Replaced Knock Sensor but CEL is still on and car is still "choking"

D

Dariusbrickman

Member

:

2003 Mazda Protege

• Apr 16, 2017

• #1

I went to an auto parts store because the problem started as I was going home, I was driving then my car started "jiggling" and was randomly cutting off in the middle of traffic, every time I would turn it on it would drive slow and sluggish as well. Anyways, I drove it to the auto store and they told me it was the knock sensor and I then got it relpaced. It was driving fine after that, then all of a sudden the CEL started blinking and my car started chocking again.

Sent from my SM-J320P using Tapatalk

 

D

Dpwhitehead1

Damian

Contributor

:

MSP 1145

• Apr 16, 2017

• #2

Probably the iac or something.


What code did they read

 

D

Dariusbrickman

Member

:

2003 Mazda Protege

• Apr 16, 2017

• #3

boostdprotegelx said:

Probably the iac or something.


What code did they read

Click to expand...

P0304 I think



Sent from my SM-J320P using Tapatalk

 

D

Dpwhitehead1

Damian

Contributor

:

MSP 1145

• Apr 16, 2017

• #4

Dariusbrickman said:

P0304 I think



Sent from my SM-J320P using Tapatalk

Click to expand...

Ok well that code in itself is a cylinder 4 misfire.

 

D

Dariusbrickman

Member

:

2003 Mazda Protege

• Apr 16, 2017

• #5

What do I do?

Sent from my SM-J320P using Tapatalk

 

N

naguilar

:

2003 Sunlight Silver Mazda Proteg5

• Apr 16, 2017

• #6

Replaced Knock Sensor but CEL is still on and car is still "choking"

Had that same issue a year ago, except the P5 was misfiring on cylinder 2. Have you changed your plugs recently?

A fresh set of spark plugs and coils solved the issue for me.


Sent from my iPhone using Tapatalk

 

D

Dariusbrickman

Member

:

2003 Mazda Protege

• Apr 16, 2017

• #7

naguilar said:

Had that same issue a year ago, except the P5 was misfiring on cylinder 2. Have you changed your plugs recently?

A fresh set of spark plugs and coils solved the issue for me.


Sent from my iPhone using Tapatalk

Click to expand...

I just got some new spark plugs but when I took the old ones out I found out that there's oil leaking in the spark plug wells. I don't really know how to remove the oil from the wells but I bought a new valve cover gasket as well.

Sent from my SM-J320P using Tapatalk

 

H

hornsfan10609

Certified Mazda Tech

:

2003.5 Mazdaspeed Protege x2

• Apr 16, 2017

• #8

New valve cover gasket torqued properly will keep oil from going into the spark plug hole. You need new coil packs and wires to fix the misfire, in addition to plugs unless you recently replaced them.

 

D

Dariusbrickman

Member

:

2003 Mazda Protege

• Apr 16, 2017

• #9

hornsfan10609 said:

New valve cover gasket torqued properly will keep oil from going into the spark plug hole. You need new coil packs and wires to fix the misfire, in addition to plugs unless you recently replaced them.

Click to expand...

I got a new vc gasket and plugs. My car is working fine now but my cel is still blinking


Sent from my SM-J320P using Tapatalk

 

H

hornsfan10609

Certified Mazda Tech

:

2003.5 Mazdaspeed Protege x2

• Apr 16, 2017

• #10

If it's flashing it is misfiring. You need to install new ignition coils

 

D

Dariusbrickman

Member

:

2003 Mazda Protege

• Apr 16, 2017

• #11

hornsfan10609 said:

If it's flashing it is misfiring. You need to install new ignition coils

Click to expand...

How much are those?

Sent from my SM-J320P using Tapatalk

 

rsvinylgraphics

2008.5 MGM MS3

Contributor

:

2008.5 MS3

• Apr 16, 2017

• #12

Dariusbrickman said:

How much are those?

Click to expand...

https://www.youtube.com/watch?v=ju4b_xQi9CY

I'd go with the Hitachi $48.99

http://www.rockauto.com/en/catalog/mazda,2003,protege5,2.0l+l4,1416833,ignition,ignition+coil,7060

 

Last edited: Apr 16, 2017