missfire, eml light and codes read

[mr shifter]

Hi, my 1.8t has a missfire, uneven tickover, not drastic but noticeable though. Just put new platinum plugs in and 2 new leads. seems slightly better and the car drives fine. The codes read are saying multiple missfire. New coils perhaps? Any ideas would be appreciated.
Thanks.

[chrissyboy]

Originally Posted by mr shifter

Hi, my 1.8t has a missfire, uneven tickover, not drastic but noticeable though. Just put new platinum plugs in and 2 new leads. seems slightly better and the car drives fine. The codes read are saying multiple missfire. New coils perhaps? Any ideas would be appreciated.
Thanks.

i would have to agree that it may well be the coil packs ,,, is the car jerking when you give it a heavier right foot

[mr shifter]

Originally Posted by chrissyboy

i would have to agree that it may well be the coil packs ,,, is the car jerking when you give it a heavier right foot

doesnt appear so. deffo doing that when pulling away though.

[marinabrian]

Originally Posted by mr shifter

Hi, my 1.8t has a missfire, uneven tickover, not drastic but noticeable though. Just put new platinum plugs in and 2 new leads. seems slightly better and the car drives fine. The codes read are saying multiple missfire. New coils perhaps? Any ideas would be appreciated.
Thanks.

I rather think a fuelling issue, perhaps related to a duff upstream HO2 sensor?, I had an issue on my 25 very similar about a month ago, but a T4 session will stop you grasping at expensive straws.
I recently had an appalling misfire on my Tourer, which was related to faulty wiring to the MAP sensor, but if I hadn't had the luxury of T4 access, I would have never found the fault.
I wouldn't place too much emphasis on generic OBD P codes, but it wouldn't harm to see if your Lambda outputs look ok
HTH
Brian.

[mr shifter]

Originally Posted by marinabrian

I rather think a fuelling issue, perhaps related to a duff upstream HO2 sensor?, I had an issue on my 25 very similar about a month ago, but a T4 session will stop you grasping at expensive straws.
I recently had an appalling misfire on my Tourer, which was related to faulty wiring to the MAP sensor, but if I hadn't had the luxury of T4 access, I would have never found the fault.
I wouldn't place too much emphasis on generic OBD P codes, but it wouldn't harm to see if your Lambda outputs look ok
HTH
Brian.

ok shall get it looked at when i find a garage with the t4 reader.

[chrissyboy]

Originally Posted by mr shifter

doesnt appear so. deffo doing that when pulling away though.

if only when frst pulling away maybe an injector or a dirty fuel filter

[mr shifter]

Fault code no 4 cylinder misfire. Shall have to do a compression test now.

[chrissyboy]

Originally Posted by mr shifter

Fault code no 4 cylinder misfire. Shall have to do a compression test now.

right now you know which cylinder is misfiring swop the coil packs over to see if the misfire stays on cylinder 4 if it moves to another cylinder then you know it is the coil pack ..

[mr shifter]

Done that, still on bank no4.

[chrissyboy]

Originally Posted by mr shifter

Done that, still on bank no4.

could be engine coolant tempaerture senosor,crankshaft postion sensor,air intake system/vacuum system - leaks,fuel lines - leaks blockage,injector,ngine management system wiring connection , or the ecm its self ... if not any of them its possible its the gasket has lifted between cylinders .. have you checked the plug in cylinder 4 is ok and the gap is set right 1.0 and it is not loose