Car Jerks Hard Before it Hits Boost/Power

[Hayes5point0]

Hello,

I have a 2013 Ford Mustang GT with a Vortech V3 Supercharger amongst other supporting engine mods. Recently when making a pull in the car it jerks once super hard around 3-4k rpms before it gets into boost/power but then its smooth/normal all the way through the power band. It is super frustrating to drive with but is still making the power like it should. I have a SCT Tuner with customs tunes from Lund and tried reflashing the tune but no change was made. Does anyone have any idea what could be causing this problem? Is it a tuning issue or more along the lines of an ignition problem?

Thank you for any help!

-Hayes

 

[Midlife Crises]

Is there a bypass valve transferring at that time?

 

[Hayes5point0]

The car has a wastegate if that's what you're asking, but I would assume it would be closed during that time since it's building boost.

 

[stkjock]

if the car it self is moving right, that would make me think suspension, not tuning.

other thought is motor mounts - maybe one is bad

 

[Hayes5point0]

my apologies i can see how my wording made it seem like the car was jerking to the right. it's more along the lines of falling on its face for a split second and loses all engine power then all comes back in. like the ignition or something is cutting out

 

[lwarrior1016]

Did the car ever run correctly? Is this a new development or has it done this since the blower was initially installed?

 

[Hayes5point0]

no this is new. it just started happening a couple of weeks ago. before it never had any issues like this so that’s why i’m questioning if it’s the tune or not

 

[lwarrior1016]

I don’t think that’s going to be a tune issue then.

I’d probably start looking for misfires. Coils, plugs, injectors, and so on

 

[stkjock]

check the belt, tension, and tensioner

 

[JC SSP]

If you have a boost gauge you can monitor belt slippage. +/- boost

Post some pics of your ride too.