Limp Stillen Supercharger dtc p1239

JWillis72

Did you try the throttle relearn?

My shield was about 12" long and deep enough that I could wrap it about half way the back of the lower filter. I screwed it to the metal bumper after hand bending it into shape. What you described sounded just like how my car acted but I don't recall if it gave me a code or not.

Swapping the MAF wires should make it change sides if that is the problem but if it's a bad MAF wire it would also change sides. I would say it's worth trying.

wymoteeZ

Yes, I always run through the 3 resets.
pedal released position relearn, throttle valve closed position relearn, & the idle-air volume relearn. The idle-air relearn can be tricky. My experience with that relearn procedure has taught me to recognize when it does not take correctly. (I think) After the 5 pedal pushes, 7 second wait, & the final pedal push --> if the check engine light goes steady before say 10 seconds, then you need to try again. If it's done properly, it will be in the 12-18 second range after the final pedal push, before the light goes steady & you release the pedal within 3 seconds from that. Then let it idle for 20-30 seconds.

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GTM STAGE II TT, EXTERNAL WASTEGATES, FI 3" TDX, BLITZ EBC, SZ HIGH 5, FI 500E FUEL RETURN, WALBRO 525, ID1050, ZEIT FLEXFUEL E85, SD TUNED with ECUTEK by SEB, SZ HIGH 5 CLUTCH, 2014 NISMO GUNMETAL WHEELS, 2015 NISMO FRONT, REAR, & SIDE SKIRTS

wymoteeZ

Here we go.
To sum it up so far. Originally getting code p1239 after Z disables itself in limp mode. Replaced full Throttle Body Bank2/left/driver-side. After the same problem, to see if it might be the lower-filter MAF air-turbulence problem, I switched the MAF cables under the hood to see if it would fault Bank 1 throttle position sensor instead. I am now getting the same p1239 code after that switch. So, it does not matter which MAF is sending the signal for Bank 2.
Moving forward to the Stillen Throttle Body extension cable. I checked continuity of each wire in the TB extension cable used for that Bank 2 Throttle Body. That looks good.
I have also used Osirus to check that my Accelerator Pedal is sending proper Voltage to both Banks equally.
I'm stumped. Had my 4 yr. old battery showing 12.00 volts at rest with Osirus.
Pulled it & had it tested --> showed good --> bought a new one anyway, & putting it in today.

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GTM STAGE II TT, EXTERNAL WASTEGATES, FI 3" TDX, BLITZ EBC, SZ HIGH 5, FI 500E FUEL RETURN, WALBRO 525, ID1050, ZEIT FLEXFUEL E85, SD TUNED with ECUTEK by SEB, SZ HIGH 5 CLUTCH, 2014 NISMO GUNMETAL WHEELS, 2015 NISMO FRONT, REAR, & SIDE SKIRTS

wymoteeZ

This is my Therapy post.
I've been battling this intermittent problem over a month.
I will personally strangle the original, overpaid developer of 'Limp Mode'.
please, nissan, just throw the code --> don't kill me.
(I love my Z) Lucky for me ... it is my weekend ride.
Yesterday, I went for a test drive after the engine-bay switch of the MAF cables (and successful idle-air-volume relearns after warm-up). I was trying to get home after it Faulted the same code. Basically, I-20 freeway cruising. It went limp, & I had to pull over in the EXACT same place that I have had to before. What the heck? I was looking for power lines, UFO's, CIA ?? Of course, I've driven past there several times without issue. It's a MIND thing.
Last night, going to get a new Battery (for Grins) ... I caught myself, in the TRUCK, driving in the right lane, in case I went Limp.

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GTM STAGE II TT, EXTERNAL WASTEGATES, FI 3" TDX, BLITZ EBC, SZ HIGH 5, FI 500E FUEL RETURN, WALBRO 525, ID1050, ZEIT FLEXFUEL E85, SD TUNED with ECUTEK by SEB, SZ HIGH 5 CLUTCH, 2014 NISMO GUNMETAL WHEELS, 2015 NISMO FRONT, REAR, & SIDE SKIRTS

wymoteeZ

Radioflyer,
I was just reading again the link you referenced Early On to me about p1239 & about the foil shielding on the TB extension cable. JWillis72 has been working with me help eliminate the MAF & filter-shield areas. I had not had a chance yet to say Thanks to You yet. Thanks. Now I see your post reinforcing the idea to shield. That is my next try today. Thank you for mentioning that it also needs to ground, awesome! Did you read my joke about power lines ?? In my p1239 Journey, I have actually had two exact places where it has gone limp. I will be better scouting both of those areas today. (simply because We want to Know)

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GTM STAGE II TT, EXTERNAL WASTEGATES, FI 3" TDX, BLITZ EBC, SZ HIGH 5, FI 500E FUEL RETURN, WALBRO 525, ID1050, ZEIT FLEXFUEL E85, SD TUNED with ECUTEK by SEB, SZ HIGH 5 CLUTCH, 2014 NISMO GUNMETAL WHEELS, 2015 NISMO FRONT, REAR, & SIDE SKIRTS

B&W_Evader

They also have things called ferrite beads to help kill electrical noise. Supper cheap, just clip them around the cable on the computer side.

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