Aftermarket fuel injectors ok? 2016 CX-5

[johnnyp12]

So we figured it out right? Heard from others with this issue that it's just the injectors seal(s) that have gone bad. Wondering if anyone just replaces just the injectors seals?

 

[AL Cx5]

So we figured it out right? Heard from others with this issue that it's just the injectors seal(s) that have gone bad. Wondering if anyone just replaces just the injectors seals?

VERY interesting! So your misfire is from a vacuum leak?

One way we find vacuum leaks is to spray the intake manifold, injectors, hoses and such with brake fluid with the engine running.

Do one item at a time. If it's got a vacuum leak the the engine will stumble, idle at a lower RPM. I would spray number 4.

IF #4 injector seal is leaking air, I would change out the seals on all of the injectors.

Great find, I hope this solves the issue!

 

[cdmain]

I only replaced spark plug #1 as recommended on the forum posts and left the issue as is.

However yesterday while driving a code P2096 was triggered. Fuel trim lean bank 1. No other code with it.

Been going back and forth with Chatgpt to understand where the issue could be. I am very impressed that this AI tool can even interpret screenshot of freeze frame data.

It did happen few days after I emptied a bottle of liqui Moly fuel conditioner into my gas tank.

I reset the code since Chatgpt 'advised' it could have been temporarily triggered by the fuel cleaner , if it comes back again then its the downstream O2 sensor. Hope its not the cat though.

Could also be the bad injector reducing flow but the car performs normally.

I plan to see the mechanic in a few weeks if the code returns.

 

[AL Cx5]

I only replaced spark plug #1 as recommended on the forum posts and left the issue as is.

However yesterday while driving a code P2096 was triggered. Fuel trim lean bank 1. No other code with it.

Been going back and forth with Chatgpt to understand where the issue could be. I am very impressed that this AI tool can even interpret screenshot of freeze frame data.

It did happen few days after I emptied a bottle of liqui Moly fuel conditioner into my gas tank.

I reset the code since Chatgpt 'advised' it could have been temporarily triggered by the fuel cleaner , if it comes back again then its the downstream O2 sensor. Hope its not the cat though.

Could also be the bad injector reducing flow but the car performs normally.

I plan to see the mechanic in a few weeks if the code returns.

Cool that AI can interpret a log!

How is you fuel economy? If O2s have lost sensitivity, the tell the ecu it's running lean. The ecu adds more fuel.

Have removed #1 plug and see if it's normal? Maybe the FI cleaner fixed it. But driving rich long term will wear that cylinder and dute the oil. Getting the oil analyzed will provide more info on how sever of an issue.

 

[Mazdiod2]

Is contamination what causes the O2 sensors to fail? They can last a long time, maybe 100k miles, maybe more sometimes.

 

[AL Cx5]

Is contamination what causes the O2 sensors to fail? They can last a long time, maybe 100k miles, maybe more sometimes.

O2s "last" a long time, for sure. They lose sensitivity and tell the ecu to add more fuel when it's not needed but are still "working". Contamination and just wear and tear makes them send an incorrect reading to the ecu.

If one waits for a CEL light, they have been running thousands of miles rich. This increases the cost of operation and wears out the engine faster.

The MAF/IAT loses calibration over time as well. Like the O2's it sends incorrect info to the ecu. The ecu picks less than ideal settings based on the incorrect info. I just went through this on my Cummins diesel. My IAT sensor died the last 200 miles of a 1400 mile trip. Suddenly it ran like a turd. When I got home I swapped in a used spare. CEL light cleared and stayed off. Truck still ran but was now like half a turd. The new IAT sensor arrived a few days latter and the truck was back to normal. This applies to our Mazdas too. Crap sensors tell the ECU an incorrect point of operation.

Back in the day, I raced a "street" rod at the track and used leaded, oxygenated race gas. We knew we were killing the O2s but wanted the extra 50 HP. We could kill O2 sensors in one afternoon. We logged every race and could see from the logs that the AFR was reading leaner and leaner. We would put in new O2s and poof, AFR was spot on again. I still have scars on my forearms from changing hot O2. We found a work around and stopped using O2s. With a well developed fuel map we stopped using O2s and started reading spark plugs the old school way....

I'll change out O2s and MAF/IAT sensors on our CX5 near the 100,000 mile mark. I call this a 100K tune up. In addition to this, the oil will be treated with 1/2 qt HSS Stiction Eliminator. I did all of these to our 09 Accord at 100k. FE and throttle response improved enough that my wife asked what I did to her car!