icer5160

iTrader: (4)

These do NOT look like OEM Nissan parts. The dead give away is, there are no pictures of the OEM Nissan part sticker or packaging material. A reputable seller would show this detail. These look like cheap aftermarket copies. The price is another dead give away. Three sensors for $30.00 is to good to be true.

I wouldn't trust any sensors/parts from eBay (yes some exceptions such as *used* parts from a wrecker/dismantler). Otherwise, most new parts listings claiming to be OEM are counterfeits. Buy this kind of stuff from a reputable source, stay away from Amazon and Ebay for sensors! Also note, this extends to things like spark plugs, filters, and other items that claim to be OEM. Just about everything is being counterfeited these days. I have seen fake spark plugs, oil filters, pcv valves, and sensors. Some are disguised better than others. The fakes wind up on places like Amazon or Ebay because they don't have the man power or expertise to inspect every item they sell for legitimacy.
-Icer

iideadeyeii

iTrader: (6)

Why is no one addressing that this vehicle mysteriously has a bad coil and two injectors go bad at the same time. Coils can go bad(I've had 3 of my oem go in the 145-150k range) but injectors also being clogged also at the same time right after you bought the car is is just impossible.

If the injectors are clogged the plugs should be white because the engine is leaning out; It's very easy to see, but I would bet money that this isn't the issue.

Aeneas137

or in the case of eBay, they don't want to know if it's fraud or fake. as long as they get their damn fees. anyone still selling on eBay is a masochist.
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icer5160

iTrader: (4)

Hey Deadeye,

I have my suspicions as well. It's not impossible for this to happen (but extremely rare/odd to say the least), but the real question is, what events lead to this situation. This is why I recommended replacing the cam sensors, this problem started with misfires. But OP did have a shop look at the car and declare the injectors were clogged/bad after also replacing two coils. How the shop determined this, I don't know. Sounds like OP also ran a power balance test. It could be a faulty harness for the injectors, or possibly that the injectors were replaced by the previous owner with cheap aftermarket units. I'm a big fan of test and verify before shooting the parts canon. Testing injectors can be tricky though.

Inspecting the spark plugs should also be done. Make sure they are OEM spec, not damaged, and as Deadeye recommended, look for signs of running lean.
Cheers!
-Icer

Aeneas137

shotgunning serviceable parts into the car is not a bad thing at 150K. sure, it's not a diagnosis approach but it's not going to hurt and if some of that stuff has never been replaced?

iideadeyeii

iTrader: (6)

Sure, but you can also replace all bushings, fuel/brake lines, rebuild all the calipers, replace rotors, piston rings, bearings, valve guide seals, all gaskets while he's in there and still have a misfiring engine. It's ignorant

icer5160

iTrader: (4)

OP said the car has less than 60k mi. That's why this is weird. If it were 150k+, I would say money well spent. But with 53k mi, none of these components should be failing.
-Icer

geosar

2004 350Z touring convertible. 78000 miles. I am in the process of repairing a cylinder #2 misfire which I originally thought was a spark plug seal leak. Upon removing the plenum the cylinder #2 fuel injector wire was chew apart.

While I am repairing this damage and replacing the valve covers with the Z1 model, should I pay any attention to the fuel injectors? I have had the car 10 years and probably have not put 1000 miles on it regrettably but I enjoy the car.

Fuel injectors are expensive at Z1 and you can get 6 for the price of one on line at other dealers. With my minimal driving would I be foolish to buy the cheaper fuel injectors or should I just leave them alone since they are not giving me trouble. Or should I go halfway and replace the seals on the injectors I have.

I know nothing about the cam and shaft sensors but apparently they are within reach as well.

Thank you

Aeneas137

I recommend replacing all of the sensors on these older cars because they do fail and why wait for them to fail when they definitely will fail? it's an age thing, not just mileage. camshaft sensor failed on mine at the track last year and ruined a fun track day. these things aren't expensive. but a track day is. a failed cam sensor won't require a tow so you can just wait for a to fail I suppose. but since it's not mileage related, you could consider this required age services. O2 sensors and crank sensor are less fragile I think, less often failing, but O2 sensors will surprise you with a failed smog check.

geosar

Thank you. I may replace both while I am there.

What about the fuel injectors? I have no indication they are bad except for the chewed #2 cylinder fuel injector plug wire. Just leave them alone and use fuel injector cleaner in the fuel?

Thank you

George
Arizona