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Can someone tell me where that is located on the VQ? It's way too cold to sit outside and search for it? I have heard that we can fix the problem by putting a shielded wire on the cable. Anyone have any thoughts on it?
 

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Stupid idle issue, I think this effects ALL 350Z. Your idle should jump up and down a little bit instead of absolutely solid. You should see it moving up and down slightly or a lot. Nissan will tell you its normal, but it is not normal for sure. They are just trying to avoid the problem, being typical a$$holes
 

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Explanation of the issue posted by qg_626:

"There is some speculation, and apparently some testing by APS has confirmed this as well....that there is some kind of interference or anamoly with our crank angle sensor wire. Essentially, there is some noise in the signal that goes to the ECU, and under certain circumstances, this can generate a false or muddy crank angle input to the ECU. Obvisouly, if this happens, there is a chance that the coils may fire before the pistons are at TDC, and could contribute to detonation/preignition. Peter has also described this as "scattered ignition timing". It is something that occurs only under certain conditions, and only on certain cars. Some cars exhibit no anomolies...others do.

But APS felt it was important enough to include a new shielded crank angle sensor wire in their kit. You can see this on their website.

So...just to be safe, it would be HIGHLY ADVISIBLE for everyone with the Greddy and PE kits to immediately swap their unshielded crank angle sensor wire with a new shield wire. I would hate to see these new forged motors start blowing up due to this potential problem."
 

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Do you think it would be a safe idea to do on an N/A...you know, just to prevent detonation/engine wear?
 

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[/quote]

It's certainly safe for N/A motors and a good idea if you're running 91 octane gasoline.
 

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KShep, I am reading through the entire thread right now on the evil board, and this seems like the simplest solution to blown FI motors...do you think the bearings are off the hook now as the culprit? Also, have you already bought the wires from Charles?
 

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[/quote]

There are too many different variables to say this wire is a fix for every application where F/I is introduced to the VQ...but if it saves just one engine it's worth the investment.

I am in on the GB...wires not yet ready.
 

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[/quote]

How are they providing a new shielded sensor wire?
I have a new factory harness and also checked under the car yesterday when changing my oil and the crank angle sensor harness is an integral part of the overall engine harness. You can't just unplug both ends and replace it.

Does the APS cable just plug into the end of the factory harness and then into the sensor? If it does this how is it providing shielding when the original wires are still running through the factory harness?

Does anyone have a picture of this new cable?
 

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Z327,

Are you sure you were looking at the crank angle sensor and not the oil sending unit? The only reason I ask is that I thought the crank angle sensor is back by the tranny (flywheel in particular). I just don't think I would notice it when changing my oil. However, I would notice the oil sending unit, which is up front.

Just my $0.02, but I certainly do not know for certain.
 

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[/quote]

Its by the transmission housing where it attaches to the back of the engine (opposite side from the oil filter).
I even located the sensor and checked the manual to make sure I had it located.
I also looked at a sensor at the dealership before I put my car in the air for the oil change. Its an oblong connector with three pins.
 

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Thats the one. I was just making sure. Thanks for the great picture though.

If you want to see the shielded sensor wire that APS offers with their TT kit, check out the link below. From the looks of it, it has a connector at both ends. However, the connector at the ECU side has the entire ECU harness plug so that they can also attach their piggy back computer. It seems as though you would just run the gray wire to the CA sensor outside of the factory loom.

http://www.airpowersystems.com/350z/ecu/crank_signal.htm
 

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[/quote]

Thanks that makes more sense. Its a lot more than a simple add on cable.
 
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