Mazda
Greenie N00B Member
Hello everyone,
I am writing from a shop in South Carolina. We recently installed a replacement motor for a customer into a 2013 Mazda 3 Speed 3. The motor was purchased from JDM. This is our first Speed 3 swap and we do not claim to be experts on these particular cars/models. This is a general auto repair facility.
While we were doing the swap, we noticed that there were a few things different about this motor from the other motor. First of all, it had a cartridge, rather than a spin on filter. Second of all, it had a different, non-red oil filler cap. Third, there was a plate on the oil pan for the motor that we were installing, whereas the motor that we took out did not have that plate. After looking at a few threads on this forum, I came to the conclusion that the motor that we swapped into this car was a GEN 1 Speed 3 motor. Our car is apparently a GEN 2 Speed 3.
Now, the vehicle cranks up and runs well, but it has some drivability issues. First of all, it kind of stutters sometimes on hard acceleration, like an ignition misfire might be present. Additionally, sometimes, it feels like somebody cuts a switch under hard acceleration/boost and the vehicle bogs down in the middle of a pull. In the parts catalogue, the coils from GEN 1 motors to GEN 2 motors seem to have different part numbers. However, they looked the same and plugged up ok, so we tried them in this new motor, but there was not a change in the way it was running. Customer himself swapped the plugs after we did the replacement of the motor, but that didn't help.
This car has a lot of aftermarket parts on it that the customer got us to swap from his old motor.
This car has had some tuning done on the PCM.
This car has a few cheap, aftermarket parts on it.
And now, I seem to have figured out, this motor is a GEN 1, while the car is GEN 2.
I am not asking anyone to help me figure out the root of the problem, but I am hoping that someone on here might offer some guidance as to whether a GEN 1 motor will work OK in a GEN 2 car. JDM says that I shouldn't have a problem with it, but I am perhaps a little skeptical. I have seen some other threads that say the PCM is not interchangeable between generations. Could this be the root of my problems? Should I then source a GEN 1 PCM for this 2013 car? Can a used PCM be programmed on these cars? Will it plug up ok into the GEN 2 harness?
The only code present is a p0139 02 slow response code. Sometimes, when this problem is occurring, the traction light will flash at you, though you are clearly not losing traction. No code stored in the ABS module though.
It looked like you all were the experts on these cars, so I would appreciate any advice that you might be able to offer on this subject.
Thank you for your time and have a nice Holiday!
Josh
I am writing from a shop in South Carolina. We recently installed a replacement motor for a customer into a 2013 Mazda 3 Speed 3. The motor was purchased from JDM. This is our first Speed 3 swap and we do not claim to be experts on these particular cars/models. This is a general auto repair facility.
While we were doing the swap, we noticed that there were a few things different about this motor from the other motor. First of all, it had a cartridge, rather than a spin on filter. Second of all, it had a different, non-red oil filler cap. Third, there was a plate on the oil pan for the motor that we were installing, whereas the motor that we took out did not have that plate. After looking at a few threads on this forum, I came to the conclusion that the motor that we swapped into this car was a GEN 1 Speed 3 motor. Our car is apparently a GEN 2 Speed 3.
Now, the vehicle cranks up and runs well, but it has some drivability issues. First of all, it kind of stutters sometimes on hard acceleration, like an ignition misfire might be present. Additionally, sometimes, it feels like somebody cuts a switch under hard acceleration/boost and the vehicle bogs down in the middle of a pull. In the parts catalogue, the coils from GEN 1 motors to GEN 2 motors seem to have different part numbers. However, they looked the same and plugged up ok, so we tried them in this new motor, but there was not a change in the way it was running. Customer himself swapped the plugs after we did the replacement of the motor, but that didn't help.
This car has a lot of aftermarket parts on it that the customer got us to swap from his old motor.
This car has had some tuning done on the PCM.
This car has a few cheap, aftermarket parts on it.
And now, I seem to have figured out, this motor is a GEN 1, while the car is GEN 2.
I am not asking anyone to help me figure out the root of the problem, but I am hoping that someone on here might offer some guidance as to whether a GEN 1 motor will work OK in a GEN 2 car. JDM says that I shouldn't have a problem with it, but I am perhaps a little skeptical. I have seen some other threads that say the PCM is not interchangeable between generations. Could this be the root of my problems? Should I then source a GEN 1 PCM for this 2013 car? Can a used PCM be programmed on these cars? Will it plug up ok into the GEN 2 harness?
The only code present is a p0139 02 slow response code. Sometimes, when this problem is occurring, the traction light will flash at you, though you are clearly not losing traction. No code stored in the ABS module though.
It looked like you all were the experts on these cars, so I would appreciate any advice that you might be able to offer on this subject.
Thank you for your time and have a nice Holiday!
Josh
