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i got a 1992 mazda mx3 with the KLZE swap (curve neck) KL36 ecu cars running really rich i scanned the car and the code i got where no change in left and right O2 sensor Knock sensor and a EGR code. the o2 sensor i bought was an aftermarket one so i had to splice the wires and wire it in the wire is right i got the schematics for the wiring. ill pay to fix the problem if i have to i i got the 1.8 exhaust manifold on the klze looking to by headers if any body got any need help plz and thanks.

Does the KL36 ECU set an EGR code??? Weird. No EGR in Japan - at least for the KLZE.

Have the same combination - didn't have the problem but bought two new O2 sensors. Is the knock sensor even connected? Lazy installers may not know to reverse the routing to (our) passenger side and connect there.

^ im in that group what you mean , were do i relocate?

MAZDA SPEED MX-3 wrote:^ im in that group what you mean , were do i relocate?

Simply reinstall the wire under your intake so it reaches.

O2 sensors are really important so if you cheaped out on them good luck.

the KL36 ECU should not be capable of throwing an EGR code. It's possible that you just counted wrong.