Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   Pelican Parts Technical BBS > 1- Porsche Technical Forums > Porsche 964 & 993 Technical Forum

LinkBack Thread Tools Rate Thread
Thread Post New Thread    Reply
Registered User
e p slick's Avatar
Join Date: Mar 2004
Location: Tucson
Posts: 1,289
993 idle adjust

I have a 95 993 that surges on idle - mostly when cold. Is idle adjust mechanical or electronic. If mechanical where is the screw. I'm old and don't see well.
Thanks in advance.
AMG V8 SL55 Mercedes, 993 C2, 86' Carrera 3.6 hot rod, Purple 1998 993 that didn't make the cut, 3 very old 930s, A/Fuel Dragster CH3NO2 (R.I.P.), Blown Alcohol TAD, AA/AA, 360 Maxim wingless, Cummins Turbo Diesel. Amateur Welder, Painter and sculptor sort of. -
Old 10-14-2012, 08:10 AM
  Pelican Parts Technical Article Directory    Reply With Quote #1 (permalink)
Join Date: Jul 2010
Location: ND
Posts: 683
I don't know how much change occurred for the 993, but my 964 was surging on idle, although mostly when hot. I don't believe there are any mechanical idle adjustments to be made on the aircooled 3.6 cars.

If it helps you any, my final diagnosis was having added too much oil at my last change, which fouled the idle stability valve, airflow meter, and/or throttle body sufficiently to make the car not idle well. I removed about a half-quart of oil the hard way, cleaned as much of the intake as I could reach (without removing the throttle body from the car) with throttle body cleaner (although I used carburetor cleaner on the ISV), and when I put it back together I had no more idle gremlins. If that hadn't worked, the next likely culprits were cylinder head temperature sensors, the O2 sensor, and after that the ignition system. I had already eliminated the fuel filter as a culprit by replacing it.
Old 10-14-2012, 08:23 AM
  Pelican Parts Technical Article Directory    Reply With Quote #2 (permalink)

Thread Tools
Rate This Thread
Rate This Thread:


All times are GMT -8. The time now is 03:32 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2017 Pelican Parts LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.