The engine sputters when floored?

PAULSENJAKE

MEMBER
2003 MITSUBISHI GALANT
2.4L
4 CYL
2WD
AUTOMATIC
140,000 MILES

My car sputters when I floor it and stalls randomly but if I do it slowly it's fine also the coolant just disappears and I can't find a leak anywhere and it drains fast.

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Wednesday, September 4th, 2024 AT 2:22 PM

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
45,617 POSTS

This might be two separate problems, but if the head gasket is blown it can fool the oxygen sensors, a weak MAF sensor or fuel pump can cause this problem. First let's unplug the MAF sensor to see if there are any changes, here is the location. Check out the images (below). Please let us know what happens.

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Thursday, September 5th, 2024 AT 8:20 AM

PAULSENJAKE

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13 POSTS

It was worse when I unplugged it.

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Saturday, September 7th, 2024 AT 1:13 PM

KEN L

MASTER CERTIFIED MECHANIC
45,617 POSTS

Okay, let's check for the blown head gasket next, if coolant is being burnt it can fool the oxygen sensors and cause problems, this guide can help

https://www.2carpros.com/articles/head-gasket-blown-test

this guide can help as well

https://www.2carpros.com/articles/car-is-leaking-coolant

Please go over this guide and get back to us.

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Sunday, September 8th, 2024 AT 11:03 AM

PAULSENJAKE

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13 POSTS

I will be checking that tomorrow but I was out in the garage letting it run and it does leak coolent

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Sunday, September 8th, 2024 AT 6:29 PM

KEN L

MASTER CERTIFIED MECHANIC
45,617 POSTS

I could have overheated enough to blow the head gasket which is common. You might need to raise the car up so you can see under it to get an idea of where it is leaking from. When the engine is cold it should run normal?