ka24de misfires under throttle

[kyral]

So my s13 KA misfires when you push the throttle. it misses in neutral and in gear but if you are ever so gentle you can drive the car around and it will idle and cruise just fine no issues its only when you hit the throttle that it misses and like I said if you are very gentle it will accelerate without a miss

im thinking its the maf sensor the tps symptoms don't really seem to line up with the issues im having

the car is like new everything
new plugs
wires
distributor
ignition coil
ignitier chip
injectors have been checked multiple times and have been either replaced or flip flopped around all ohm at 10.8 and click open and closed with 12v
fuel pump primes like nobodies business

[cerealwars]

Reset your base idle and timing, follow the steps in the FSM. There's an entire troubleshooting guide in there to help you diagnose driveability issues.

[kyral]

Just found it in Engine fuel and Emission Controls


so i pulled the code 43 which is tps code
and the FSM says that if the TPS is bad it will default and run without the sensors inputs
so i unplugged the TPS and the car does the exact same thing no change what so ever

Dont think its the maf cause un plugged it still misses like hell under throttle under 2400 rpms

[kyral]

So I just replaced the ecu, the TPS, and checked the fuel pressure again and its 40psi, 45 psi while priming. and it scales whith the throttle while running up to 48-50 psi which seems correct
also ive double checked my injectors they are all working
I have no idea whats going on everything is new or has been swapped with known good parts but mostly its all new.
only thing that hasn't been swapped or is not new is maf and I ordered that the other day but I don't have very high hopes for it

[anthony_240]

Dam dude I’m having the exact same issue ... lmk if that maf helps out. I’m waiting for mine to come in as well ...


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[kyral]

Im also replacing the "ignition resistor condenser"

part # 28351-89901

[anthony_240]

Just checked mine, my dmm came in, and found it was my TPS... also since I had purchased a really cheap knock sensor I decided to replace it ... all good now man. Good luck... make sure your are testing parts before replacing.


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[kyral]

Just checked mine, my dmm came in, and found it was my TPS... also since I had purchased a really cheap knock sensor I decided to replace it ... all good now man. Good luck... make sure your are testing parts before replacing.


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Checked the wires and the tps sensor. sensor is good and so are all 3 wires going to it
I put my old plugs in and regapped them down from 42 to like 37 -38 and i think the car ran better.
im gonna gap them down to like 32 and see what happens
someone told me nissans like tighter than factory gaps

tighter gap didn't help
I did how ever switch to platinum plugs when I changed my coolant temp sensor and now my car went from running at maybe 20% to running at 90% but I still have a little hiccups when I rev but I don't know if it was the plugs or the sensor so im testing the coolant temp sensor wires tonight

[kyral]

PROBLEM SOLVED
it was a faulty reman distributor from or favorite reman company who is known for this
literally the first part i changed 3 months ago

[Wykydtron]

PROBLEM SOLVED
it was a faulty reman distributor from or favorite reman company who is known for this
literally the first part i changed 3 months ago

What company is that? :picardfp:

[kyral]

A1 cardone
the distributor was failure out of the box and didnt even work correctly for a second not even one revs worth of functionality out of the box. piss me off