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CYLINDER 3 MISFIRE NEED HELP ASAP


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Berk1999
New User

Jun 19, 2018, 9:05 PM

Post #1 of 3 (322 views)
post icon CYLINDER 3 MISFIRE NEED HELP ASAP Sign In

I was on the way to my cousins house when my check engine started to flash i finally arrived and checked the codes and there were two one of them was p0303 which is cylindee 3 misfire and the other code is for a mass airflow sensor and the purge valve needed to be replaced. would replacing the mass air flow sensor and purge valve fix the misfire on cylinder 3 . The codes were the following p0303 p0135 p0441 p0174 p0171

I have a volkswagen passat 2003 glx 4 motion sedan


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 20, 2018, 4:23 AM

Post #2 of 3 (277 views)
Re: CYLINDER 3 MISFIRE NEED HELP ASAP Sign In

No. those codes did not say to replace those or any parts. The codes merely tell you there is an issue with the system that needs to be further diagnosed.

This can be a simple as a tear in the intake snorkel or a hose left disconnected.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Sidom
Veteran / Moderator
Sidom profile image

Jun 20, 2018, 4:02 PM

Post #3 of 3 (262 views)
Re: CYLINDER 3 MISFIRE NEED HELP ASAP Sign In

If you haven't changed the spark plugs in a while...That would be a good place to start...

Change the plugs (with OE ones) and move the number 3 coil to a different cyl.....

Make a note of all the codes, then clear them and drive the car and see what comes back....If it's still running bad and a code comes up on the cyl you put the #3 coil on....then the coil is bad.....If a P0303 comes back then you have the same problem on #3 and would need to test further....






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