Please Help With Engine Stall/Idle Problem

[Ciphernet360]

Making progress on fast idle.

Taking 'shawn110975' advice from an earlier post, in addition to all of my changes I have to say I have made some progress.

I had purchased a new Fast Idle Valve and put this on, thinking this would solve the issue. After some investigation and continuous Vacuum leak hunting, I thought that I would try this experiment on the old Fast Idle Valve.

My car now no longer "hunts" for an idle, but does still idle at about 1000 ro 1250 rpm -- but the progress is that it no longer "hunts" for an idle.

Using my older Fast Idle valve I unscrewed the top cap, and screwed in the white plastic ring inside all the way down to see if this was a cause of my small vacuum leak.

From an above post from Briank - I have since installed a new fuel filter and a Fuel PSI gauge from SOS and am happy to say that the the PSI sits at 40 psi. Right in the middle of lower and upper tolerance.

I am still going to move forward with the refurbed throttle body and reset TPS.

I did notice that the white plastic ring on my NEW Fast Idle valve is turned out 2.5 turns from bottom.

I'm just wondering that if this ring (according to other post) has caused other people's fast (high) idle, is this unit set from the factory correctly? Don't know - but I wanted to share this with everyone to let people know that some progress has been made and your advice has truly helped.

Onward we go...:smile:

 

[Ciphernet360]

Engine Stall/Idle Problem Solved

After months of hunting, searching and learning I have solved the idle hunting issue with part # 37870-PJ7-003 Sensor Assy (TW5).

If you have this same issue, please check and/or replace both Coolant sensors.

Thank you to all for your help over the months with your feedback. I have read and acted upon all feedback and this was the final things that helped and solved my issue.

Thanks again Prime members / posters.:smile:

 

[usafdarkhorse]

Congrats! Feels good right?

 

[Ciphernet360]

Yes - it feels real good, especially knowing that I was willing and able to work on my own car, do the reading, do the learning, get dirty, make mistakes and finally work towards a solution.

And it feels good having a resource like the people on prime.:smile:

 

[Daedalus]

It should also feel good to be able to rev it beyond 7000RPMs and to actually have the VTEC solenoid engage again.

 

[ryan1926]

Re: Engine Stall/Idle Problem Solved

After months of hunting, searching and learning I have solved the idle hunting issue with part # 37870-PJ7-003 Sensor Assy (TW5).

If you have this same issue, please check and/or replace both Coolant sensors.

Thank you to all for your help over the months with your feedback. I have read and acted upon all feedback and this was the final things that helped and solved my issue.

Thanks again Prime members / posters.:smile:

Would you happen to know the part # for the second sensor you replaced?

 

[Ciphernet360]

Re: Engine Stall/Idle Problem Solved

Would you happen to know the part # for the second sensor you replaced?

Via PartsGeek.com
Item # 5920-05039864
Four Seasons Engine Coolant Temperature Sensor

http://www.partsgeek.com/gbproducts/DC/5920-05039864.html?utm_source=google&utm_medium=ff&utm_term=1991-1999+Acura+NSX+Water+Temperature+Sensor+Four+Seasons+91-99+Acura+Water+Temperature+Sensor&utm_content=DN&utm_campaign=PartsGeek+Google+Base

 

[Daedalus]

I think you can get the OEM one for $24. Or is that a different sensor?

 

[ryan1926]

I was able to buy the OEM 37870-PJ7-003 part. However, I wanted to verify the part # of the other sensor. Thanks!

 

[Daedalus]

The TW sensor is the only one that affects engine performance. If your coolant gauge works then leave that one alone.

 

[lazyboyz69]

I purchased this part 37870-PJ7-003 but I have no idea where it goes? Is page II-49?

 

[Kaz-kzukNA1]

These photos should help you in understanding the 3 sensors measuring the coolant temperature for the different purpose on our NSX.
The one you mentioned is the TW sensor and it is used for the ECU EFI control.

The brass one is the Temperature sender unit and it is used for the temperature gauge on the dash.

The one on the thermostat cover is the Rad fan control sensor and as its name suggests, it decides the mode/speed of the radiator fan, etc in conjunction with the Fan Control Unit.


Kaz

 

[lazyboyz69]

THANK YOU Kaz-kzukNA1 !!!!