 PM.
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Joined: Jul 2017
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Sorry I just keep this thread going... I drove into work finally, which normally causes this issue to appear. Well yesterday it didn't on the way to work or on the way home..
Then I realized between the last time this happened and now - I finally fixed an exhaust manifold leak. This is had been happening for a long time and just been putting it off (I know I should've done it sooner). Is there any way the exhaust manifold was causing this stumbling? Or is it just a coincidence that it didn't do it this time?
Jake
Then I realized between the last time this happened and now - I finally fixed an exhaust manifold leak. This is had been happening for a long time and just been putting it off (I know I should've done it sooner). Is there any way the exhaust manifold was causing this stumbling? Or is it just a coincidence that it didn't do it this time?
Jake