5 replies to this topic

[Stevenjasmin]

I am having issues with a lumpy idle. I have tracked it to the coil cylinder 1 2 have strong consistent spark. Cylinder 3,4 are the ones missing. I found this out by hooking a timing light up to the wires and watching the spark pattern. I replaced the coil already with a new ngk coil, and ohm tested it seems to check out. I also replaced the crank sensor thinking maybe it was less than ideal. The leads and plugs are also new and gapped to .8mm Cleaned the connectors on all sensors and ECU. Anyone have any ideas what it could be? Oh also replaced the main relay that sits a puce the servo.


Thank you

Edited by Stevenjasmin, 16 August 2016 - 10:53 AM.

[FlyingScot]

Are you saying there is still no spark on cylinders 3 & 4 despite changing the coil pack and cleaning the connectors to the coil pack?

FS

Edited by FlyingScot, 16 August 2016 - 11:17 AM.

[Stevenjasmin]

No there is spark but it's irratic , cleaned all conectors chased the wires can't find a short. Is there something else I could look at?

[AlexMozza]

We had something similar to this. Ended up getting the ecu tested and it turned out to be a damaged circuit in the ecu.

[STREETHAWK84]

Was the issue repairable / did the ecu repair fix issue or did you need a new ecu

[viz139]

Just checking something here. The MPi coilpack is marked 1234 and these connect to cylinders 1234  ( not 1342). So cylinders 1 and 4 fire as a pair and 2 and 3 fire as a pair. An ECU fault should only effect one pair 1 4 or 2 3.  Check your leads.