Missfire Emerald ecu

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Discussion

Landracer33

Original Poster:

4 posts

46 months

Sunday 12th July 2020
quotequote all
I have an Emerald ecu running my LS2, the ecu was previously mapped at emerald when fitted to another LS2, however I have a lumpy tickover and when opening the throttle and entering load site 4 it badly missfires.
It’s firing on all 8 and checked continuity of the Wiring, the crank sensor is shielded.
I have run the data logger and cannot see anything obvious.
Any suggestions?

Edited by Landracer33 on Sunday 12th July 10:03

Landracer33

Original Poster:

4 posts

46 months

Sunday 12th July 2020
quotequote all
It’s new vehicle build so it hasn’t run before. However the ecu was previously fitted to a similar LS2 that ran fine.
I’ve had a ignition light on each lead and seems to have a consistent spark on all 8.
I’ve unplugged the injectors and coils individually and the engine note drops each time, indicating all are operating.
Ive even took the coil/injector feed out of the loom to rule out interference/noise.

Landracer33

Original Poster:

4 posts

46 months

Sunday 12th July 2020
quotequote all
Thanks for advice, but found the problem. The crank sensor was set as inductive not digital

Landracer33

Original Poster:

4 posts

46 months

Sunday 12th July 2020
quotequote all
Bizzarly it ran with a slight miss , it was only when it entered load site 4 that it wen’t really bad.