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Search took 0.11 seconds. Search: Posts Made By: AndrewCologne
Forum: Porsche 911 Technical Forum 12-09-2025, 01:30 AM
Replies: 9
Views: 306
Posted By AndrewCologne
The well-known ported vacuum gives an ignition...

The well-known ported vacuum gives an ignition advance only at very low load, when the throttle is slightly open. This makes engine operation smoother while cruising or at higher RPMs with low load,...
Forum: Porsche 911 Technical Forum 11-18-2025, 07:48 AM
Replies: 68
Views: 2,155
Posted By AndrewCologne
That’s normal, since –with the same initial CO...

That’s normal, since –with the same initial CO setting kept– a warmer control pressure from the WUR makes the mixture result leaner, and therefore the duty cycle will rise to compensate this.
But...
Forum: Porsche 911 Technical Forum 11-14-2025, 11:47 PM
Replies: 68
Views: 2,155
Posted By AndrewCologne
Please check the instructions in the link: ...

Please check the instructions in the link:
https://nineelevenheaven.wordpress.com/adjusting-the-warm-up-regulator/

Moving the small pin adjusts the cold control pressure, while moving the large...
Forum: Porsche 911 Technical Forum 11-14-2025, 03:34 PM
Replies: 68
Views: 2,155
Posted By AndrewCologne
@massmike Here you can see what a poor lambda...

@massmike
Here you can see what a poor lambda reading looks like and what Dave and I are referring to:

<iframe title="vimeo-player" src="https://player.vimeo.com/video/1137071258?h=693de3067e"...
Forum: Porsche 911 Technical Forum 11-14-2025, 01:20 PM
Replies: 68
Views: 2,155
Posted By AndrewCologne
Nope, values are not ok. You should first have...

Nope, values are not ok.
You should first have your WUR checked and readjusted. Ask Tony here in the forum — he’s your man.
Here are the correct pressures mentioned:...
Forum: Porsche 911 Technical Forum 11-14-2025, 01:05 PM
Replies: 68
Views: 2,155
Posted By AndrewCologne
…lets the signal provide less voltage to the ECU,...

…lets the signal provide less voltage to the ECU, and the signal’s amplitude will be lower. The ECU interprets this as a too lean mixture even if it's ok and increases the duty cycle.

It’s ok for...
Forum: Porsche 911 Technical Forum 11-14-2025, 09:10 AM
Replies: 20
Views: 749
Posted By AndrewCologne
He should get one, as these are quite affordable,...

He should get one, as these are quite affordable, or have a service garage perform the pressure checks. I think that’s a must, at least if it has never been done on that car.
If it’s running...
Forum: Porsche 911 Technical Forum 11-14-2025, 06:44 AM
Replies: 20
Views: 749
Posted By AndrewCologne
Ok, then also check the cold (and warm) control...

Ok, then also check the cold (and warm) control pressure of your WUR to make sure they’re within spec.

It would be interesting to see a video of the engine when it’s warm and idling smoothly, to...
Forum: Porsche 911 Technical Forum 11-14-2025, 03:52 AM
Replies: 20
Views: 749
Posted By AndrewCologne
I’m here with ant7 and Ivan. The more...

I’m here with ant7 and Ivan.
The more information Ben provides, the better the diagnosis will be.
A good approach would be to get the engine running properly first. To me, it sounds like it’s...
Forum: Porsche 911 Technical Forum 11-13-2025, 01:26 AM
Replies: 68
Views: 2,155
Posted By AndrewCologne
IF the ECU is not at fault, then the cause of the...

IF the ECU is not at fault, then the cause of the surging is actually quite simple: regardless of the lambda control in your case the CIS system obviously does not provide a stable mixture or AFR...
Forum: Porsche 911 Technical Forum 11-04-2025, 07:26 AM
Replies: 68
Views: 2,155
Posted By AndrewCologne
The sensor’s heating element draws a lot of...

The sensor’s heating element draws a lot of current, so as I mentioned, use the switched power from the fuse panel on the left side.

Or use the current from the wire in the pic above from the fuel...
Forum: Porsche 911 Technical Forum 11-03-2025, 02:24 PM
Replies: 68
Views: 2,155
Posted By AndrewCologne
For the three-wire sensor, you should use power...

For the three-wire sensor, you should use power from the fuse box — the circuit that’s live when the key is on.
You don’t need a Porsche branded sensor; just use the one directly from Bosch: 0 258...
Forum: Porsche 911 Technical Forum 11-02-2025, 04:46 AM
Replies: 68
Views: 2,155
Posted By AndrewCologne
Follow my recommendation above: ...

Follow my recommendation above:




With an initial CO setting where idling results in a 50–55% duty cycle, it should normally fluctuate around 38–45% while driving — but not 46–60%, as that...
Forum: Porsche 911 Technical Forum 10-22-2025, 03:19 AM
Replies: 68
Views: 2,155
Posted By AndrewCologne
No – the mixture regulation of the lambda control...

No – the mixture regulation of the lambda control is done only through the frequency valve.
A duty cycle of 100% means the valve is fully open, resulting in lower pressure in the “lower” chambers of...
Forum: Porsche 911 Technical Forum 10-22-2025, 12:20 AM
Replies: 68
Views: 2,155
Posted By AndrewCologne
It seems the initial setup of your system is off...

It seems the initial setup of your system is off — follow the instructions here:
https://nineelevenheaven.wordpress.com/the-911-sc-3-0-engine-with-catalyst-and-lambda-control/
Don’t just adjust the...
Forum: Porsche 911 Technical Forum 10-20-2025, 02:56 PM
Replies: 68
Views: 2,155
Posted By AndrewCologne
again ,no reason not to get things working the...

again ,no reason not to get things working the way they were engineered — especially since that’s what was clearly asked for above. Amen.
Forum: Porsche 911 Technical Forum 10-20-2025, 01:45 PM
Replies: 68
Views: 2,155
Posted By AndrewCologne
Or, in a nutshell, for testing purposes just...

Or, in a nutshell, for testing purposes just unplug the acceleration unit, and no 75% duty-cycle enrichment will occur when the 15° throttle switch position is triggered.
Forum: Porsche 911 Technical Forum 10-20-2025, 01:30 PM
Replies: 68
Views: 2,155
Posted By AndrewCologne
- bad OX sensor - bad ECU - bad initial CO...

- bad OX sensor
- bad ECU
- bad initial CO setup
- false air
- ... etc


yes, ... faster sensor initializing and better stable sensor signal output
Forum: Porsche 911 Technical Forum 10-19-2025, 02:09 AM
Replies: 68
Views: 2,155
Posted By AndrewCologne
That’s because everything is installed correctly...

That’s because everything is installed correctly and apparently set up properly, so everything runs perfectly.

There are cases where a resulting lambda/AFR value oscillates back and forth with a...
Forum: Off Topic Discussions 10-14-2025, 02:54 PM
Replies: 62
Views: 3,378
Posted By AndrewCologne
In Germany, regular DHL service still ships to...

In Germany, regular DHL service still ships to the U.S., but only for private gift shipments valued under $100. Shipping costs for typical small parcels are around €50.
Everything else must be sent...
Forum: Porsche 911 Technical Forum 09-27-2025, 12:38 AM
Replies: 18
Views: 609
Posted By AndrewCologne
Just don’t let it shrink all the way down until...

Just don’t let it shrink all the way down until it seals everything.
Forum: Porsche 911 Technical Forum 09-26-2025, 01:21 PM
Replies: 18
Views: 609
Posted By AndrewCologne
Chat GPT gives a perfect answer and it’s English...

Chat GPT gives a perfect answer and it’s English is far better than mine :-) :

Question:
Why should the wires of an ox sensor of a car being crimped and not being soldered? Something to do with...
Forum: Porsche 911 Technical Forum 09-25-2025, 02:07 PM
Replies: 18
Views: 609
Posted By AndrewCologne
Porsche is just a re seller of such parts, ... at...

Porsche is just a re seller of such parts, ... at the end most of the providers and selling brands get those Sensors from the same Supplier/manufacturer.
Forum: Porsche 911 Technical Forum 09-24-2025, 01:09 PM
Replies: 18
Views: 609
Posted By AndrewCologne
I see we just have different interpretations on...

I see we just have different interpretations on what means „running perfect“, but as you said we leave it at that and … have a beer. :-)
Forum: Porsche 911 Technical Forum 09-24-2025, 11:46 AM
Replies: 18
Views: 609
Posted By AndrewCologne
No - I said clearly with using the ECU running...

No - I said clearly with using the ECU running flawlessly he won’t loose any performce. You simply interprete my words in another way.

And with the lambda system deactivated and running in open...
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