Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

Reply
 
LinkBack Thread Tools Display Modes
Old 08-15-2018, 06:34 AM   #1
Registered User
 
Join Date: Jul 2018
Location: Virginia
Posts: 14
Possible Vacuum Leak??

Car = 98/986

So I was getting misfire codes for cylinders 1-3.. I replaced plugs and coils for all three cylinders and cleared codes. Next day, misfires on all three again. After doing more research on the issue it seems like I may have a vacuum leak?? Am I moving in the right direction? Should I proceed to check for vacuum leaks or should I check other possible issues first?

Thanks

Cjamerson1212 is offline   Reply With Quote
Old 08-15-2018, 05:39 PM   #2
Santa Barbara, CA
 
Join Date: Mar 2016
Posts: 38
It's an easy test and may find your problem, or one you have and didn't know you had.

Get yourself a can of starting fluid and and with the engine idling, (carefully, it's flammable) spray small amounts of ether around the AOS hoses and intake manifold. If you get a change in the RPM (an increase) you've found a vacuum leak. Electrical tape is your friend while you wait to do the fix.

Woody gave me this suggestion on a problem of misfiring at high rpm that both the local P dealer and Indy shop wanted $800 to diagnose after paying them $160 each to get an estimate. (sorry guys, I'm not that stupid). Save your money and get the ether.

Good luck. It's definitely an enthusiast's car, and it helps the wallet if you can do a bit of wrenching.
__________________
'98 986 Arctic Silver

Last edited by jvfante; 08-15-2018 at 05:45 PM. Reason: correction to statement
jvfante is offline   Reply With Quote
Old 08-15-2018, 06:06 PM   #3
Artist, 986S tinkerer
 
NewArt's Avatar
 
Join Date: Aug 2013
Location: Montreal, Canada
Posts: 1,570
I made a video about this on my YouTube channel: https://www.youtube.com/user/12shoes2
Jvvfante has the key here if you donít want to watch my 10 minute adventure!

__________________
James
2004 986 S
987 air intake TB and plenum, Mantissport 2 litre sump, UDP, Bilstein B6 with H&R lowering spings, re71-rs for track, other stuff.
https://www.youtube.com/user/12shoes2
NewArt is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 02:20 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs 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