volusherG

I recently replaced the plugs and the plug wires on a friends 05 Sable 3.0 V6 @ 68k miles.

Immediately at restart, the engine had a persistant miss. After checking I found out the plugs he supplied were for the Flex fuel engine and I replaced them with the correct plugs. The engine smoothed out and after a good road test the check engine light came on. Ran the codes and came up with PO300, Random Multiple Missfire. Figured this was due to the wrong heat range on the first plugs so I cleared the code, drove it back to him and signed off on it.
Two days later he calls and says the check engine light is on again. Run the codes again and this time I got PO171 (system too lean bank 1), PO17 (system too lean bank 2), PO300 (Random multiple missfire), P2196 (O2 sensor stuck rich bank 1 sensor 1 and bank 2 sensor 2). Not sure where to go with this. Was reading in another thread about the intake gaskets leaking and causing the first two codes. Any help direction or ideas would be appreciated.

tbird100636

Definetely check all PCV and vacuum line connections. Any splits or dry rot is a problem.

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Master ASE Certified L1 Chrysler Technician- still a Ford fan at heart.
1964 Thunderbird Hardtop- Chantily Beige- 390 FE 4V V8-Uncle's Car
1966 Thunderbird Convertible- Red- 390 FE 4V V8- Uncle's other car- waiting for paint and body work!!!
1967 Mustang Convertible- Blue- 289 V8- helping a friend re-assemble this classic