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poor running with AMM, better without 200 1991

posted by  MrNabisco on  Thu Sep 29 21:46 CST 2016
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last visit: Wed Oct 22 12:36 CST 2014
[RELATED]

One connection to check is the big white wire plug on the passenger side of the console. Up near the firewall. I believe it is the connection to the ECU. I've had that plug be slightly loose and had intermittant issues.

And maybe double check the O2 sensor.

EBD codes?

Maybe you've got two bad AMM? Try the third one.

I'm assuming your 91 is LH2 since it will run with the AMM disconnected. LH3.1 will not.






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