menzzer37

I have a 96 993, manual. Battery disconnected to change the steering wheel and when reconnected, I let it idle for 15 min to re-learn. The idle has stayed very low though. Before the disconnect, it idled much higher. I tried to "learn" function where you leave it disconnected then reconnect and idle for 10-15 minutes, but it's still super lower. I'm posting a video from this morning. It's cold here in Indiana (20 degrees). No issues when oil was cold, but as it came up to temp, it was trying to die at a stop. If you let the revs come down gently, no issue, it will catch itself. If you rev, then clutch, it will sputter and die. See the video link. This is in neutral and just revving but you can see the near stall.

pp000830

Hi Menzzer,
Cold weather, not driven around for adaption, Don't worry too much. If it still does this in warmer weather after a bit of driving the symptom may disappear, if not clean the idle valve.
Andy

menzzer37

Thanks! I pulled the valve and man was it chunky. It did not move freely at all when tilted. I blasted it out (even q tipped it) until it moved smoothly. That pulled the idle up slightly and it doesn't stumble now when revving. I also removed the epoxy from the set screws in preparation for turning up the idle if needed.

Thanks guys!

71-3.0-911

When you disconnected the battery, the ecu had to relearn the proper idle "catch" if you will. If you had simply let it die when it was having that behavior, it would fix itself on restart. This will happen every time you disconnect the battery for any reason.

Sounds like your ISV may have exacerbated the issue a bit. Good call on cleaning it out.

-Scott

menzzer37

It died many times. It didn’t appear to learn anything from those stalls

71-3.0-911

"Sounds like your ISV exacerbated the issue a bit."

Now that your ISV is clean, I'll bet my comment still applies. As stated, this is exactly the behavior exhibited by every 96 that has the battery disconnected.

menzzer37

Should I unhook the battery and let it relearn with the cleaned valve?

71-3.0-911

I don't think that is necessary. Glad it's working well now. Enjoy!