dakotahchore
09-28-2013, 10:57 PM
Okay, so I have a Datsun 510 with a KA24DE swapped in. Everything was running well, but then I spun a rod bearing.
Fast forward, I fully rebuilt the motor with new everything. Mechanically, the motor is fine and idles really well regardless. No misfiring or bogging or dying. However, it seems to be stuck in the same mode I once experienced with an unplugged MAF... won't rev past 2500, just bounces off that like it's a rev limiter.
I read the codes, which hadn't been reset since the last motor went out.. Got a knock sensor error. Reset codes manually and after multiple starts and several minutes idling/revving still just getting 55 back when I test it. No error codes.
I have tried unplugging the MAF while running, running without the MAF, etc. Nothing changes. It idles fairly well then can't rev any higher than 2500 regardless if the MAF is plugged in or not. Also, I get a faint scent of fuel like the motor is running pretty rich. There are no changes when I unplug or plug the MAF while the car runs. For some reason, even unplugging or running without the MAF my ECU doesn't get any errors.
Not really sure where to go from here. I searched and it doesn't seem anyone else has my issue.. the motor doesnt have any trouble starting or running or revving, it's just completely limited to 2500 regardless of my MAF status.
Fast forward, I fully rebuilt the motor with new everything. Mechanically, the motor is fine and idles really well regardless. No misfiring or bogging or dying. However, it seems to be stuck in the same mode I once experienced with an unplugged MAF... won't rev past 2500, just bounces off that like it's a rev limiter.
I read the codes, which hadn't been reset since the last motor went out.. Got a knock sensor error. Reset codes manually and after multiple starts and several minutes idling/revving still just getting 55 back when I test it. No error codes.
I have tried unplugging the MAF while running, running without the MAF, etc. Nothing changes. It idles fairly well then can't rev any higher than 2500 regardless if the MAF is plugged in or not. Also, I get a faint scent of fuel like the motor is running pretty rich. There are no changes when I unplug or plug the MAF while the car runs. For some reason, even unplugging or running without the MAF my ECU doesn't get any errors.
Not really sure where to go from here. I searched and it doesn't seem anyone else has my issue.. the motor doesnt have any trouble starting or running or revving, it's just completely limited to 2500 regardless of my MAF status.