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92 AMM not adjustable
Posted by JohnK (more from JohnK) on Tue, 5 Jun 2001 11:13:31
In Reply to: How to check..., Emil, Tue, 5 Jun 2001 04:57:50
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To test for total failure:
Remove the hose between air filter and AMM.
Have a helper rev engine to 3000 RPM for a few seconds and turn off engine.
Look immediately into AMM for a glowing hot wire burn-off cycle. If no glow, get new AMM.
You can test for mixture with digital voltmeter at back of O2 sensor plug near HVAC air intake(connected and engine running). Voltage should fluctuate around 0.5 volts spending half the time above and half the time below. If imbalanced, v>0.5 = rich, v<0.5 lean.
Otherwise, just swap in a known good one (part code ends in 013 not 005) to see if your symptoms disappear. Phases of failure...Cold start idle fluctuation at first, then surging and flat spots under acceleration, finally bad popping and sputtering not unlike what happens when you blow a hose between AMM and intake. Sobstory has rebuilt ones for around $150, new ones for $200+.
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