I have a 98 dodge 1500 and the catalytic converter is broken up inside i was wondering if i took it out and put a straight pipe in will the censor thats in the converter cause my truck to run any different if its not in.
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Hello Jamal, I had a catalytic converter go bad. I took it to a muffler shop. They put the car on a hoist while engine was running and used a cutting torch to blow a small hole before and after the converter to compare back pressures. My converter was plugged up .
If you have no catalytic converter and replace the muffler with a straight pipe,, you WILL NOT BE ABLE TO HEAR YOURSELF THINK!!.. I took the converter off mine and it was SOOO loud.(have a Flowmaster dual outlet).. It WAS TOO LOUD.. I put a 28" "glasspack" inline..WHEW.. I can actually hear the radio now!!!
Your catalytic converter is clogged up inside and has melted down.The rattle noise you here is a chunk of the inside of the catalytic converter that has melted and broken off.You will need to replace the catalytic converter.
You are right. The engine flexes differently, but not less. The designers that put the engine sideways also put the flex pipe in the design, and the shop is just saving money. I'm a mechanical engineer, and I can tell you the stresses on the joints will be higher without the flex pipe. I can't say for sure something will crack, but it is certainly more likely.
The upstream O2 sensors will be before the catalytic converter just down from where the exhaust pipe(s) attache to the exhaust manifold. The downstream O2 will be right after the catalytic converter. Once you crawl under the vehicle they will be pretty obvious where they are in the exhaust pipe.
PO420 code tells you the catalytic converter is not reaching the proper temperature .. that is measured by the back oxygen sensor (just behind the CAT ... make sure the heat shield is in place (in cold weather) .. you can check for a rattle in the cold CAT (thats bad) .. the rear O2 sensor can be bad or you could have a bad catalytic converter or one thats on it way to being bad .. there are some tests a mechanic can do .. 1. a back pressure test 2. measure the temperature of the CAT surface .. it should be around 225 deg F (after warmup) .. a non contact (IR) thermometer is handy for this .. make sure the pipe behind the CAT and the muffler are not leaking ..some "high flow rate " replacement mufflers will cause the trouble ..
Your Dodge Ram should run without the catalytic converter, but you're most likely also going to be running with the check engine light on all the time, due to the downstream O2 sensor.
With any vehicles built past 1996, with OBD II, I would not recommend the removal of your catalytic converter.
Under the truck, driver side exhaust pipe, there are 2, 1 is before the catalytic converter, the other is after. They screw into the side of the exhaust pipe.
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