Pass emission without catalytic converter

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You should upgrade or use an alternative browser. PA emissions question. Can I pass with no cat? Thread starter PlanZero Start date Jun 6, PlanZero Proven Member. I purchased a 3" cat back recently for my 96 Tsi and after inspecting the horrendous condition of my down pipe and cat I decided to just get a 3" downpipe, obviously with no cat. I live in PA, and the place I go for inspection does not do a visual emissions test.

I planned on just keeping the old dp for testing, but after doing some research I don't even know if that's necessary. I'm not sure what other data is read, if any, by the state emission computer.

Sort by date Sort by votes. I don't know of any vehicle being able to pass emissions without a cat. That's the major part of the system, so to pass, you'll need it. Upvote 0. In Easton, no you will not pass. It differs from county to county in PA though.

I hear that in the Poconos they have no emissions testing requirements. In Northampton County, they will likely do a visual check and they certainly test for emissions. If the car isn't your daily, do what I did and register it as a classic.. Emissions exempt!

My city doesn't have emissions laws thankfully , but Denver, 60ish miles north does. However I got a ticket last month for an aftermarket exhaust, just because it's not oem. Yet that makes no sense in a city with no emission laws. Your car is registered in Easton? If so, that's Northampton which requires an OBD and gas cap check. Assuming your O2 simulator works no codes set and there's no CEL, you should pass the emissions test as the computer detects no codes and the inspector observes that the CEL is not illuminated.

Based on that, you should be issued an emissions sticker. As for the readiness monitors, model year cars are allowed 2 monitors not ready. Regardless, if the emissions computer passes your car and your CEL isn't illuminated, you should be issued an emissions sticker. Now, regarding the annual state vehicle inspection, there is a visual inspection of the emissions equipment portion for counties which do not have an OBD check.

Technically, this portion does not apply to you so you should "technically" pass the state inspection without a cat as the inspector doesn't need to do a visual inspection of emissions components for your county. If the inspector misses the fact that there is no cat installed while looking under the vehicle, you should be issued an inspection sticker. If he does see that there is no cat installed, technically, he should still pass the vehicle for state inspection, but will he?

Who will you complain to if he doesn't? As you can see, there is a gray area here as the law does not take into consideration for O2 simulators. It's assumed that if there is no code set for cat efficiency, then there's a cat present and that it's functioning properly. Did you ever have emissions inspection issues with the OBD readiness monitors not ready?

Last edited: Jun 7, I personally do not care for the o2 spacers. I prefer the electronic one that you wire into the sensor and still uses the heater signal from the o2 sensors. You can also build one pretty cheaply. I believe you can find it on VFAQ. Holy crap AWDpetmitsu, you are the expert I was hoping to hear from. If you own an old vehicle you can so easily protect yourself from dishonest mechanics by using these remarkable gadgets.

Im specifically referring to portable auto diagnostic gadgets that you can just plug into your vehicles engine diagnostic outlet under the steering wheel. Here are two of my favorite diagnostic tools, which syncs to your smartphone quickly and the standalone. This article is accurate and true to the best of the authors knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.

More carbon on bumper to clean off. This is because as the gases enter the empty chamber, exhaust velocity slows down. This backpressure now works against the flow of spent gases out of the cylinder when the exhaust valve opens, causing the piston to do all the work.

Now, energy is being wasted for gas removal that could otherwise be used to turn the crankshaft. Using a straight pipe would be better than gutting the oval container, for an up to 20HP gain..

Re: Is it possible to pass emission without catalytic converter? Phaze2 Mike Re: Is it possible to pass emission without catalytic converter? Make sure your vehicle is in fuel control. Modern cars have two fuel control modes, closed loop and open loop. When the car is in open loop, it is simply running a pre-made map, and makes little to no changes to the amount of fuel it delivers.

When a vehicle is in closed loop, it is closely monitoring the engine and adjusting fuel and timing to create the proper air fuel ratio, and a good clean burn.

Learn more about closed loop Vs. Open loop by understnading how check engien lights work. The sensors should switch back and forth between high and low values. Many oxygen sensors are one volt systems, and will therefore switch between. Other systems are five volt, some are 1. The main thing to look for is rapid switching between low and high values. If the oxygen sensor is switching, then the ECU is adjusting fuel.

If an oxygen sensor is switching slowly, or sticking at a value, then there is a gross failure in the fuel control system. If the car is equipped with a MAF, check to make sure it is clean. A dirty MAF can cause a lean condition. Removing and cleaning the catalytic converter is another potential fix. After removing the catalytic converter, use a pressure washer to blast out any contaminants from the matrix.

Be sure to flush the unit from both ends. Another way to clean the catalytic converter is to soak it overnight in a combination of hot water and degreaser or laundry detergent. This process takes longer but is necessary to dissolve the deposits clogging up your catalytic converter. After washing or soaking, be sure to dry the catalytic converter completely before reinstalling.

Re: can a car with no cats pass emission? Buffalo Dude. Robert Holtman Re: can a car with no cats pass emission? Is this true? I just want to know if i can trick the computer test or if ill actually have to replace the DP with a stock one whenever i have to get tested?

If you live in NJ they physically stick a reader into the muffler of your car to test how much fumes are coming out the back end of your car. So, If you have no cat expect to fail with flying colors. And that someone is an idiot. To stay in compliance with the State of Tennessees smog check requirements, Tennessee-registered drivers must get their vehicles to pass a vehicle emissions test if they live in certain regions of the state.

They only do a visual inspection to make sure the emissions controls are there. What you might be able to do to pass this visual is to put on only the shells of an empty catalytic converters in your exhaust system. If they do, your only way to pass that is to purchase a tune from someone else who will change the values for you.

Failure on the sniff test means you do not get your DPS sticker. You cannot pass the sniff test, and I seriously doubt even the best non-fouler trick will work. Your engine misfires. Your car noticeably uses more fuel.

Your car isn't performing the way it used to. Your car fails an emissions test or it has more emissions than normal. What Causes a Catalytic Converter to Fail? Engine Tune-Up Required. Oil or Antifreeze Entering the Exhaust System. Unburned Fuel Entering the Exhaust System. Oxygen Sensor Not Functioning Properly. Short Trips. Can you pass inspection without a catalytic converter? Category: automotive auto parts. BUT - some places will require you to simply pass the emissions tests for the age of the vehicle.

So, if you can get the emission levels low enough without a Cat converter , then it will pass. One way is that it just has to be built before Catalytic convertors were mandatory equipment. Will a gutted catalytic converter throw a code?

Does catalytic converter cleaner really work? How do you bypass a catalytic converter? How to Bypass a Catalytic Converter. Pull the vehicle onto a pair of auto ramps and set the parking brake. How much does it cost to fix a catalytic converter?

How do I get around my emissions test? Do o2 sensor spacers really work? Will an o2 sensor work without a catalytic converter?

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