Unwanted Acceleration Low Rpms Manual

[BetterThanMine]

Update: Have an schduled appointment at the dealer for some other stuff and asked about this, its normal. I've sinced tried it in third as well. Its the car preventing a stall condition.

First Off: V6 w/Manual Trans

I noticed at low RPMs, say 1st gear trying to roll along sub 5mph when bordering 4mph the vehicle will accelerate on it own. Suddenly going from the 4/3 mph I'm trying to roll along at bouncing up to 6/7mph fighting my braking input.

I tested this in second and it does the same.

Is this normal? Is it trying to prevent a stall condition? If this is normal, can I disable it, I dont like it.

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[JT1]

First Off: V6 w/Manual Trans

I noticed at low RPMs, say 1st gear trying to roll along sub 5mph when bordering 4mph the vehicle will accelerate on it own. Suddenly going from the 4/3 mph I'm trying to roll along at bouncing up to 6/7mph fighting my braking input.

I tested this in second and it does the same.

Is this normal? Is it trying to prevent a stall condition? If this is normal, can I disable it, I dont like it.

Only the first mile when the engine's cold?

 

[BetterThanMine]

Only the first mile when the engine's cold?

Its more aggressive as I found out today when its cold, I usually let it warm up. I found the thread talking about the cold start acceleration after posting this. Happens when it's warmed up too after a 20 miles of stop and go highway driving.

Best way to describe this is it feels like the throttle is sticking open while the vehicle activates ABS to push through my braking during the pulsing. Like an emergency stop at speed. But going 5 mph lmao. Its jarring.

If stallantis wasnt being anti repair, I would have recorded rpms, throttle position, brake and gas pedal state and all that in a log with my autel by now to see if an input is going bonkers.

 

[JT1]

Its more aggressive as I found out today when its cold, I usually let it warm up. I found the thread talking about the cold start acceleration after posting this. Happens when it's warmed up too after a 20 miles of stop and go highway driving.

Best way to describe this is it feels like the throttle is sticking open while the vehicle activates ABS to push through my braking during the pulsing. Like an emergency stop at speed. But going 5 mph lmao. Its jarring.

If stallantis wasnt being anti repair, I would have recorded rpms, throttle position, brake and gas pedal state and all that in a log with my autel by now to see if an input is going bonkers.

If you push in the clutch, does it rev to 1400 or so and sit there?

I would confirm all the fuses and relays under the hood are seated, mine had some weird issues early on. Also, have you turned off the hill start assist? Mine was really hard to drive when it was enabled.

 

[BetterThanMine]

If you push in the clutch, does it rev to 1400 or so and sit there?

Ill have to check this as it's repeatable, but given the acceleration I'm guessing it is. The engine didnt get too loud, the pads rubbing as it pushed through the braking was more audible. I was more focused on not hitting anyone in the busy parking lot. Shots fk'n nerves out.

I would confirm all the fuses and relays under the hood are seated, mine had some weird issues early on. Also, have you turned of the hill start assist? Mine was really hard to drive when it was enabled.

Hill assist is off and I checked the fuses when I got it but I'll do another pass. Some were questionable.


I think I'm gonna visit the dealer and see if I can get them to print out some info on operation of emissions related to cold starts, manual transmission controls related to computer management and the electronic throttle body operation.

 

[JT1]

Ill have to check this as it's repeatable, but given the acceleration I'm guessing it is. The engine didnt get too loud, the pads rubbing as it pushed through the braking was more audible. I was more focused on not hitting anyone in the busy parking lot. Shots fk'n nerves out.



Hill assist is off and I checked the fuses when I got it but I'll do another pass. Some were questionable.


I think I'm gonna visit the dealer and see if I can get them to print out some info on operation of emissions related to cold starts, manual transmission controls related to computer management and the electronic throttle body operation.

Mine has never done it once it was warm, and I don't know anyone with a 24 manual, but mine was 100% controllable. Just push in the clutch and see what it revs to. Maybe a bad throttle map or a bad throttle body that won't close like it's supposed to.

 

[BetterThanMine]

Mine has never done it once it was warm, and I don't know anyone with a 24 manual, but mine was 100% controllable. Just push in the clutch and see what it revs to. Maybe a bad throttle map or a bad throttle body that won't close like it's supposed to.

Possible, the RPMs feel like they hang long enough points that its not normal, enough so lately that I was considering taking it in.

 

[JT1]

Possible, the RPMs feel like they hang long enough points that its not normal, enough so lately that I was considering taking it in.

Yeah, if your temp gauge reads operating temp and it is still doing it, then I'd make an appointment.
Last thing you want is to run it into a parked car, or your house

 

[BetterThanMine]

So update on this:

I scheduled an appointment at the dealer for some other stuff and asked about this.

Its normal, its the car preventing a stall condition as I was suspecting. I dont like it, but oh well...

 

[AtoB]

yeah... mine will do the same if I dont let it idle for a minute... its annoying to have to wait all the time for it to settle down,

 

[gdeyarmond]

Update: Have an schduled appointment at the dealer for some other stuff and asked about this, its normal. I've sinced tried it in third as well. Its the car preventing a stall condition.

First Off: V6 w/Manual Trans

I noticed at low RPMs, say 1st gear trying to roll along sub 5mph when bordering 4mph the vehicle will accelerate on it own. Suddenly going from the 4/3 mph I'm trying to roll along at bouncing up to 6/7mph fighting my braking input.

I tested this in second and it does the same.

Is this normal? Is it trying to prevent a stall condition? If this is normal, can I disable it, I dont like it.

That's pretty standard in modern manuals. Our GTI had an insanely tall 1st gear and would approach 15mph if you just let off the clutch. My Tacoma has a super short 1st gear and maybe does 5mph if I just let it go..... I wouldn't let the Jeep dealer touch your Wrangler over something like this....but that's just my opinion.

 

[BetterThanMine]

That's pretty standard in modern manuals. Our GTI had an insanely tall 1st gear and would approach 15mph if you just let off the clutch. My Tacoma has a super short 1st gear and maybe does 5mph if I just let it go..... I wouldn't let the Jeep dealer touch your Wrangler over something like this....but that's just my opinion.

Oh, no work to be done. Totally normal, which I suspected. In 1st it wont drop below 800rpms or so in first and keep going around 4mph while in second it seem to be 7-6mph and 16mph in third. Last manual I owned was an 01 Celica about 8 years ago that would happily let me stall it, and the cars I worked on at caddy rarely needed any extensive test drives so I never encountered it. Drive by wire antics... all my previous vehicles had cable connections to throttle body.

Im taking it in becuase the throttle hangs like crazy and I dont remember it being like that initally and I'm smelling friction material while in 4th gear off and on

The throttle thing threw the service writer, but he didnt seem surprised at all about the clutch... on a 24... with less than 3k miles.

Honestly if I had access to dealer info I would've hooked an o-scope up and my autel by to see if anything weird is happening with signals to the throttle body.

 

[58Willys]

You could try performing a throttle calibration. With engine off and ignition on, slowly, like 5 seconds) press accelerator to the floor and slowly release. Shut ignition off and let vehicle sit with doors closed for 20 min. Might help.

 

[BetterThanMine]

You could try performing a throttle calibration. With engine off and ignition on, slowly, like 5 seconds) press accelerator to the floor and slowly release. Shut ignition off and let vehicle sit with doors closed for 20 min. Might help.

Ill give this a go tonight, will it give me any messages indicating its doing its thing.

 

[58Willys]

Ill give this a go tonight, will it give me any messages indicating its doing its thing.

No, no confirmation.

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