Enging Light On - P0455 & P0304

Tiny
SATURNTECH9
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You have a P0132?That trumps your P0174 O2 sensor codes get looked at first when set with the code P0174.
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Wednesday, January 8th, 2014 AT 7:21 PM
Tiny
JONATHANBUSSEY
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Could the intake temp sensor not having the correct reading cause the rough idle and cause the high fuel trim?

Does it still appear to be a vacuum leak?
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Wednesday, January 8th, 2014 AT 8:52 PM
Tiny
SATURNTECH9
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I ha've seen the inlet air temp unplugged and still run ok I would fix that for sure. But the p0132 is o2 sensor high voltage so if the o2 is reading too high then it would set a p0174 system rich correct? Also I have seen high voltage o2 readings cause a unstable idle because the computer is taking away fuel to try to correct the o2 reading so rich.
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Wednesday, January 8th, 2014 AT 9:05 PM
Tiny
JONATHANBUSSEY
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Makes sense. Are you suggesting the O2 sensor is faulty?
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Wednesday, January 8th, 2014 AT 9:16 PM
Tiny
SATURNTECH9
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O2 sensor wires terminal tightness etc.
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Wednesday, January 8th, 2014 AT 9:28 PM
Tiny
JONATHANBUSSEY
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Hello,

I think I found issue. Last night I pulled the EGR valve off and cleaned it out. It did not appear to be sticking and did not leak but I could see the Gasket was not in the best shape. I cleaned it all up and put it back on using sealant and fixed the stripped bolt.

I then used a spray rubber sealant and spayed all of the vaccume hoses and all around the Intake Manifold gasket and let it dry overnight. This morning the car purred like a kitten and even better the engine did not surge or shake at idle anymore. Beautiful!

As I drove to work I was reading the Fuel Trims and the Short Term FT was back and fourth between 5% LEAN (-) and would sometimes swing up but no higher than 15% and that was rare. The Long Term FT averaged around 14%.

At Idle the Fuel Trim averaged around 12% but no higher. This is much improvment than before!

You were definantly right about the vaccum leak!
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+1
Tuesday, January 14th, 2014 AT 6:50 AM
Tiny
SATURNTECH9
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If you look around the intake port by the power steering pump see if thr intake gasket looks wrinkled?If you can still see it under all that rubber spray lol.
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Tuesday, January 14th, 2014 AT 8:50 AM

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