05 350z Timing / Engine Swap

Post by **cajuncustoms** » Wed May 25, 2022 2:34 pm

I have a 05 350z De that i have been building bought from a salvage auction ,one thing i have been fighting is the p1136 code , p0021 , and on off p0327 , the car has 151k miles , the codes are on when you get on it , if you start it baby it stay under 3500 rpm no codes. car runs fine and strong unless you get it to pop a code then it will sound like it has a miss stumbles in park but still runs fine.

Ive done the normal , changed the VVT , changed the gaskets , pop checked the one i took off it was fine , changed the knock sensor and harness , harness in the car has been swaped out , old one was bad , ecm has been uprev tuned , changed the cam crank sensor with hitachi sensors , changed coil packs , plugs , injectors have been cleaned and tested , oil is new , fuel is new 93 , had bad gas sat for like 2 years pumped it out drove it 50 miles but im stuck on these codes . im starting to think the only thing left is gallery gaskets and timing.

complete parts from z1 are about $850 . im a diesel mechanic so i can spin a wrench , never messed with car timing but eh tomato tamato
JDM engine 2k

cylinders have over 200 on compression test so it is strong it was mentioned with the compression the motor might be built but i have no history on that, i just dont know in the end is it worth it to fix or swap.

Post by **cajuncustoms** » Wed May 25, 2022 2:36 pm

This is it so far

Post by **VStar650CL** » Wed May 25, 2022 3:23 pm

P1136 is strictly an electrical code, it gets thrown when the ECM sees too much or too little current flowing through the Bank2 IVT solenoid coil. The P0021 is probably derivative, find the electrical issue and chances are it will disappear when the P1136 does. Unfortunately the ECM doesn't discriminate between high or low current, the code just means it's abnormal. But given that you tried a new IVT, most likely there's a bad pin-fit or open wire causing the issue.

The P0327 is probably unrelated and could be either an open wire or a short to the shield ground. The knock produces an AC voltage that rides on a 5V level from the ECM, so it really only has one wire. The second wire is a shield ground for the coaxial signal wire. You should see 5V on the signal wire with the key on, if it's low or dead then your problem is in the wiring. If it's normal then you have an internally-shorted knock.

Post by **cajuncustoms** » Wed May 25, 2022 3:57 pm

hrmm the knock and cable were replaced , the vvt code , i wouldnt think it was wiring as the harness was just installed although used i didnt see any problems with it . so timing or gallery gaskets cant cause a low oil to the vvt ? that would make me happy for sure as i really dont want to crack this thing open unless i have to. i have noticed some wierd things on the computer when looking at throttle position sensor bank 2 with key on engine off bank 1 sits at 0.73v bank 2 fluctuates between 63 and 65 just moving every second or 2 , not sure if it means anything just something i noticed.

Post by **cajuncustoms** » Wed May 25, 2022 4:06 pm

few computer shots

Post by **VStar650CL** » Wed May 25, 2022 6:03 pm

The TPS can cause both codes indirectly, and so can the CMP sensor if it's missing teeth intermittently. Your TPS readings are a mess, I'm really surprised you're not getting a P2135. TP1-TP2 work opposite one another and TP2 should be 4.5V+ with the throttle closed. See the chart on EC-233 here:
https://www.nicoclub.com/service-manual ... 5%2Fec.pdf

Post by **cajuncustoms** » Wed May 25, 2022 6:12 pm

cam sensors are new , not sure on the missing teeth never looked but i do have a shot of the valve cover open on that side

Post by **cajuncustoms** » Wed May 25, 2022 6:14 pm

i printed out that page you told me , ill try that anything else i should try , and thanks for the help ive been fighting this for over a few months trying to get the car roadable , i had some help from a guy on 350z forums he cleaned and flow tested my injectors for me.

Post by **VStar650CL** » Wed May 25, 2022 6:55 pm

No, "missing teeth" means failing to trigger electrically for every tooth on the gear that passes by, not that a tooth is physically missing. When there's a gap in the signal on the CMP or CKP, the ECM no longer knows the right spot to fire stuff off or how fast stuff is moving, so it can obviously induce all sorts of codes and problems.

Post by **cajuncustoms** » Wed May 25, 2022 7:24 pm

i see what it says i need to check the values both on and off pedal but if those values are off it doesnt tell me where to go from there as the next steps are for different p codes

Post by **VStar650CL** » Wed May 25, 2022 7:55 pm

It's pretty much a pair of simple voltage dividers, so if you measure both at closed throttle and WOT with the engine off, it should be pretty easy to figure out what's going wrong. You might also want to back-probe the signal pins at the TPS to see if the voltmeter readings match the scanner readings, if not then it means a problem in the signal wires.

Post by **cajuncustoms** » Thu May 26, 2022 12:30 pm

I got to check it out today , on and off throttle with the key on not running it is within spec of that sheet , i took multiple videos of different fields and one of the engine idling seems ruff , also i noticed fans not coming on at 195 , i can manually make them come on with the computer , im starting to wonder if its a possible ecm issue , i sent the ecm to z1 had it uprev tuned and nats deleted , im wondering if they could see a problem when they had it or they just do what they do , nats delete worked fine , im just throwed off on this car, i seen a place in Fla that repairs computers called Solo Auto Electronics dont know if i need to do that or not , this thing has me spinning in circles

Post by **cajuncustoms** » Thu May 26, 2022 4:13 pm

Ok here are some videos , this one i hear a knock first time every hearing it , but not surprised with the problems im having [youtube]https://www.youtube.com/shorts/LyKpAAsksuk[/youtube]

Post by **cajuncustoms** » Thu May 26, 2022 4:19 pm

VVT Key On Engine Off

Post by **cajuncustoms** » Thu May 26, 2022 4:20 pm

VVT On Rev

Post by **VStar650CL** » Thu May 26, 2022 4:27 pm

I think I'd be wondering about the ECM too, and the TPS wiring. Good readings today don't explain the goofy ones you got earlier.

Post by **cajuncustoms** » Thu May 26, 2022 4:30 pm

i just think its crazy bank 2 is 0.00 i even checked the voltage at it with the key off was battery volts

Post by **cajuncustoms** » Thu May 26, 2022 4:32 pm

here is the TPS today

Post by **cajuncustoms** » Thu May 26, 2022 4:37 pm

just noticed you were a nissan master tech lol , looks like i got the right guy , i know a master tech here in louisiana but he moved dealers havent seen him again , great guy real good too

Post by **VStar650CL** » Thu May 26, 2022 4:37 pm

Your vids are showing up as "private", but I get the point. I think it must be either some miswiring or a wrong/nutty ECM.

Post by **cajuncustoms** » Thu May 26, 2022 4:42 pm

lol didnt know fixed them they are public now

Post by **cajuncustoms** » Thu May 26, 2022 4:46 pm

I think its the correct ecm , i wouldnt know why someone woulda swaped it , it has been uprev tuned and nats deleted , i dont know if its normal or its my Autel but i cant do a auto detect with the ecm and it doesnt do it on my 04 ether , i wonder of i can read vin with autel

Post by **cajuncustoms** » Thu May 26, 2022 4:47 pm

as for the wiring , the car sat for 2 years in my back yard , i stripped the parts for a 04 wreck that i had , then decided to build it , when i went to move it to the garage i noticed the dogs though the harness was a chew toy , so i bought a used harness off ebay for a 05 , when i got the ecm back from z1 and we put the harness in it fired right up.

Post by **VStar650CL** » Thu May 26, 2022 5:25 pm

cajuncustoms wrote: ↑
Thu May 26, 2022 4:37 pm
just noticed you were a nissan master tech lol , looks like i got the right guy

I don't put up a neon shingle about it, but yah. It's the automotive version of the "white belt when outside the dojo" thing, if you know anything about karate.

cajuncustoms wrote: ↑
Thu May 26, 2022 4:47 pm
as for the wiring , the car sat for 2 years in my back yard , i stripped the parts for a 04 wreck that i had , then decided to build it , when i went to move it to the garage i noticed the dogs though the harness was a chew toy , so i bought a used harness off ebay for a 05 , when i got the ecm back from z1 and we put the harness in it fired right up.

There should have been harness tags on both the original and the eBay harness, did the last 5 digits match? The fact that your TP1/TP2 readings are tracking together and not apart makes me think something is very screwed up. That might be your scanner and not the car, but it certainly complicates figuring out what's wrong.

cajuncustoms wrote: ↑
Thu May 26, 2022 4:47 pm
dont know if its normal or its my Autel but i cant do a auto detect with the ecm and it doesnt do it on my 04 ether , i wonder of i can read vin with autel

Lots of the stuff before about '05 doesn't store the VIN in the ECM, and even on models that do, it has to be programmed. So it's possible it either doesn't have storage or the repro guys wiped it out.

Post by **cajuncustoms** » Thu May 26, 2022 5:30 pm

oh man i hope i didnt screw up , this is the one i bought https://www.ebay.com/itm/194910771665
its for 03 - 04 this is a 05

Post by **cajuncustoms** » Thu May 26, 2022 5:31 pm

2003-2004 Nissan 350z DE Engine A/T Wiring Harness(2220)A.

Brand:
Nissan
Other Part Number:
1805-C6
Manufacturer Part Number:
1805-C6

Post by **cajuncustoms** » Thu May 26, 2022 5:33 pm

i still have the old harness i can check the tag on , but not sure on the installed harness if i can see it , where is it located

Post by **VStar650CL** » Thu May 26, 2022 5:36 pm

They don't move them around on the same model, but they're in different spots on different models. I don't recall where it it was on 350's. Find it on the old harness and it will be in the same spot on the new one.

Post by **cajuncustoms** » Thu May 26, 2022 5:40 pm

was googleing around and found this post that says "The 05 harness has these 6 prong connectors for 02sensors/ airfuel sensors"

https://my350z.com/forum/engine-drivetr ... rness.html

Post by **VStar650CL** » Thu May 26, 2022 6:21 pm

Nissan moved a lot of furniture around in the first years the 350 was out, and they show 7 different EGI harnesses just in the '05 model year. That's why I'm hammering on this, because I think there's a good chance your eBay harness may have some miswiring in it.

05 350z Timing / Engine Swap

05 350z Timing / Engine Swap

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