Scirocco Central

Hy guys

Engine 1.4 TSI 160 hp, with 46.500 Km's.

What else can I check to end misfires...
The engine has no compression problems (it has been tested several times), NGK IX spark plugs (BR8EIX) have been placed, best ignition coils on the market have been installed (IP - Ignition Projects).
The problem is that misfires continue to appear, example: if the car stays on the garage one day without working, the next day it gives misfire. If it runs every day, nothing happens.
Someone told me it should be injectors or the low pressure gas pump...

What do you think?

Thanks in advance

My 1.4 tsi also misfires on cold starts, especially after not being started for a few days (admittedly the exhaust note does sound quite good when it happens ) . However this always lasts a few seconds and then it smooths out. Not sure if this is what you're experiencing but it seems to be quite common with these engines..

leedarmanin wrote:My 1.4 tsi also misfires on cold starts, especially after not being started for a few days (admittedly the exhaust note does sound quite good when it happens ) . However this always lasts a few seconds and then it smooths out. Not sure if this is what you're experiencing but it seems to be quite common with these engines..

Hi,

It's not the misfires on cold starts, I always leave it working for a minute and then I drive.
And yes, the exhaust sound on cold start is awesome
This kind of misfire always happens after 5 minutes of driving without reaching the normal operating temperature (90.º), after making a turn, or on a street with some inclination.
Resume: it happens only once after 4 to 6 minutes driving, flashes the EPC light, shakes a little under acceleration and then returns to normal operation.
Sometimes cylinder 1, sometimes cylinder 2, sometimes cylinder 3, and sometimes cylinder 4. No other diagnostic error appears, only misfire!
A friend told me it could be the low pressure fuel pump, or the knock sensor.