Hellcat Fellas! U1424 and P1DD2, what do we know

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03-14-2017
CravenPerf

1 Attachment(s)

Hellcat Fellas! U1424 and P1DD2, what do we know

What do we know about larger throttle body flow and torque calculations at or near idle? Working with a monster throttle body on a big blower Hellcat, only issue left with the car is if left idling it throws these two codes. I understand it is flowing more air than it is looking for, but I haven't been successful in harnessing that in yet. Anybody else out there dealt with this yet? When logging idle you can see how far off actual torque vs desired is. Log attached, any thoughts or input appreciated!
03-14-2017
Jay@HAP

Whipple 4.5 and their big oval T/B?
03-14-2017
CravenPerf

Yes sir. Messed with one?
03-14-2017
CravenPerf

Looking like HP doesn't have the table to make this work. Grrr
03-14-2017
DRTurbo

Post up your tune file - I dont have a cat file infront of me - I thought there was a value for this - its assembled from 2 different idle tables.
03-14-2017
Jay@HAP

Quote:

Originally Posted by DRTurbo

Post up your tune file - I dont have a cat file infront of me - I thought there was a value for this - its assembled from 2 different idle tables.

Are you talking about the small and large TB airflow tables?
03-14-2017
Jay@HAP

Quote:

Originally Posted by CravenPerf

Yes sir. Messed with one?

Make sure you don't have any vacuum leaks. I had some "issues" with ours. Also you need to log total air flow. That's the T/B airflow.
03-14-2017
CravenPerf

No leaks, I'll let you know if our current solution doesn't fix it, found a fix in another software, now we will see if we can make the HP side work. If it works I'll post it up.
03-14-2017
Jay@HAP

Quote:

Originally Posted by CravenPerf

No leaks, I'll let you know if our current solution doesn't fix it, found a fix in another software, now we will see if we can make the HP side work. If it works I'll post it up.

Sounds good. If you know what tables you need see if HPT will add them.
03-15-2017
Mark@HPTuners

Make sure you using the latest VCM Suite 3.4 or VCM Suite 3.5 beta. We are constantly improving the software, fixing bugs, adding parameters, etc. Especially in VCM Suite 3.5 beta, new stuff gets added almost daily. Your issue may have been solved in a newer version of the software. If you need the beta, just email support. Make sure to include your MPVI Serial Number.

After you download latest, be sure to check over your tune again and make sure that everything is set the way you need it to. I know we corrected a bug or 2 that were affecting 15+ Hellcats/SRTs recently in beta.
03-15-2017
curt@injected

Just finished one up. Was having a lot of issues with map sensor rationality checks, torque calculation and getting the etc light @ idle in neutral with p2110. I had to go through and find all of the map checks, the pwm threshold @ idle and the engine torque calculation table and have them all added so that i could get it right. Car drives perfect now. No limp mode driveability is perfect.
03-15-2017
curt@injected

Ask Mark to add the stuff i requested and you should be able to dial it in.

Btw hpt still hasn't added the parametet to open the throttle fully for whatever reason. I did find it though
03-17-2017
DRTurbo

1 Attachment(s)

I keep catching limp mode in new ways on this 2016 hellcat - it seems that everything is logically set to just not car how much airflow it sees- currently P0069
03-20-2017
curt@injected

Quote:

Originally Posted by DRTurbo

I keep catching limp mode in new ways on this 2016 hellcat - it seems that everything is logically set to just not car how much airflow it sees- currently P0069

There are offsets for map baro correlation which can be opened up to remedy that. Have them added
07-19-2019
edgar

do you have a email address so i can send you my hellcat calibration having trouble with U1424 P012B whipple 4.5 id 1300cc
07-22-2019
Trbobuick

Quote:

Originally Posted by edgar

do you have a email address so i can send you my hellcat calibration having trouble with U1424 P012B whipple 4.5 id 1300cc

Try entering these parameters :
https://photos.app.goo.gl/khrT6JCkbiJDHUxz9
If fixed my U1424 code. I don't know how it worked, but it did.
04-28-2020
toxicperformance

Hi friends any one knows how calibrate the 105mm throttle body or have a link to read in wich adress we need to go to calibrate this one ?

Thanks
04-28-2020
Hpindy

Quote:

Originally Posted by toxicperformance

Hi friends any one knows how calibrate the 105mm throttle body or have a link to read in wich adress we need to go to calibrate this one ?

Thanks

I'm in the same boat also.
04-28-2020
toxicperformance

Guess is not to much difference but have to be sure befor install
04-28-2020
tbrtuning

Scale throttle body airflow up. I never really have problems with the big throttle bodies but always make the same sets of changes so not sure another change doesn't prevent issues. I believe if you go up maybe 30% on throttle bidy airflow you'll be fine.

Some aftermarket throttle bodies don't seem to close in a way that restricts airflow very well and need quite a bit of air added to table at low near closed voltages to prevent a hanging idle and code.
05-01-2020
toxicperformance

Quote:

Originally Posted by tbrtuning

Scale throttle body airflow up. I never really have problems with the big throttle bodies but always make the same sets of changes so not sure another change doesn't prevent issues. I believe if you go up maybe 30% on throttle bidy airflow you'll be fine.

Some aftermarket throttle bodies don't seem to close in a way that restricts airflow very well and need quite a bit of air added to table at low near closed voltages to prevent a hanging idle and code.

Thats Great to know
Thanks
05-03-2020
Trbobuick

I used these values and it fixed my u1424 code. I also disabled it in the trans tune just to be safe .

https://photos.app.goo.gl/wQ3ryAi7eFQ9NAz76
12-23-2020
GrannySShifting

Regular 2015 Challenger with Magnuson otherwise all stock, sets U1424 immediately and NEVER have any throttle now, any one have any ideas Ive been beyond stumped on this one
01-19-2021
drumnbasslvr

GrannySSshifting, simply put back the values to stock in transmission tune under torque management>general>max torque limit. They don't like to be altered. Your U1424 should go away then.
01-22-2021
GrannySShifting

Quote:

Originally Posted by drumnbasslvr

GrannySSshifting, simply put back the values to stock in transmission tune under torque management>general>max torque limit. They don't like to be altered. Your U1424 should go away then.

I have flashed it with STOCK program?
09-02-2021
GrannySShifting

Quote:

Originally Posted by curt@injected

Just finished one up. Was having a lot of issues with map sensor rationality checks, torque calculation and getting the etc light @ idle in neutral with p2110. I had to go through and find all of the map checks, the pwm threshold @ idle and the engine torque calculation table and have them all added so that i could get it right. Car drives perfect now. No limp mode driveability is perfect.

What are the ECM table numbers of the stuff you are talking about so we can tell if its in latest beta for whatever OS we have?
12-18-2022
6.2_JGC

Quote:

Originally Posted by CravenPerf

What do we know about larger throttle body flow and torque calculations at or near idle? Working with a monster throttle body on a big blower Hellcat, only issue left with the car is if left idling it throws these two codes. I understand it is flowing more air than it is looking for, but I haven't been successful in harnessing that in yet. Anybody else out there dealt with this yet? When logging idle you can see how far off actual torque vs desired is. Log attached, any thoughts or input appreciated!

Did you ever figure out the issue, im currently having the same 2 codes pops up

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