Loss of acceleration in 2nd gear suddenly.

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11-20-2018, 07:53 PM

Ironhide

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Thread Starter

Join Date: Oct 2018

Location: Vancouver

Posts: 38

Loss of acceleration in 2nd gear suddenly.

hey everyone, own a supercharged 2003 mustang Gt and after I accelerated from first to second the car just lost power while trying to accelerate. It didn’t turn off, but it wouldn’t accelerate as fast as I wanted it to. What’s going on? Engine light is on because I need to clean maf. Which I’m doing this weekend. It’s a stored vehicle. Any help would be really appreciated. It only happened during a hard acceleration.

Last edited by Ironhide; 11-20-2018 at 08:02 PM.

11-20-2018, 08:28 PM

Macgyver 4404

CMOC Newbie

Join Date: Oct 2018

Location: Nobel, Ontario

Posts: 23

Sounds like you might have blown off a hose somewhere, check all your SC connections. Check all your check engine codes. Good luck.

11-21-2018, 10:50 AM

Ironhide

CMOC Rookie

Thread Starter

Join Date: Oct 2018

Location: Vancouver

Posts: 38

Felt like a lag or sudden loss of power after shifting

11-22-2018, 02:50 PM

Mudlite

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Join Date: Feb 2017

Location: Exeter Ontario

Posts: 35

That sounds like fuel supply being starved, check fuel filter/fuel pressure.

11-22-2018, 03:22 PM

Ironhide

CMOC Rookie

Thread Starter

Join Date: Oct 2018

Location: Vancouver

Posts: 38

Ok thanks. I would if a faulty maf or iac would be causing this

11-22-2018, 03:39 PM

Macgyver 4404

CMOC Newbie

Join Date: Oct 2018

Location: Nobel, Ontario

Posts: 23

It's all connected, could be any or all mentioned.

11-22-2018, 04:14 PM

Mudlite

CMOC Rookie

Join Date: Feb 2017

Location: Exeter Ontario

Posts: 35

Did your car rev out OK in first gear ? Dieing in second sounds like fuel starvation. If it reved out OK in First then Maf and AIV are probably not the problem..in my opinion. Good luck figuring it out, let us know !