Question about 2007 Kia Sorento 4x4

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Unleaded fuel Hi Can the catalitic converter be removed and replaced with a straight pipe to save it from being ruined. Would removing it cause any other problems THANKS

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Hi again,

None that I know of in relation to the engine's performance. The catalytic converter's job is to greatly reduce the level of harmful emissions in a car's exhaust. Though would not be correct from an environmentalist's point of view, it is from a technical point of view allowable to remove this. Of course back pressure and exhaust tuning would be affected but in general should work just right.

Though I would recommend that you just leave it as it is since as earlier posted, it is responsible for cleaning up your engine's emission.

Posted on Jun 15, 2008

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Hi I own a 1990 Cadillac Deville 4.5 MPI recently the catalictic converter became clogged so I removed it replacing it with a straight pipe then it ran like **** so replaced spark plugs checked contin


First I should warn:: straight pipe can get you in trouble with the law. But what has happened is your car uses a o2 sensor to monitor the flow of air in the system. By removing the converter you have disrupted the flow and now the engine computer is receiving the wrong readings and telling the fuel system to enrich causing spark plugs to fowl. You will have to return the balance to correct the problem or change the chip in the computer.

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I've code p430 and p1000 and it said something about air gas controller


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Can I run straight pipe on my 2000 ford windstar sel?


If you are going to run a straight pipe to do away with the converter, I would not do that, as it violates Federal Law. Also, a lot of newer cars have an O2 sensor south of the converter that monitors the converter efficiency, removing the converter may cause the check engine light to come on.

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Hi how can i convert my 1976 4.2 damlier jagaur coupe from leaded fuel to unleaded fuel


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Exact location of downstream O2 sensor.


Downstream O2 sensor is after (downstream) the catalitic converter on the exhaust pipe. Upstream O2 sensor is after (downstream) the engine exhaust manifold - before (upstream) the catalitic converter. Upstream O2 sensor controls air-to-fuel ratio to yield a small excess oxygen. Downstream O2 sensor assesses the catalitic converter performance.

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You can buy a suction hose small enought to get intothe tank at an auto parts store. you will have to remove the fuel from the tank. All of it and then replace fuel filter.

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1 Answer

PO420


Not just a faulty catalytic converter will trigger this code. Many other issues can trigger this code.

  • Leaded fuel was used where unleaded was called for
  • An oxygen sensor is not reading (functioning) properly
  • The engine coolant temperature sensor is not working properly
  • Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe
  • Delayed spark timing
  • The oxygen sensors in front and behind the converter are reporting too similar of readings
Possible solutions:
  • Check for exhaust leaks at the manifold, pipes, catalytic converter.
  • Replace Coolant Temperature Sensor
  • Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
  • Inspect the downstream heated oxygen sensor (HO2)
  • Replace the catalytic converter
  • Have timing adjusted


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My 1990 Cadillac Seville is stalling out


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Unleaded fuel


Hi,

Am afraid nothing much you can do since you have to make do with what is locally available. However, a couple of things you can keep in mind:
1. Using leaded fuel with a car intended to use unleaded fuel would destroy your car's catalytic converter faster than normal wear and tear;
2. At times unleaded would be available, pls use as much as possible to help clean/remove the lead additive, tetraethyllead that will cover some soft engine parts with the lead-containing material;
3. you may have to tune your engine's timing to compensate for the leaded fuel.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Jun 15, 2008 | 2007 Kia Sorento 4x4

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