4g61t.org

Putting my 89 Colt GT (original turbo car) back together and running the original harness with original 4g61t ECU with DSMLink v2. I've noticed that my front O2 is not cycling at idle and have used 2 known good O2 sensors with no luck. Started doing some electrical troubleshooting today and got some weird results for pins 2 and 4 of the O2 sensor connector that should be grounding points. I know the chances of getting a volunteer to check this is probably slim to none, but I'll throw the request out there. If anyone could unplug their ECU and O2 sensor and check continuity between the 4 O2 sensor pins and the 3 ECU connectors and let me know their results, I would greatly appreciate it. I'll even send you some money for a six pack for your troubles

Check engine code maybe ?

No CELs on the dash or in DSMLink and no DTCs in DSMLink either. It's definitely something haywire in the wiring, or so it seems. I'm going to spend some more time on it tonight when I get home from work. I was just hoping I could get some results to compare against on a known working car. The wiring diagram is clear so I should be able to solve the issue.

Is your motor grounded enough?

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Had a:
1991 Eagle Summit ES Hatchback - 4g15 12v 5spd
1991 Dodge Colt -4g15 12v 4spd
Have a:
1978 Oldsmobile Cutlass - 468BBO TH350
Round 3:
1990 Dodge Colt-4G63T 5spd