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Showing results 1 to 24 of 24
Search took 0.01 seconds. Search: Posts Made By: massmike
Forum: Porsche 911 Technical Forum 11-17-2025, 01:25 PM
Replies: 10
Views: 317
Posted By massmike
If the nut starts to thread in you could add some...

If the nut starts to thread in you could add some valve lapping compound to the threads and work the nut back and forth multiple times until it threads in. This will take some patients.
Forum: Porsche 911 Technical Forum 11-17-2025, 07:47 AM
Replies: 68
Views: 2,170
Posted By massmike
So Tony has been through this WUR in August of...

So Tony has been through this WUR in August of this year. He listed a warm control pressure of 52psi. I am wondering if my cheap gauge set is not 100% accurate, since I am reading 49-50Psi.

Also...
Forum: Porsche 911 Technical Forum 11-14-2025, 11:22 AM
Replies: 68
Views: 2,170
Posted By massmike
It is quickly getting to the end of driving...

It is quickly getting to the end of driving season here in Massachusetts, do you think its worth having the ECU send out for bench testing while the car sits over the winter? I am not 100% ready to...
Forum: Porsche 911 Technical Forum 11-14-2025, 11:14 AM
Replies: 68
Views: 2,170
Posted By massmike
Another update. I took the car for a 20ish mile...

Another update. I took the car for a 20ish mile ride to get some heat in the engine, then checked pressures. Fuel pump pressure was measured at 67psi and hot control pressure at 49psi. Both are on...
Forum: Porsche 911 Technical Forum 11-13-2025, 11:43 AM
Replies: 68
Views: 2,170
Posted By massmike
About two months ago I had sent the WUR to Tony...

About two months ago I had sent the WUR to Tony (on here) to have him go through it and make sure it was up to spec. The only issue he noted was the speed from cold control pressure to warm was quite...
Forum: Porsche 911 Technical Forum 11-12-2025, 01:09 PM
Replies: 68
Views: 2,170
Posted By massmike
Another update... I was able to add a 3 wire O2...

Another update... I was able to add a 3 wire O2 sensor to the car. I used a Bosch 13918 which was powered with a relay. I used a positive signal from the unused thermo valve plug that I mentioned...
Forum: Porsche 911 Technical Forum 11-04-2025, 06:58 AM
Replies: 68
Views: 2,170
Posted By massmike
I did some testing and best I can tell this plug...

I did some testing and best I can tell this plug I found is getting power from Pin 30 at the fuel pump relay, so this power would be pulled from fuse #16 and passed through a relay. It seems like it...
Forum: Porsche 911 Technical Forum 11-03-2025, 10:47 AM
Replies: 68
Views: 2,170
Posted By massmike
Working on adding a 3-wire O2 sensor now....

Working on adding a 3-wire O2 sensor now. Interestingly enough while looking for a way to tap into the 12V power from the WUR I discovered this loose plug with a red/white & brown wire. This plug is...
Forum: Porsche 911 Technical Forum 11-03-2025, 10:40 AM
Replies: 68
Views: 2,170
Posted By massmike
Thank you, I read though that thread and tried to...

Thank you, I read though that thread and tried to adjust my driving style with keeping revs a bit higher than I normally would. I honestly didn't notice much difference in the surging effect. I am...
Forum: Porsche 911 Technical Forum 10-29-2025, 12:42 PM
Replies: 68
Views: 2,170
Posted By massmike
Still hoping for some help here. I made the...

Still hoping for some help here. I made the following changes but still have a slight surging while in closed loop.

-Replaced the O2 sensor with a new Bosch 11027 (This is the same as I...
Forum: Porsche 911 Technical Forum 10-27-2025, 10:11 AM
Replies: 68
Views: 2,170
Posted By massmike
Quick update here. I have read each comment and...

Quick update here. I have read each comment and the links that have been posted. With what I read I understood that I could adjust mixture using the duty cycle of the FV, so I attempted this...
Forum: Porsche 911 Technical Forum 10-21-2025, 12:24 PM
Replies: 68
Views: 2,170
Posted By massmike
Ok so had a bit of time today to play around with...

Ok so had a bit of time today to play around with a few things.

First the 35 Degree switch. I was able to reach in the back an clamp on a test lead to the electrical connection. With the car cold...
Forum: Porsche 911 Technical Forum 10-21-2025, 07:03 AM
Replies: 68
Views: 2,170
Posted By massmike
Any chance the surging could be coming from the...

Any chance the surging could be coming from the O2 sensor coming in and out of its designed heat range due to the increased exhaust flow? I thought I had previously read that the O2 needed to...
Forum: Porsche 911 Technical Forum 10-21-2025, 06:40 AM
Replies: 68
Views: 2,170
Posted By massmike
Is this enrichment done through the cold start...

Is this enrichment done through the cold start valve?
Forum: Porsche 911 Technical Forum 10-20-2025, 10:03 AM
Replies: 68
Views: 2,170
Posted By massmike
What would typically cause this? At...

What would typically cause this?




At this point I do not want to just leave the O2 senor disconnected. That's why I am trying to understand what could be causing this issue.



This is...
Forum: Porsche 911 Technical Forum 10-20-2025, 08:22 AM
Replies: 68
Views: 2,170
Posted By massmike
I tried unplugging the 35C switch (A pain to get...

I tried unplugging the 35C switch (A pain to get to!) but no difference in the surging. It did seem like the it made the car start a bit harder when slightly warm (car off for about and hour). Thank...
Forum: Porsche 911 Technical Forum 10-20-2025, 08:19 AM
Replies: 68
Views: 2,170
Posted By massmike
The connection is a crimp style butt connector...

The connection is a crimp style butt connector with a piece of shrink wrap around it. This was all provided with the Bosch replacement O2 sensor. Not saying this is 100% correct but it must be what...
Forum: Porsche 911 Technical Forum 10-16-2025, 01:36 PM
Replies: 68
Views: 2,170
Posted By massmike
In this article regarding Lambda ECU's it is...

In this article regarding Lambda ECU's it is mentions there is a well known "Pulling" effect while constant driving/cruising. I haven't been able to find any more information on this well know...
Forum: Porsche 911 Technical Forum 10-16-2025, 01:25 PM
Replies: 68
Views: 2,170
Posted By massmike
I had my fingers crossed for an easy fix...

I had my fingers crossed for an easy fix but....no such luck. I swapped the Lambda O2 sensor to the port farther down stream and no noticeable change in the surging while driving in closed loop. AFR...
Forum: Porsche 911 Technical Forum 10-16-2025, 06:58 AM
Replies: 68
Views: 2,170
Posted By massmike
Stock exhaust, except the catalytic converter has...

Stock exhaust, except the catalytic converter has been removed and replaced a bypass pipe. Once thing I did find a bit strange was the location of the stock O2 sensor location, it only reads one bank...
Forum: Porsche 911 Technical Forum 10-16-2025, 06:49 AM
Replies: 68
Views: 2,170
Posted By massmike
Would you expect there to be some drivability or...

Would you expect there to be some drivability or idle issues in open loop if there was a vacuum leak? Also the wideband is showing that the ECU is trying to lean the mixture when in closed loop...
Forum: Porsche 911 Technical Forum 10-16-2025, 06:40 AM
Replies: 68
Views: 2,170
Posted By massmike
At first I thought the same thing about air leaks...

At first I thought the same thing about air leaks so I did verify, with a smoke machine that there were no leaks. First attempt identified the decel valve vac line and the cruise control module line...
Forum: Porsche 911 Technical Forum 10-15-2025, 03:37 PM
Replies: 68
Views: 2,170
Posted By massmike
Yes, It is most noticeable at light throttle...

Yes, It is most noticeable at light throttle while cruising (Typically 2K-3K rpm). If you accelerate hard the surging is not noticeable. No surging at idle either.
Forum: Porsche 911 Technical Forum 10-15-2025, 12:50 PM
Replies: 68
Views: 2,170
Posted By massmike
CIS Surging Under Constant load

Looking for some help to solve a problem I have been chasing for a few months now. Car is a 1982 911SC with a 3.0L and the original CIS system. My issue is when the car is running in closed loop...
Showing results 1 to 24 of 24

 
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