GermanCarFan1

https://rennlist.com/forums/991/9061...ble-issue.html

PCARNTHZST

thought I would post an update for anyone interested.

I never did end up installing the gas peddle I bought on eBay (I still have it if anyone is looking for one). What I did replace was the Cam Sharft sensors (both of them), Porsche calls them Hall Senders. The part number is 997 606 106 03

The job took all of 40 min from start to finish and now my car performs like new again. No more hesitation / stumble.

Porsche_nuts

Thanks for info. Are there DIY install instructions or did you have a shop install?

PCARNTHZST

I did the job myself, below is the DIY tutorial I used. I left the rear bumper on, If you have changed your own spark plugs this job is even easier.

oolor13

I have a video from Pelican Parts bookmarked for this in case I need to do it in the future -

PCARNTHZST

It would appear these hall senders should be considered a wear and tear item. My car ran great until I hit 87,000km (54059 miles).

Goofen

My 991.1 4s was at the dealer (under warranty) for the past week to resolve the stumbling issue - they reprogrammed/reset the DME/ECU, performed a leak test (no issues), and now the stumbling issue seems to be resolved (for now....)

Joec500

I am at 107k miles and have spare ones sitting in my spart parts bin. I may just proactively change them to see if the throttle response changes, but the car seems to be pretty happy in that department.

Jim986

Is this just a 991.1 issue? Never had any issues with my 991.2.

PCARNTHZST

the dealer had my car for a week, tested it and did programming but it never solved anything (this was out of pocket for me). They did notice the stumble but could say for sure what would fix it.

PCARNTHZST

from what I’ve read this effects the 997.2 and 991.1 with the 3.8 liter engine.

someone can correct me if I’m wrong.

stellman

No ECU reset or anything? It went from reproducible stumble, replace hall senders, then non-reproducible? No battery disconnect or throttle re-alignment?

Just checking before I check out on FCP Euro

PCARNTHZST

I did not rest anything, nor did I disconnect the battery.

After the Hall Sender replacement my issue was resolved.

stellman

Just had both Hall Senders replaced and my car is running noticeably smoother now. I've only driven it a few miles, but those first few miles were odd because I wasn't having to compensate for the lag that I was having.

Thanks for the heads up on replacing them!

RwdConnor

Where did you get the Hall Senders from? Link if possible