Quadrajet Problem Solving > Diagnose a Quadrajet carburetor problem
Low dwell problem (ECM, PROM M/C solenoid) what to do next?
jjr:
None of my materials expand on "low reference", it is my belief that it's an attempt to
ensure a good ground. Here is a snippet from a 1981 Pontiac service manual about the
sensor.
And I also believe that the 1981 Corvette calls for the exact same O2 sensor as the Pontiacs.
Joe
jjr:
In a non-gm chart of the system, it is shown as simply a ground...
Joe
jjr:
Well the "calibrated" signal when warm and in open loop is 10 times a second.
I think you may have a bad wire somewhere now...
Also, I just finished a dwell adjustment thread for the 1981 Qjet.
Assuming the bench settings got you in the ball park, here would be how to trim
the carb...
Joe
Peer81:
Thanks for all the info Joe!
I'll read it tomorrow to fine tune the carb.
BTW. I found the problem and solved it!
I changed the wide band back to the heated narrowband and everything is working perfectly!
Thanks everybody for thinking with me
Greetings Peter
jjr:
Ok, here's how the general educated it's line people, maybe this
will help also...
Joe
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