Misfires , smell of fuel help?

[kaosiow]

Hi people been a member for a while had the car for 3 year's but a couple of months ago the car started misfiring on two cylinders although can't remember which ones.

I replaced the coil pack, ht leads and sparkplugs, but to no avail. While the misfire was happening i took of the ht leads one at time and two where not sparking but the coil pack was brand new, i put the old one on but no difference.

Suddenly the issue stopped (this was November) now today it started again no power and the amber engine light is flashing while driving as well as stationary.

And it has been overfueling as you can smell the petrol.

Any help would be great as I've no idea what to try next.


Thanks for any help

 

[-Jamie-]

Lambda

 

[kaosiow]

Surely the lambda sensor would not stop the coilpack sparking?

 

[da rok]

Sounds like a bad connection in the loom, coils work in pairs so they will stop working 2 at a time, trace back the loom and look for any damage, and check all the connections... lambda can make the engine run lumpy but the computer will generally swap to using the map sensor if the fuel trims are going above +- 20%, it cant cause the coil packs not to fire at all...

 

[kaosiow]

So I replaced the wire from the ecu to the coilpack, it's been fine all weekend however on the way to work this morning it was doing the same again , so it wasn't the wiring? Do the ecu's have any known faults that can cause this?

 

[da rok]

Did you check the wires going to the injectors and the earths ?