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ECMlink N/T DSMlink Log Help

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Dhan

Supporting Member
3,772
192
Apr 29, 2010
Denver, Colorado
Some quick background. I'm trying to troubleshoot my '91 Laser with a n/t 4G63 motor. I did a new head and lifters, plugs/wires, new fuel, and timing belts.
The car's got good compression, timing's right, fuel and spark is there. I start it, but it dies unless I give it throttle. So it won't idle at all. Seems to be running a bit rich too.

I've gotten DSMlink to connect with my n/t non-eprom ECU, using the factory system MUT-II. I have one log that I was trying to compare to others, but all other logs are from turbo models.
The O2 sensor looks off in my log, but I don't know how much it differs between the n/t and turbo. I'm in the process of searching the shop manual to see how to check if the O2 sensor is bad.

Does anyone else see anything of interest?
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The narrow band o2 is used for closed loop mode to allow the ecu to maintain an AFR of 14.7:1. The sensor should be cycling which yours isn't. That's also assuming that your connection with link was working properly.
 
I checked my o2 sensor connector using the method described in the manual and got the correct ohms (12) and the CEL never flashes any codes, so I figured the sensor works.
But if the sensor isn't cycling, is that an issue with the sensor itself or maybe the wiring?

And I know link wasn't designed for a n/t application, but I talked to Thomas and he helped guide me to where I'm at, so I'm fairly confident link is setup correctly.
 
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