Quote:
Originally Posted by Old Mechanic
It's fairly easy to check for DFCO, decelerate using engine drag in gear and when DFCO shuts off you will feel the difference. My 92 had it but the idle speed was so high it would go 25 MPH in 5th gear with your foot off the gas.
regards
Mech
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On a lot of cars you can also detect when DFCO engages by tuning your AM radio to a vacant frequency and turn the volume up so you can hear the ignition static noise on the radio. When DFCO kicks in, that noise goes away.