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I have a 1996 infinity i30 w/160k miles which is very difficult to start in the morning. Seems like its either not getting fuel or is flooded. Started stalling, hesitating and bogging down. I changed the fuel filter and added injector cleaner which cleared it up for a while. It started stalling and bogging again and adding injector cleaner cleared it up again. All the while still difficult to start first thing in the morning.
Codes are p0136,p2270 and p2271. I'm wondering if the o2 sensor is really bad or if something else is going on. Thanks

Vehicle: 1996 infinity i30

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There is no information in the I30 factory service manual for the P2270 and P2271, and the P0136 is for the Oxygen sensor wich will not cuase a hard start problem. From what you describe the problem sound more like a bad fuel pump.

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