Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, ARE due Dec 4th, 2022. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

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)

Misfire after plug change

Recommended Posts

Need some help, I changed the plugs on drivers side and started her up and CEL came on and is misfiring, Plugs are defo in proper and im a bit worried. I have changed plugs on loads of cars and are usually very easy but the Porsche not so, Im wondering if the coils are seated properly. Do the screws seat them properly or do they need a good shove in as im thinking maybe the furthest rear coil didn't pop in and was a little proud when I put the screws back in. Any thoughts?


Link to comment
Share on other sites

  • Admin

The most obvious are:

1. Are all the spark plugs tightened down? (I've forgotten one myself before).

2. Are the electrical connector on the coil packs firmly snapped in place?

3. Push the coil pack on each spark plug firmly until you feel the contact - then tighten the screws down (as they just keep them in place).

If all of the those are okay - then it will be time to get the ohm meter out.

Link to comment
Share on other sites

I changed the plugs at the same time I switched out my IMS, AOS and chain tensioners. Scared the synthetic out of me with the stumbling engine and CEL light coming on. I had tried to replace the plugs without dropping the mufflers and I apparently wasn't able to get it quite right with such as small space to work in. For me it was item 2 on Loren's list. In my case this was easily addressed once I retried the plug install with the mufflers dropped. Hope your issue turns out as simple.

Kind Regards

Link to comment
Share on other sites

Job done!!! Not much skin left on my arms but she's done and feels even better to drive, Misfire was a electric connector plug not seated properly, Not sure if they were the original plugs (Beru) but they looked done anyway, Cleaned all the coils. Noticed 2 of the coils were different part numbers and the seating bolts were harder to get out so think they must be originals too. My exhaust manifolds don't look great right enough so may replace these in the near future. Bone dry underneath regarding oil leaks so that's good.


Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • 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.