91 s13 ka24de [please help me:(]auto to manual swap running REALLY rich - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

MyBrokens13 · 03-17-2018, 12:53 AM

Hey guys, first post here, but I have a 91 s13 ka24de, (auto to manual swap), and my car is running really rich. Fouling plugs out in less then 5 minutes of driving. Need help to trouble shoot this problem. My teacher at school has a obd1 snap on scanner, it was reading 5.12 volts at idle-WOT, unplug it, and it's cuts to 0'00 volts.( this is before I swapped harnesses).What I've done so far(I work at O'Reillys, so I can try it and return it if it didn't help):
6 different a1 cardone MAF's. (Currently running oem maf because it's working the same as the remanned)
Coolant temp sensor.
All 4 injectors (new).
Replaced/cleaned/added grounds.
Spark plugs(like 10 sets, cause it's that rich).
Plug wires.
Replaced the engine harness with an uncut manual harness.
Tried 3 different ecu's including mine.
New cap and rotor.
Replaced the egi and egi pump relay.
Compression checked #1:105, #2:110, #3:115, #4:118.

I really need help because I don't know what else to do. Have checked every single thread on every forum about this and nothing that fixed their problem helped me. (Will add more as I remember.)

Brandon240sx · 03-20-2018, 07:04 PM

Try replacing your O2 sensor and make sure your air filter is clean

MyBrokens13 · 03-22-2018, 06:55 PM

Already replaced the o2 and the filter is clean. Didn't change at all.

supersayianjim · 03-22-2018, 08:02 PM

you have an adjustable fuel pressure reg?

MyBrokens13 · 03-23-2018, 10:45 PM

Just the OE Nissan one that came with the block.
I was thinking about getting one but I can't afford to keep spending all my money on something that might work.

MyBrokens13 · 03-23-2018, 10:47 PM

*also got it scanned by a snap on scanner and the maf read 5.12 volts plugged in. Unplugged it goes to 0.00volts. Swapped the whole harness and it's still doing the same thing.

03-20-2018, 07:04 PM	#2
Brandon240sx Zilvia Member Join Date: Aug 2017 Location: Long Island, NY Posts: 156 Trader Rating: (0) Feedback Score: 0 reviews	Try replacing your O2 sensor and make sure your air filter is clean

03-22-2018, 06:55 PM	#3
MyBrokens13 Join Date: Mar 2018 Location: FL Age: 28 Posts: 10 Trader Rating: (0) Feedback Score: 0 reviews	Already replaced the o2 and the filter is clean. Didn't change at all.

03-22-2018, 08:02 PM	#4
supersayianjim Nissanaholic! Join Date: Jan 2010 Location: location X Posts: 1,815 Trader Rating: (10) Feedback Score: 10 reviews	you have an adjustable fuel pressure reg? __________________ http://www.240sxforums.com/forums/rb...ject-s-rb.html

03-23-2018, 10:45 PM	#5
MyBrokens13 Join Date: Mar 2018 Location: FL Age: 28 Posts: 10 Trader Rating: (0) Feedback Score: 0 reviews	Just the OE Nissan one that came with the block. I was thinking about getting one but I can't afford to keep spending all my money on something that might work.

03-23-2018, 10:47 PM	#6
MyBrokens13 Join Date: Mar 2018 Location: FL Age: 28 Posts: 10 Trader Rating: (0) Feedback Score: 0 reviews	*also got it scanned by a snap on scanner and the maf read 5.12 volts plugged in. Unplugged it goes to 0.00volts. Swapped the whole harness and it's still doing the same thing.