Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

2004 Boxster Engine IMS failure. Replaced engine and have issues

macmann

By macmann
in 986 Series (Boxster, Boxster S)

 Share

Recommended Posts

macmann Member

macmann

Posted
Posted

I have a 2004 Boxster S with IMS failure.  I purchased a used 2002 engine from a Boxster S and swapped it in.  The vehicle does not run right.  I assume it has something to do with Variocam.  Has anyone done this swap or does anyone know how to resolve this issue?  A simple tune can take care of it?  

  • Moderators
JFP in PA Member

JFP in PA

Posted
  • Moderators
Posted

I have a 2004 Boxster S with IMS failure.  I purchased a used 2002 engine from a Boxster S and swapped it in.  The vehicle does not run right.  I assume it has something to do with Variocam.  Has anyone done this swap or does anyone know how to resolve this issue?  A simple tune can take care of it?  

 

Welcome to RennTech :welcome:

 

Along with potential fuel system issues, the 2002 engine used a 7.2 DME and is VarioCam, while your 2004 car has a 7.8 DME and VarioCam+.   To make this work, you either have to change the car back to the earlier DME, or update the engine to the later version of VarioCam.  The 7.8 DME is not backwards compatible.

macmann Member

macmann

Posted
  • Author
Posted

I have a 2002 DME ready to go.  The vehicle still will not start.  I looked at wiring and there are a few minor changes in the wiring but I don't think those are related to the no start issue.  Immobilizer, Key and DME were replaced from a wrecked 2002 car into the 2004 car.  THe cluster lights up and will not shut off.  If you unplug DME, the cluster shuts off till I insert key again.  

  • Moderators
JFP in PA Member

JFP in PA

Posted
  • Moderators
Posted

I have a 2002 DME ready to go.  The vehicle still will not start.  I looked at wiring and there are a few minor changes in the wiring but I don't think those are related to the no start issue.  Immobilizer, Key and DME were replaced from a wrecked 2002 car into the 2004 car.  THe cluster lights up and will not shut off.  If you unplug DME, the cluster shuts off till I insert key again.  

 

It is not just a matter of finding a DME to match the engine; your chassis made wider use of CAN Bus communications for the control module network functions, while the older DME did not have as many control modules and routed communication's differently.  There is a huge technology gap between the 7.2 and 7.8 DME's.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.