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Misfire

Sal L

New member
Location
NYC
Car(s)
GTI
Anybody have this experience? Please let me know and your solution.

My 2018 GTI, 28K miles. She stalls during idle, stop and go traffic after she is driven for more than 1 hr. The check engine light and EPC goes on. Difficult to start the car unless I give it gas. Each time, this happened, code reader says, multiple misfire, Cylinder 1, 3 4 misfire.

GTI is all OK at highway speeds. My fuel average is 30mpg.

GTI has been at the VW shop 3X, they changed all the spark plugs, coils and 02 OXY Sensor before the Cat. Very frustrating. VW shop said they will get their master mechanic on this.

Thanks in advance to all.
 

nomunic

Drag Racing Champion
Location
East Coast
Car(s)
MK7
Injectors probably, maybe higher pressure fuel pump.
 

PerceivedShift

Autocross Champion
Location
Virginia
Ah, so called pros throwing parts at a car again.

The high pressure fuel pump is driven off the cam shaft in the head. So at idle your rail pressure might be dropping too far, but at higher RPM its happier. Odd that this part would fail after only 28k miles, is it stock?
 

swcrow

Autocross Champion
Location
Virginia
Car(s)
7.5 GTI
^agree with above......directly related to fuel pressure it seems
 

Sal L

New member
Location
NYC
Car(s)
GTI
Ah, so called pros throwing parts at a car again.

The high pressure fuel pump is driven off the cam shaft in the head. So at idle your rail pressure might be dropping too far, but at higher RPM its happier. Odd that this part would fail after only 28k miles, is it stock?
Thank you, all is Stock
 
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