Question about 2006 Infiniti G

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Car is running well.... No changes in gas mileage. Fault Po430 registered following check engine light illimunation. Mods: * cool air intake * Stillen pipes * plenum spacer 5/16" what is the issue? O2 sensor?? catalytic converter efficiency low??

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THAT MEANS ONE OF THE 02'S IT FALLING IN VOLTAGE DURING WARM UP,YOU NEED TO FIND OUT WHICH ONE,BANK 1 BANK 2,UPSTREAM OR DOWNSTREAM.










TIM

Posted on Jan 01, 2011

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Posted on Jan 02, 2017

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The previous owner has screwed things up by changing the air intake and eliminating the air temp sensor. The car's computer depends on a series of sensors to determine what fuel mixture it should command, and now it can't do that properly.

When the car is cold, it knows from the coolant temp, and it sends plenty of fuel, but when hot it is getting the mixture wrong.

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1. With the engine running and the fuel pump fully pressurising the system have you checked all the fuel lines for external leaks?

2. Have you replaced the mass air flow sensor?

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Dec 22, 2012 | Cars & Trucks

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Hi guys...my yaris is running rich, has poor gas mileage (360km on a full tank). and very slow and choppy idle (idles like a really old car) these are the things i have done so far : change air and fu


Do the following:
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4. Remove the negative battery terminal for 5 minutes.
5. Connect the battery terminal.
6. Check the engine oil level and coolant level.
NOTE: Before starting the engine shut off all lights and loads for example room light, blower, radio, parking light etc.
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1 Answer

Acura integra using too much gas. Just purchased a used acura integra and it has very poor gas mileage.


Hi GailKol

Is there a yellow light on the dash? Is the car very slow and struggles to rev?

It sounds to me that the ECU (car computer) is in 'limp home' mode. You need to read the ECU's code, usually by the ECU flashing lights, then look at the manual for the reason.

First up, reset the ECu by removing the negative battery lead for 30 minutes or remove the large 75AMP fuse. Run the car and see if the light returns or that it is still consuming too much gas. Then...>

One of the most common reasons for poor gas mileage on Acuras/Hondas is the O2 sensors in the exhaust manifold. These can breakdown instantly and cause rough running and poor gas mileage. There are two on the two exhaust banches. If you change one it is best to change both.

Check the air filter for dirt, clean it or buy a new one.
Take the air filter housing off and run car cleaner through the intake manifold.
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Check the cheap/free stuff mentioned above first. I hope this helps and don't give up on your Acura. You have one of the best driver's cars there of the last 25 years :)....I'm very Honda biased :)


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