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So I swapped out the coolant temp sensor and sender for the ones on my spare KA and now the temp gauge reads properly and I have no more code 13. I have no idea why the brand new ones I just bought didn't work properly. Double checked on nissan part dealer sites to see and they matched up to the sensors I bought.
Anyways, the car still has hesitation, though it's not as pronounced. TPS voltage is at 0.49v closed. Did an ohm test too and it read 1.2 kOhms closed, 8.7 kOhm WOT, and the TPS on my spare motor reads about the same. Injectors all read between 11-13 ohms. Really not sure where to go from here, ECU reading code 55 (no codes).
Things I haven't checked/replaced:
Ignition coil (factory)
Distributor cap and rotor (factory)
CAS (cleaned connector, figure it would throw a code if it was bad)
MAF (same as above, also bad MAF symptoms are pretty different from mine)
FPR
O2 sensor (it does look to be OEM and looks pretty dirty, but isn't the O2 responsible for cruising drivability? Disconnecting it at idle does nothing)
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