Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical Chat

 
 
LinkBack Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 12-09-2014, 12:37 PM   #1
Registered User
 
darkstormvx's Avatar
 
Join Date: Jan 2008
Location: VA
Posts: 43
987 Cuts out Briefly Under Acceleration.

Hey Guys,
2005 987 S 178,000 miles.
I'm having an issue during acceleration from stops and on the highway. This occurs at any engine temperature. Usually occurs after a stop sign or light. I will accelerate moderatly, like you would to pull into the street, and as the RPMs build and I accelerate I will lose engine power for a brief moment. Maybe 2 or 3 seconds, and then the power jumps back like nothing happened. When I lose power, the RPMs drop slightly, but never below idle, and there is a distinctive jerk every time it happens, like the power gets reversed for a second. This happens usually on main streets but also on the highway while cruising, albeit while crusing its just brief second or so. It happens more since it's colder.

It's been going on a few months and I figured it's the fuel pump, since I've been having trouble starting the car a lot for several months. It always started but took several revs. Now, I've replaced the fuel pump, and it starts like a champ, but I still get these moments of lost power. I figured the pump was the cause for both problems since cutting out is a symptom of a bad pump, but I'm not sure now. It happens after I hit sizeable bumps on the highway too.

I think it may be the fuel pump relay or throttle body needing cleaning. Ive run thru fuel system cleaner a while ago, and I lost the AOS almost a year ago, which required some cleaning and replacement if that makes a difference.

If anyone has an opinion it would be appreciated before I goto the dealership. No CELs. No weird smoke or sounds. Spark plugs mostly new, around a year and a half old. Thx.
__________________
Black/Black 987 2005 S
darkstormvx is offline   Reply With Quote
 


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 12:50 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page