Hi all,

I've had a little hesitation around 24-2800 rpm and no other patterns of when it will do it...I tested lots of things to narrow things down. Error codes say 41, which is for fuel temperature sensor. Upon inspection, I noticed part of the wire to the senor with a cut casing with wires exposed and a little damaged. And the connector to the sensor was also damaged. Pulled it off and inside the connector was a lot of oxidation/corrosion. I tried to clean the corrosion as best I could and the car seems like it hesitates less now.

My questions are:

1. The manual says to test the resistance over the sensor, which I tried how the manual shows and I don't get a reading. What kind of reading should I get? The manual doesn't say. Looks like the sensor is bad? I read a forum post where someone said a bad sensor would make the car not run. What if I unplugged the sensor entirely, to test the difference in hesitation (to see if the sensor is even working), will it mess anything else up? I doubt it, but just asking.
   
2. Also, I may replace the connector/wire regardless. The connector and wire are attached to the E.F.I harness according to the manual. I've spliced wires before so I can do this, but I'm not sure what's in the connector or is it just a simple connector I can replace with a pretty generic auto parts one? It appears I can but just asking, I've never replaced a connector like this before.
   
3. OR....If I leave the connector, what's a good way to clean out the connector of corrosion? I've tried some electronics cleaner and a wire brush, but it still looks a little corroded. Any better cleaner and anything better than a brush?

Also, here's another post I found with a similar issue and code 41, and they replaced the fuel regulator:
https://www.zdriver.com/forums/300zx...-sensor-15164/

 

Update

I tried removing the wire connected to the sensor and it ran the same. So it wasn't working to begin with, or something else isn't working and it doesn't make much of a difference.

After plugging it back in, the wire broke off near the connector. I pulled it off and cracked open the connector casing. It was super brittle/corroded and the wire just fell out.

I replaced the connector with a temporary one from the auto parts store. Not ideal, especially with now a shorter wire The casing for the original connector was thick, I'm guessing because it is so close to the engine? I noticed the exact same connector (under the casing) on my new distributor grounding wire, so someone still makes at least the connector.

However, the car still hesitates. So either my temp fix isn't good (I don't think so), or the sensor is bad.

Questions now:

1) I see the sensor listed to buy, but the manual says replace the regulator too. Anyone have experience with that and why?
2) Should I look harder for a connector with a thick casing or just wrap it up in heat resistant material?
3) Where to get a connector if there is one? I'm probably going to search nissan parts. Over the phone the dealership said they didn't sell things like that. 3)