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Old 08-15-2018, 09:46 AM   #1
nissanracer29
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KA ka24de-t running rich and rough idle

Hello I am trying to find out what would typically cause the rough idle and running rich issue. Aside from the MAF what other sensor typically are known to cause this issue. I am thinking its either a stuck injector or fuel pressure regulator? If it was a boost leak the idle would be off but it would not be rich correct? Any and all advice will be greatly appreciated. Thanks

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Old 09-02-2018, 07:51 AM   #2
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My car has a rom tune and is converted from obd2 to obd1. I pulled the codes and it said maf and knock sensor. I replaced the maf and it didnt help. Any ideas?
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Old 09-02-2018, 02:52 PM   #3
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Is it rich at idle or only in boost?
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Old 09-02-2018, 06:37 PM   #4
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while idling, unplug each injector harness clip and see if it gets more rough. Then plug it back up and do that with each.

If one doesn't make any changes, then verify you are getting spark on that cylinder. If you can verify spark on that cylinder, the injector may be stuck
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Old 09-04-2018, 11:48 AM   #5
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What's the set up you're using? What's the tune set for? What parts are you actually using?
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Old 09-19-2018, 09:05 AM   #6
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Are you running your AFM in a charge pipe or intake side of the turbo ? Try running the car with the air sensor not plugged in if it runs better with it off yeah mafs if it’s the same with it on or off something else is wrong wiring somewhere
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