If you get random misfire codes pull the intake manifold and replace it.....Most likely you're having a problem with the IMRCs......This can lead you in every direction of diagnosis.....
If you gut a cat that's illegal....lol....And if you want your downstream sensors to send the correct data I would tell your tuner you've done a cat delete and have it tuned for that....Everyone thinks spacers are the way...Even if they get that CEL off they are sending the wrong data to be stored and then eventually it will throw a lean code...especially with an aftermarket tune....
Besides an engine light how did the car drive with a bad O2 sensor. You said that it would misfire, was that at full throttle? My oxygen sensors are not throwing any codes but there’s something definitely wrong at full throttle because it is misfiring when I punch it
It was pretty bad. At first only on hard throttle. Then it just happened when ever you pressed the gas. It will mess up the motor the more you drive it like that. Mine didn’t show a light for a few days but still had the issue.
Here's some advice if you haven't figured out the problem......If your engine is naturally aspirated the IMRCs which are little flaps built in the manifold will start to stick and maybe even break. This is one of the hardest things to diagnose on coyote engines....Even the dealer has trouble......That being said.....It becomes basic maintenance to pull the intake off and inspect, clean and replace if necessary the intake manifold. If your car is forced air you lock these IMRCs open and tune correctly but naturally aspirated coyote engines need these Intake Manifold Runner Control flaps working perfectly for below 3000 rpms......I've seen all kinds of misfire codes and this is exactly one of the pin pointed problems that occurs......Trust me on this..!!!!!!!!
The misfire codes were due to the faulty O2 sensor. Once the sensor was swapped the code went away. I just replaced the wrong sensor. On this car the IMRC were good and checked about two weeks prior to this issue. This is good stuff to know for those who don’t know about them. Also my IMRC were locked before and pig tailed and I had no codes for either. This was an 18 manifold swap.
Man the passenger side sensor connector is impossible to get to it goes up over the transmission. I took it to a shop and they had to unbolt my entire exhaust (x-pipe and axle-backs) to have some space to get to it.
If your issue is just the sensor then no. I didn’t need to for the sensor but since I have long tube headers, it’s a good idea to get an extension which I did put in. My precious shop who installed them didnt do this.
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If you get random misfire codes pull the intake manifold and replace it.....Most likely you're having a problem with the IMRCs......This can lead you in every direction of diagnosis.....
If you gut a cat and put o2 spacer does its through a check engine light?
If you gut a cat that's illegal....lol....And if you want your downstream sensors to send the correct data I would tell your tuner you've done a cat delete and have it tuned for that....Everyone thinks spacers are the way...Even if they get that CEL off they are sending the wrong data to be stored and then eventually it will throw a lean code...especially with an aftermarket tune....
Besides an engine light how did the car drive with a bad O2 sensor. You said that it would misfire, was that at full throttle? My oxygen sensors are not throwing any codes but there’s something definitely wrong at full throttle because it is misfiring when I punch it
It was pretty bad. At first only on hard throttle. Then it just happened when ever you pressed the gas. It will mess up the motor the more you drive it like that. Mine didn’t show a light for a few days but still had the issue.
Here's some advice if you haven't figured out the problem......If your engine is naturally aspirated the IMRCs which are little flaps built in the manifold will start to stick and maybe even break. This is one of the hardest things to diagnose on coyote engines....Even the dealer has trouble......That being said.....It becomes basic maintenance to pull the intake off and inspect, clean and replace if necessary the intake manifold. If your car is forced air you lock these IMRCs open and tune correctly but naturally aspirated coyote engines need these Intake Manifold Runner Control flaps working perfectly for below 3000 rpms......I've seen all kinds of misfire codes and this is exactly one of the pin pointed problems that occurs......Trust me on this..!!!!!!!!
The misfire codes were due to the faulty O2 sensor. Once the sensor was swapped the code went away. I just replaced the wrong sensor. On this car the IMRC were good and checked about two weeks prior to this issue. This is good stuff to know for those who don’t know about them. Also my IMRC were locked before and pig tailed and I had no codes for either. This was an 18 manifold swap.
Man the passenger side sensor connector is impossible to get to it goes up over the transmission. I took it to a shop and they had to unbolt my entire exhaust (x-pipe and axle-backs) to have some space to get to it.
By the way what code were you getting?
I would have to go back and look. I think I did a screen shot for the video but can’t recall if I put it In there. P255 I think was one.
When changing the o2 sensor are you suppose to change the whole harnes also?
If your issue is just the sensor then no. I didn’t need to for the sensor but since I have long tube headers, it’s a good idea to get an extension which I did put in. My precious shop who installed them didnt do this.
What code did u had???
Falto re programar el vehiculo
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