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Old 11-02-2007, 10:13 PM
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spinedoc spinedoc is offline
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Join Date: Nov 1999
Location: North Grafton, MA USA
Posts: 700
Exclamation PO300 cylinders 5,6,7,8 misfiring, all low compressions, any ideas?

1996 SL500 with 112k, starting bogging down badly and then stalled out. I had it towed. It came up with PO300, PO305, PO306, PO307, PO308, no more codes. It has a clacking that seems to be coming from the bottom end.

It barely starts, then stalls out pretty quickly. My indie checked the compression and the entire bank is in the 60's. He is telling me it is a bad connecting rod and I need to replace the entire engine.

Where do I start with this!??!?
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