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Discussion Starter · #1 ·
My engine seems to be running fine, but the check engine light is on. I used my code reader and I get P0300(random multiple cylinder misfire) & P1316(misfire causing excessive emissions). I've just added seafoam gas additive. Any Ideas??? The funny thing is that this did not happen until I had the RR smogged, and it passed!!!!

Thanks VERY much for any help,
Kurt :)
 

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Could be an O2 sensor or 2 on the blink. If you have the dough, I'd take it in to a dealer to have them run their Testbook performance tests against the sensors (ramp-up / ramp-down times, etc). Beware that replacing these is a lot cheaper done outside the dealer network.

Good luck!

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Staffan Tj
'96 RR 4.6 HSE
Rioja Red / Walnut
115k
 
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