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 Forums > Porsche Forums > Porsche 911 Technical Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
Join Date: May 2004
Location: San Diego, CA
Posts: 52
It Runs, but a little rough

After a year of on-again-off-again work, I started the engine this weekend and took my first test drive. What a charge! I couldnít believe the responsiveness from the 2.7. I bought my í74 911 from a guy who froze the engine in 1999 and hadnít driven it since.

I still have a lot of work to do (obviously, as you all know). My main problem is the idle, which wonít hold steady below 1800 RPM. I set the timing and dwell and put injector cleaner in the gas tank. The valves, which were assembled and set by a San Diego machine shop, are VERY loud. I donít know if it's affecting the idle, but I just ordered the gauge, so I can fix it next weekend. I installed new vacuum hoses when I did the rebuild and the car starts right up when warm (so Iím assuming itís not the accumulator). The threads that Iíve been reading lead me to thinks itís a vacuum leak; the idle doesnít drop when I remove the oil cap. I ended up with two disconnects from my rebuild (see pictures below). Thereís a tan and gray wire that wasnít connected when I bought the car and Iíve never found a home or it. I also have an unidentified vacuum device that I never hooked up. The small nipple on the right side of the charcoal canister is the likely suspect, since itís unconnected, but plugging it with my finger doesnít make any difference to the idle.

My plan is to adjust the valves and then find a mechanic that knows what heís doing. Any thoughts?

Thanks,

Charley
Old 11-28-2004, 05:26 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered User
 
Join Date: May 2000
Location: Los Alamos, NM, USA
Posts: 6,044
The item with the hose is not a vacuum component. It is the drain valve off the bottom of the air box. The plastic portion with the rubber duckbill type valve mounts outboard on the sheet metal at the passenger front just above the starter. The hose connects to a barb on the bottom of the airbox. Jim
Old 11-28-2004, 05:54 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
Join Date: May 2000
Location: Los Alamos, NM, USA
Posts: 6,044
See drain mounted to left of starter in the below image.



Jim
Old 11-28-2004, 06:04 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Registered User
 
dweymer's Avatar
 
Join Date: Nov 2004
Location: Tucson, AZ
Posts: 2,356
Garage
I just bought my 74, and I think I have the same wire not connected, I will check.
__________________
Donnie

Currently Porsche-less.....
Old 11-28-2004, 06:38 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered User
 
Join Date: May 2004
Location: San Diego, CA
Posts: 52
Thanks Jim. Below is picture of a barb that I thought was unused on my car. I put my finger in it and it felt closed off.. Does the other end of the duckbill valve go there?


Don, thanks for looking for the wayward wire.

Charley
Old 11-28-2004, 06:50 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered User
 
Join Date: May 2000
Location: Los Alamos, NM, USA
Posts: 6,044
No, the drain hose goes on the bottom of the black plastic air box to the left and up from the nozzle circled. The nozzle circled is not used in 1974 (see below thread) but in later years (1975 onward) was connected to the auxilary air and additional air valves. Jim

It Fires...with a little help! Fuel Line Question
Old 11-28-2004, 07:18 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
Registered User
 
Join Date: May 2004
Location: San Diego, CA
Posts: 52
Jim,

Again, thanks. I'll find it.
Old 11-28-2004, 07:27 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Registered User
 
dweymer's Avatar
 
Join Date: Nov 2004
Location: Tucson, AZ
Posts: 2,356
Garage
Checked today, mine is not connected to anything either. I have an idle around 2k also, but it will come down if I pull the linkage by hand. Still trying to find the bind.
__________________
Donnie

Currently Porsche-less.....
Old 11-29-2004, 12:55 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Registered User
 
Join Date: May 2004
Location: San Diego, CA
Posts: 52
Thanks Don. When I get my car to idle below 2k, on a regular basis, I'll post another thread to let you know what it was (or what I did).

Charley
Old 11-29-2004, 02:21 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 10:59 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 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.