

| Subject: | Back-fire |
| From: | John Schaper |
| Date: | Tue, 8 May 2001 07:38:30 -0700 |
In my 85 GL on Sunday, I was driving down from Sonora Pass when I experience the engine backfiring going downhill, rpm's at 4,000, coasting. I have a small leak in my exhause, upstream from the O2 sensor. Is this a timing thing?
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