'99 Ford Contour has always started smoothly. Last week I had a pair of oxygen sensors replaced (downstream bank 1 sensor 1 reading "system too lean") because the check engine light was on, but there was no problem with the engine starting or running. They also cleaned the fuel injectors and intake.
But following that service, my car now cranks a lot longer before turning over, especially upon cold start. On warm start takes slightly longer to turn over than it used too, and there is some knocking. How could this relate to the oxygen sensor repairs? What can I expect the repair shop to do to diagnose this problem? Thanks!
2006-07-22
17:43:15
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2 answers
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asked by
Steve Polychronopolous
5