Pelican Parts Forums

Pelican Parts Forums (http://forums.pelicanparts.com/)
-   Porsche 911 Technical Forum (http://forums.pelicanparts.com/porsche-911-technical-forum/)
-   -   3.2 carrera runs poor with 02 sensor plugged in (http://forums.pelicanparts.com/porsche-911-technical-forum/958639-3-2-carrera-runs-poor-02-sensor-plugged.html)

911 sc 06-01-2017 09:41 AM

3.2 carrera runs poor with 02 sensor plugged in
 
I replaced my old 02 sensor with a factory new one and my car still runs just average feels low on power and sluggish acceleration but runs smoothly and idles at 880. when I unplug the sensor it runs great with way more power at mid and high rpm with a slightly high idle at 1k and smells rich.

Suggestions?
Should I look at my cht sensor or reference sensor?
Thank you

Trakrat 06-01-2017 01:29 PM

My first guess would be an issue with your fuel delivery...

steely 06-01-2017 02:36 PM

This is completely unscientific, but my car ran so poorly when I bought it, that the PO had disconnected the O2 sensor b/c it ran better with out it.

I later found that I had a an ICV issue and a lot of little vacuum leaks. Once I resolved them, it ran better with the O2 sensor. Your ICV may be ok, but you might have un-metered air getting in.

Any difference in performance between when cold and when warmed up?

The ref sensor is only used during start up, so I think you can eliminate that.
A faulty CHT can mess with you tho'.

911 sc 06-01-2017 04:10 PM

This is completely unscientific, but my car ran so poorly when I bought it, that the PO had disconnected the O2 sensor b/c it ran better with out it.

I later found that I had a an ICV issue and a lot of little vacuum leaks. Once I resolved them, it ran better with the O2 sensor. Your ICV may be ok, but you might have un-metered air getting in.

*-Don't think I have any vacuum leaks I have checked it twice.

Any difference in performance between when cold and when warmed up?
*-yes much better when hot!

The ref sensor is only used during start up, so I think you can eliminate that.
A faulty CHT can mess with you tho'.[/QUOTE]
*- I was thinking this I did order a new one so we will see next week.

stlrj 06-01-2017 04:44 PM

Has your air flow meter been tampered?

911 sc 06-01-2017 04:59 PM

I don't think so, the plug is still in place.

john walker's workshop 06-01-2017 05:15 PM

Pull the hose off the fuel pressure regulator and see if gas runs out.

911 sc 06-01-2017 05:27 PM

Which hose on the regulator

stlrj 06-01-2017 05:32 PM

Quote:

Originally Posted by 911 sc (Post 9610164)
Which hose on the regulator

I think he's referring to the small vacuum line that's plugged in the middle of the regulator.

Canada Kev 06-01-2017 06:31 PM

Would gas run out of the vacuum line? JW said to remove the hose to see if gas runs out.

911 sc 06-01-2017 07:37 PM

Checked , No gas came out of the vacuum line

proporsche 06-01-2017 10:56 PM

hi 911sc..my 1st think would be you to remove the air flow meter ,then remove the plugs and have the C/0 checked...your car is running too lean....

Ivan

911 sc 06-02-2017 10:40 AM

Quote:

Originally Posted by proporsche (Post 9610467)
hi 911sc..my 1st think would be you to remove the air flow meter ,then remove the plugs and have the C/0 checked...your car is running too lean....

Ivan

How do you open the meter? Looks like it's just glued in place ?

proporsche 06-02-2017 11:50 AM

No you do open the unit.
Remove it from the car.Remove the el.plug there are 3 nuts which holdss it in place.then big hose clamp on top.On the right side is a breather hose bracket where you remove 2 phillips head screws.(also remove the filter with the cover 1st.)
Behind the filter is the 3rd nut to hold it in place.Once you have it out you drill 2 mini holes into the alu.plug and remove it by pulling it out with needle nose pliers.
http://img.pccreation.net/photos/201706022148518238.JPG

Here is the alu plug.
http://img.pccreation.net/photos/201706022150064219.JPG
the plug comes out here do not bother to put it back no need to.

Ivan

http://img.pccreation.net/photos/201706022151273700.JPG

911 sc 06-09-2017 11:17 AM

Final report , it was a bad cht sensor old crusty single wire. Possibly a bad spark plug wire contributed to the problem. I got a new set of beru wires and she is back on the road. Thanks

steely 06-09-2017 11:38 AM

cool!


All times are GMT -8. The time now is 03:51 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website


DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.