Removing the RPM and Speed limiters (4 cyl 2.2/2.4L & 2.2 Ecotec engines & I6 4.2)

I though a sticky on the subject was a good idea.

Note: in the pics below the stock values are shown for a calibration (12216489) that requires the tables in Step 3 & 4 to be changed.

Step 1: Change the RPM limits to whatever you want

http://www.hptuners.com/pub/chris/4cyl_limiter_1.jpg

Step 2: Change the Speed limits to whatever you want

http://www.hptuners.com/pub/chris/4cyl_limiter_4.jpg

Step 3: Raise the spark ramp out values so spark does not decrease at high RPM/Speed (not required for all calibrations)

http://www.hptuners.com/pub/chris/4cyl_limiter_2.jpg

Step 4: Raise the TCS High RPM/VSSvalues so that 1,2,3,4 cylinders do not fuel cut at high RPM/Speed (not required for all calibrations)

http://www.hptuners.com/pub/chris/4cyl_limiter_3.jpg

My VIN number is 1G1JC52F337125587. Does your software support the calibration in my car for me to be able to do this?
Second, I've read the forums regarding the GM Supercharger Kit #17800003 for 03 Ecotec equipped Cavaliers. If I were to remove the speed limiter on my car, would the speed limiter be restored after the dealer reflashes the PCM? If that is the case I wouldn't be able to download the saved file with the speed limiter defeat values in the tables you mention in your "sticky".
Finally I noticed the values you give in the "sticky" that are in green. Are those the default values for the listed calibration, or are they the new changed values you need to enter into each listed field?

if your vehicle is on the supported vehicles page http://www.hptuners.com/products/vcmsuite_vehicles.php its supported, if not then its not currently supported.

As for the #'s the ones in the screenshots are the stock figures in that particular cal file...just read the directions & he tells you what needs to be done to rid yourself of all of the speed limiters(in some cals there are some 10 different speed limiters like the one above)

the GM s/c reflash for the ecotec is not supported, if you remove your speed limiter and then get the s/c reflash done it will overwrite the speedlimiter again, then you will not be able to change it back again.

Chris...

just thought i'd let you know chris, you should change the thread title to I6s as well.. I had to go through the same process...

done, thanks for the heads up.

no worries just here to help...could you help me with my TCC get to know how ;P

In reference to the GM Supercharger Kit #17800003 and this HP Tuner kit. Will this program work with my Sunfire with the supercharger kit installed? Also can I use this program to install the software upgrade that comes with the supercharger?

what year/engine combo in the sunfire?

its a 2003 Pontiac Sunfire with the 2.2 Ecotec engine with the 5 Spd tranny. I'm going to put the supercharger on first, add a cold air intake, change the spark plugs to colder ones probly about 1 degree colder maybe 2. do a full coil over suspension and go from there. this is my project car until I get back to the states.

as per the supported vehicles page "Our product is designed to work for vehicles off of the show room floor with stock calibrations. If your vehicle is a hybrid or has a physically different PCM/VCM than it originally came with your vehicle might not be supported."

im still having issues with my speed limiter

step 1 . i left the rpm limits alone as im happy with the stock rev limiter for the time being

step 2. changed speed limiter (not speed limiter 2) to cutoff 255 and resume 250

step 3. put rpm drive/pn to 65535 and vss not rev to 255

step 4. am i to change the enable/disable vss to the different values as well ie change the 106mpg to the 255 and then disable to 250mph

thanks

* not sure if it matters but i totally zero'd my spark retard vs torque reduction to 0 for each cell as well

Quote:

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Originally Posted by LAFNGAS

im still having issues with my speed limiter

step 1 . i left the rpm limits alone as im happy with the stock rev limiter for the time being

step 2. changed speed limiter (not speed limiter 2) to cutoff 255 and resume 250

step 3. put rpm drive/pn to 65535 and vss not rev to 255

step 4. am i to change the enable/disable vss to the different values as well ie change the 106mpg to the 255 and then disable to 250mph

thanks

* not sure if it matters but i totally zero'd my spark retard vs torque reduction to 0 for each cell as well

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From looking at the scans you sent in the pcm is cutting neither spark nor fuel so its probably not a pcm speed limiter your hitting.

Make the changes as shown.

Russ Kemp

since the latest update, I cant disable the Top Speed limiter either!!!

I changed everything I had before (was one of the original that helped Chris locate the limiters), and I still hit one at 108ish.... seems like spark.

Quote:

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Originally Posted by Russ K

Make the changes as shown.

Russ Kemp

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Thanks Russ we both missed it :banghead:

Quote:

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Originally Posted by SpdRcrZ

since the latest update, I cant disable the Top Speed limiter either!!!

I changed everything I had before (was one of the original that helped Chris locate the limiters), and I still hit one at 108ish.... seems like spark.

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Post your tune & a scan of it hitting the limiter.

was looking for the scan, but I guess I didnt save it. We reflashed it again tonight (many times actually, lol) and its gone now. might have been a glitch with my file I saved. False alarm.

Quote:

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Originally Posted by SpdRcrZ

was looking for the scan, but I guess I didnt save it. We reflashed it again tonight (many times actually, lol) and its gone now. might have been a glitch with my file I saved. False alarm.

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geeze brian wtf:banghead:

good to hear you got it done

Naturally the day we get the supercharger in for our 98 cavalier our mechanic is gone to the show in houston so me (the fabricator) and another guy from the crew (appolsty/interior guy) slapped the supercharger on it before taking it out to the track and eliminiated the vss via the cutting of the red wire. Now on a 98 cavalier is there any techy that knows of a better SAFER way to get around this cause i know this will shut off my speedometer and im not so much for that. I would still like to have my speedometer working and i dont like the whole attaching a switch to it to flip back and forth is there any programmer or anything that is compatible with a 98 cavalier that will prevent us from topping out at 108? also im affraid that simply slashing the read wire we will still top out at 108...any help is appreciated due to the fact the car needs to be done soon and mechanic will be out for 2 months lol. thnx