Plug look like I'm Running lean?

[911 sc]

New ngk bp6 1,000miles ago
What do you think, lean?

[Trackrash]

Lean is a relative term. If that came out of my car, I would put larger jets in my carbs.

Most FI systems with smog controls will be relatively lean. What car did that come out of?

I guess you could run your car on the dyno and make adjustments depending on your results.

[911 sc]

3.2 carrera

[T77911S]

how many miles on the plug

[Tippy]

Looks perfect. Yours is clearly running correctly at stoch.

The true test would be to run it to redline in all the gears, and immediately shut down, and then read plugs.

That will tell if lean.

Looks like idle and part throttle AFR's are exactly where they should be.

[RSTarga]

With todays unleaded fuels, you can't tell much from plugs anymore.

[911 sc]

Ok thanks guys thoes plugs have 1k miles on them ,

I'm having some high rpm running issues. Loss of power above 4.5 k rpm. Car feels like it's not getting gas ? Maybe "feels" lean?

I've recently replaced the following.
Valve adjustment
Cht
2 reference sensors
O2 sensor
Plugs
Wires
Cap&rotor
Fuel filter
Pre muffler & sport muffler
Checked my tracks on afm
Fuel pressure is 30psi at idle 37 with fpr disconnect.
Checked for vac leak none , I'm getting a nice drop in rpm when I open the oil cap.

Any suggestions ?
Thank you

[Tippy]

Check continuity of "WOT switch".

Sounds like your WOT map in the DME is not getting triggered. This will cause your symptoms.

It's where a traditional TPS is located on the throttlebody in black.

[911 sc]

Yes checked wot switch with multimeter it's good and is engaging at 3/4 throttle .

[Steve@Rennsport]

A bone-white insulator without any coloration suggests a very lean mixture, however one needs to know whether the ignition was cut at higher RPM or simply removed after idling for a few minutes. There is a very specific procedure for performing a plug cut to accurately read spark plugs.

I'd strongly recommend a chassis dyno session to confirm AFR's and whether its making proper HP to the wheels or not.

[911 sc]

Thanks Steve ,

I just cruised home from work at 60 mph no high rpm and parked it.
I have no access to a dyno. do I have any other options?

[darrin]

Originally Posted by 911 sc

Thanks Steve ,

I just cruised home from work at 60 mph no high rpm and parked it.
I have no access to a dyno. do I have any other options?

seems you're looking to see what a wideband oxygensensor would show your mixture to be across rev ranges -- in other words whether it's leaning way out as your rpms increase. Easy to do on a dyno, but also can be done by replacing the standard oxygensensor with a wide band one and adding a logger yourself.

[Trackrash]

An air fuel gauge is an easy install.

https://www.google.com/search?q=aem+air+fuel+gauge&ie=utf-8&oe=utf-8

[Trackrash]

[smokintr6]

What do the other 5 plugs look like? That one almost looks like it was in a hole that wasn't running. certainly doesn't look like 1k miles

[911 sc]

Originally Posted by smokintr6

What do the other 5 plugs look like? That one almost looks like it was in a hole that wasn't running. certainly doesn't look like 1k miles

I know that's what I was thinking , so I pulled all six and they are the same !

[smokintr6]

weird... I'd check with the wide band next. It sure seems like you've covered most of the bases

[T77911S]

have you checked the pins at the DME connector for the throttle switch.
put the meter on those pins the go WOT.

a BP6 plug and you most likely shut it down at idle, I don't think this is an indication of your problem. if it is then you are lean at idle too. try a BP7, not that that will fix your issue.
(I don't know what most run in this car).

really sounds like the DME is not going richer when it should. throttle switch problem as in the DME is being told to go richer or DME.
maybe FP not delivering the required volume of fuel.

[Joe Bob]

Put it on tail pipe sniffer, answer all your q's.....

[911 sc]

It's odd running lean with 02 plugged in and rich unplugged ??