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kenthompson · 02-25-2009

So the code 55 hasn't come back, I consider it a dead issue.

But now it's issuing code 63 and 64 regularly.

The fuel pressure seems to be functioning ok. I got the FP gauge (autometer 2663) on the a-pillor to work again, along with the air-fuel ratio gauge (autometer 2675). Fuel pressure is fairly reative after putting fresh fuel in the car this evening. Fuel pressure is 42 PSI at an idle or light cruising. Upon acceleration, it immediately goes to 53 PSI.

The A/F gauge however, is a different story. It rocks back and forth from absolute lean to rich rapidly. Could be a loose connection on the connector to the o2 sensor, or could be the o2 sensor on both sides. The car was running very rich for a while until I put the new tune on the chip.

Probably need to mention the A/F gauge is only tied to the left side o2 sensor.

But I'm still getting 63 and 64 codes, indicating lean conditions on both sides.

Could it be the o2 sensors are plugged?

02-25-2009	#15
kenthompson Join Date: Jul 2007 Location: Las Vegas Posts: 298	Re: New Tune on car, problems So the code 55 hasn't come back, I consider it a dead issue. But now it's issuing code 63 and 64 regularly. The fuel pressure seems to be functioning ok. I got the FP gauge (autometer 2663) on the a-pillor to work again, along with the air-fuel ratio gauge (autometer 2675). Fuel pressure is fairly reative after putting fresh fuel in the car this evening. Fuel pressure is 42 PSI at an idle or light cruising. Upon acceleration, it immediately goes to 53 PSI. The A/F gauge however, is a different story. It rocks back and forth from absolute lean to rich rapidly. Could be a loose connection on the connector to the o2 sensor, or could be the o2 sensor on both sides. The car was running very rich for a while until I put the new tune on the chip. Probably need to mention the A/F gauge is only tied to the left side o2 sensor. But I'm still getting 63 and 64 codes, indicating lean conditions on both sides. Could it be the o2 sensors are plugged?