Will higher volume injectors damage catalytic converter?
Posted: Thu Mar 15, 2018 2:30 am
Hello,
I hope it is okay to ask an OEM related question here, I figured you guys would know the most about theory involving injectors a non-stock setup.
I recently had a low mileage engine installed in my 1999 Toyota Camry. The "new" engine was from a 2001, and while the internals and most peripherals are identical, the injectors are different. It is possible that the injectors from the 2001 engine are higher volume than my original engine (see below for detailed discussion about this*)
Anyhow, I wanted to use the "newer" injectors if possible for two reasons: 1) the old injectors have 300k miles on them, 2) the new injectors (from what I have researched) are a superior design giving much better atomization. (They are both Denso injectors)
I observed more power after the engine swap (though possibly due to factors other than injectors) and no apparent decrease in fuel economy.
After the installation and running the car about 500 miles, I got a P0420 code indicating the converter is running less than optimal. I was able to clear the code by fixing an exhaust leak (which appeared after disturbing the old exhaust system during the engine swap). However, this brought my focus on catalytic converter operation and I started doing some research into them.
My question:
If the "new" injectors are indeed larger volume, will running them (while still using the stock ECU/programming) damage my catalytic converter? And, if so, might I have damaged it already after 500 miles?
Thanks,
Kevin
*The only information I could get on the difference in volume on the injectors is:
1999: 225cm
2001: 265cm
I do not know how accurate those specs are; after scouring the internet and calling several injector refurbishing shops, finding actual specs on these particular Denso injectors was impossible to find. The only exception was just what someone had posted on a Toyota forum based on the Toyota part numbers. When asking the poster what the source was, they were not able to give it to me; just some figures they had "lying around from somewhere". So whether those values are correct I cannot confirm.
I hope it is okay to ask an OEM related question here, I figured you guys would know the most about theory involving injectors a non-stock setup.
I recently had a low mileage engine installed in my 1999 Toyota Camry. The "new" engine was from a 2001, and while the internals and most peripherals are identical, the injectors are different. It is possible that the injectors from the 2001 engine are higher volume than my original engine (see below for detailed discussion about this*)
Anyhow, I wanted to use the "newer" injectors if possible for two reasons: 1) the old injectors have 300k miles on them, 2) the new injectors (from what I have researched) are a superior design giving much better atomization. (They are both Denso injectors)
I observed more power after the engine swap (though possibly due to factors other than injectors) and no apparent decrease in fuel economy.
After the installation and running the car about 500 miles, I got a P0420 code indicating the converter is running less than optimal. I was able to clear the code by fixing an exhaust leak (which appeared after disturbing the old exhaust system during the engine swap). However, this brought my focus on catalytic converter operation and I started doing some research into them.
My question:
If the "new" injectors are indeed larger volume, will running them (while still using the stock ECU/programming) damage my catalytic converter? And, if so, might I have damaged it already after 500 miles?
Thanks,
Kevin
*The only information I could get on the difference in volume on the injectors is:
1999: 225cm
2001: 265cm
I do not know how accurate those specs are; after scouring the internet and calling several injector refurbishing shops, finding actual specs on these particular Denso injectors was impossible to find. The only exception was just what someone had posted on a Toyota forum based on the Toyota part numbers. When asking the poster what the source was, they were not able to give it to me; just some figures they had "lying around from somewhere". So whether those values are correct I cannot confirm.