2011 5.0 with Paxton Supercharger just installed...surging idle issue

[ArabianOak]

I recently had the paxton supercharger kit purchased in the link below installed on my son's 2011 Ford Mustang GT.

Paxton Supercharger Complete Kit 2200SL Satin Finish (2011-2014 Mustang GT) 1001863SL (beefcakeracing.com)

We had the kit installed by Deans Performance in Saint Charles, IL. Upon completion of install the car now has a surging idle...from around 600-900rpm. It dyno'd great and made 613RWHP...runs really nicely other than at idle.

I have attached the dyno sheet and video of the surging idle...

Here is a link to the video of the surging idle...

Installer has already done the following trying to fix...

“I took it back apart and I checked the blow off valve and I changed the spring in the blow off valve to see if that was causing the surge and that didn't do anything and then I also reclocked the mass air meter in a few different spots and none of that mattered so I think it's related to the tune or something to do with the throttle body calibration in the tune I'm not 100% sure but it doesn't look like there's anything wrong with the intake piping”

He also checked for vacuum leaks.

“ checked it over last night and didnt see any leaks so then i smoke checked it for leaks and didnt find anything.”

Vortech is saying they can't help and the tune the kit came with is all they give...anyone have any thoughts on this? I'm thinking something in the tune (possibly TB tune area). Any help would be appreciated.

 

[PC03GT]

I recently had the paxton supercharger kit purchased in the link below installed on my son's 2011 Ford Mustang GT.

Paxton Supercharger Complete Kit 2200SL Satin Finish (2011-2014 Mustang GT) 1001863SL (beefcakeracing.com)

We had the kit installed by Deans Performance in Saint Charles, IL. Upon completion of install the car now has a surging idle...from around 600-900rpm. It dyno'd great and made 613RWHP...runs really nicely other than at idle.

I have attached the dyno sheet and video of the surging idle...

Here is a link to the video of the surging idle...

Installer has already done the following trying to fix...

“I took it back apart and I checked the blow off valve and I changed the spring in the blow off valve to see if that was causing the surge and that didn't do anything and then I also reclocked the mass air meter in a few different spots and none of that mattered so I think it's related to the tune or something to do with the throttle body calibration in the tune I'm not 100% sure but it doesn't look like there's anything wrong with the intake piping”

He also checked for vacuum leaks.

“ checked it over last night and didnt see any leaks so then i smoke checked it for leaks and didnt find anything.”

Vortech is saying they can't help and the tune the kit came with is all they give...anyone have any thoughts on this? I'm thinking something in the tune (possibly TB tune area). Any help would be appreciated.

View attachment 1852270

That dyno graph isn't right, it should be way smoother. I'd say it's tune related

 

[decipha]

if the throttle body is stock then its not the throttle body

you sure you don't have any other mods done to the vehicle that the tune doesn't account for? long tubes or anything of that sort? did they route the pcv correctly?

 

[FourSixPony]

Definitely sounds like the tune is off.

 

[SVTXTC]

Independent compression check needed. This car had a one piston repair correct?

 

[ArabianOak]

Independent compression check needed. This car had a one piston repair correct?

yes, compression check done and everything is perfect...that was done before putting the blower on.

 

[ArabianOak]

if the throttle body is stock then its not the throttle body

you sure you don't have any other mods done to the vehicle that the tune doesn't account for? long tubes or anything of that sort? did they route the pcv correctly?

cat back exhaust only...

 

[ArabianOak]

Def gonna have the car custom tuned in the very near future...after doing some online research, this vortech kit is known to have this issue with the canned tune it sends...not a big deal but you would think that vortech would do one tune update. He's been driving it the last week or so and loves it even with the surging idle...lol.

 

[PC03GT]

This is what will be if you go gen3, intake cams, and gen3 intake. Little vortech with a 3.6 pulley