Let me start with saying Thanks to you all for helping me deal with rough idle issue
I am still trying to make my Maxi perfect and its getting better day by day.

I am left with last few issues to deal with and they are baffling even old pros and nissan dealer mechanics anyway here are the syndroms

1) When I take left or right turn, engine hesitates and become rough, revs, and car looses power, if i take my foot off from gas and give it gas again after turn is complete it works normally, no hesitation, smooth

2) Morning idle is 900rpm, when i take my Park break off Idle jumps to 1300 rpm. This happens only when engine is cold, for warm engines park break doesn't matter.

3) When I put transmission from P to D car gets a big jerk, but it happens only when engine is cold, for fully warm engines no problem.

4) I forgot this earlier, In stop & go driving, every time car shift in & out of gear with huge jerk.

I had complete stage0 tuneup recenly so we can safely rule out spark plug, fuel filter etc

 

1. does it do this when the car is just sitting still? or only when moving. Put it in park and turn the wheel. Does it bog down when you do this? I dunno much more, but check that your Power steering fluid reservoir is full.

2. It is normal to idle high when it is cold. It should slow down to around 700 rpm once the engine warms up.

3. Have you checked your tranny fluid. Maybe it needs replacing or is low. If you can't remember when it was changed or don't know, you should change it. It could be something worse than tranny fluid... which is bad...

4. Same as 3.

 

If you turn on the AC while idle on a warmed up engine does your RPM drop also?

 

Shooting in the dark but problem 1 sounds like maybe power steering, but it could be transmission, everything else sounds like transmission. When engine is cold it is reving higher anyway so from p to d engine cold it will be a more noticeable shift than when warm.

 

Like everyone is saying, problem 1. sounds like the power steering. Check the fluid and the belt. Not sure about 2. 3. sounds pretty normal to me. 4. my car does that too, especially when shifting into 2nd(hopefully just need some cleaning on the ground wires/contacts).

 

#1 Happens only while driving. power steering fluid is good, infact I cleaned power steering reservoir with transtune and then replace some power steering fluid

#2 I don't understand why idle jumps when i engage/dis engage parking break.

#3 just my guess but can a bad transmission mount cause jerks in shifting

 

Long shot here. Did you spill some power steering/transmission fluid on the belts while doing this and may be forgot to clean it?

 

No, I used a big size dropper to remove oil from ps tank, not a single drop came off. But now that you mention it, I had belts changed, which might be loose. Can loose steering belt cause this behavior?

 

I had those symptoms when I had a bad TPS.

 

i say transmission...it can make a lot of things happen