Montego Murph

iTrader: (1)

I did some searching and found some information, now I could use some help narrowing it down.

Another member posted this video. My 2001 i30 does exactly the same thing:
http://youtu.be/lRv4zLtZR9M

In his comments, the user explains that it was his crankshaft position sensor. Many other threads that I read while using the search function pointed to either one of the two crank position sensors, or the camshaft position sensor.

I am getting no CEL's, although it just occurred to me that I haven't run the scantool to see if there are any "dormant" codes. Will do that today

How do I determine which one of the three to replace?

foodmanry

iTrader: (15)

There are only two crankshaft position sensors. From what I have seen in my research of the same issue on this board is the sensor on the oil filter side of the engine is likely the culprit.

I have that sensor, I just need to get the time to replace it and see how it affects my starting problem. Hopefully this weekend I'll get the chance to do so.

Montego Murph

iTrader: (1)

Thanks -- I'm thinking about taking mine out tonight and testing it with my multimeter -- I think I saw something in the Service Manual showing how to do that.

Any ideas what causes this sensor to fail? Proximity to oiler or something?

My starting issue is getting worse. Used to be only occasionally, now every start is two 5-second cranks and then stumbling up to idle.

foodmanry

iTrader: (15)

Not sure...my 2k has over 215,000 miles on it and I have a pretty steady oil drip leak in that area. I'm sure the oil leak over time has fouled the sensor a bit.

foodmanry

iTrader: (15)

I finally got around to changing the crankshaft position sensor on the left side of the engine (front side, depends on how you see it). It is the one closest to the oil filter. I'm kicking myself I didn't do this sooner because it only took about 20 minutes.

Look at the attached picture. You can see the oil/dirt buildup on the sensor which is probably the reason I was having start issues. As soon as I replaced it the Max fired right up.

I'll see how it goes over the next week or so, but I think considering the condition of the original sensor this was my problem. If I have further issues I'll report.

No news is good news...

Montego Murph

iTrader: (1)

I wonder.. Do you think all it needed was a good cleaning? Just for kicks I'm going to pull mine as soon as I have time and give it a cleaning and see if that helps at all.

I don't expect it to, but for 30 minutes of entertainment and wrenching time, why not.

foodmanry

iTrader: (15)

Quite possibly...I had already bought the new sensor so I went ahead and changed it out.

ImStricken

where did you buy it and how much?

BeSeenWithGreen

iTrader: (4)

I found the sensor near the tranny but, I cannot locate the sensor near the pulley. from the pics I seen online it should be right below the pulley. I have 2 threaded bolt holes under there but no sensor? Can anyone please post a pic or detailed expenation where the sensor is located? It is possible that I only have one sensor for some reason? Its an 02 6spd max btw. Thanks, Greg.

Montego Murph

iTrader: (1)

Green,

If I understand things correctly, the 3.5 engine has two camshaft sensors and one crankshaft sensor, and the 3.0 engine has two crank sensors and one cam.

If you did have one there though, it would look a lot like this:

BeSeenWithGreen

iTrader: (4)

Thank you...thats exactly where i was looking and only fouad the holes for 2 bolts. So you're saying that my car only came with one crank sensor? Meaning there isnt another place where the second sensor is located? Thanks again.

Montego Murph

iTrader: (1)

I'm hoping someone better versed with the 3.5 will jump in, but I'm reasonably sure that I'm correct.

Two things come to mind though -- First, if a sensor was missing, you'd be having some sort of running issues or a check engine light. Second, did you happen to notice a wiring harness hanging there without anything to plug into? Also, near those two bolt holes you mentioned, did you see a hole going into the engine block, maybe about the size of a nickel where a sensor should reach through?

BeSeenWithGreen

iTrader: (4)

That would be a no to all the above...guess I just have one sensor. That is a bit strange but unless someone has a reasonable explantion I'm just left guessing here. So I ran the codes and crank position sensor was tripped so I guess I'll just replace theonly one I have and see what happens. Thanks for the replies.

DennisMik

iTrader: (2)

You only have the one crankshaft sensor, CKPS (POS), sensing the teeth on the flywheel. The 3.0 engine has 2 sensors, CKPS (REF) & CKPS (POS). Nissan went to one sensor with the 3.5 engine.

The FSM has this info in it. Click the link and download one if you don't have one.

http://boredmder.com/FSMs/Nissan

The file named fwd.pdf is the "cover page" file, the starting point.
The file named idx.pdf is the alphabetical index file.

BeSeenWithGreen

iTrader: (4)

Excellent! Thank you for the info