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

Reply
 
LinkBack Thread Tools Display Modes
Old 09-27-2005, 09:24 AM   #1
Registered User
 
Join Date: Jan 2005
Location: Southern Cali
Posts: 494
Jumpy Throttle

I have a 2000 Boxster S with 42,000 miles, here's the deal:

--When shifting from 1-2, or 3-4, etc my throttle blips up a few hundred RPM once I disengage the clutch and start going into the next hear up.

--When in nuetral and I step on the gas a little bit, its almost like the throttle gets stuck a little and over-revs (nothing dangerous but it should stop revving once the pedal is lifted).

--No CEL

Nothing serious, however its is beginning to get a little worse over the past 10,000 miles.

MAF?, dirty Vac hose somewhere??

Any help is much appreciated.

AC


Last edited by KRZTACO; 09-27-2005 at 03:53 PM.
KRZTACO is offline   Reply With Quote
Old 09-27-2005, 03:53 PM   #2
Registered User
 
Join Date: Jan 2005
Location: Southern Cali
Posts: 494
Bump......
KRZTACO is offline   Reply With Quote
Old 09-27-2005, 04:06 PM   #3
Registered User
 
deliriousga's Avatar
 
Join Date: Jun 2005
Location: USA!!
Posts: 1,159
Is it all the time or just when cold, hot or warming up?

Sounds like the MAF, O2 sensor or vacuum leak. You can try plugging in an OBDII reader that will record the outputs and resistance of sensors and see if anything is strange. That may help in figuring out which it is.
__________________
1987 928S4 Silver Metallic (980)/Navy (TP) 5-Speed
2000 Boxster Speed Yellow/Black 5-Speed
1966 Wife White/Brown Top
1986 Daughter White/Brown Top (Sold!)
1992 Daughter White/Blonde Top
deliriousga is offline   Reply With Quote
Old 09-28-2005, 12:36 AM   #4
Registered User
 
Join Date: Sep 2005
Location: manchester england
Posts: 7
Send a message via AIM to blakey Send a message via MSN to blakey
same problem

hi krztaco..........

i have the exact same problem on my 2.7 boxster. if its any conselation to you mine has been doing it for the last 15 months and not got any worse, but i'm as intrigued as you as to what the problem is and what possibly can cure it......

i wait in anticipation

steve........
blakey is offline   Reply With Quote
Old 09-28-2005, 12:13 PM   #5
Registered User
 
Join Date: Jan 2005
Location: Southern Cali
Posts: 494
The throttle happens when its hot and cold.

Anyone............Anyone?????


Bueller............Bueller???????




KRZ
KRZTACO is offline   Reply With Quote
Old 09-29-2005, 07:59 AM   #6
Registered User
 
Join Date: Jan 2005
Location: Southern Cali
Posts: 494
I have it narrowed down to the following:

--IACV
--Throttle housing

KRZ
KRZTACO is offline   Reply With Quote
Old 09-29-2005, 04:27 PM   #7
Registered User
 
Join Date: Sep 2005
Location: Minneapolis/St. Paul, Minnesota, USA
Posts: 3,308
Hi,

Excuse my ignorance, but isn't the 2.7 Drive by Wire? If so, couldn't it also be a Software issue?

Happy Motoring!...Jim'99
MNBoxster is offline   Reply With Quote
Old 09-29-2005, 05:32 PM   #8
Registered User
 
deliriousga's Avatar
 
Join Date: Jun 2005
Location: USA!!
Posts: 1,159
Having a brain fart. IACV=???
__________________
1987 928S4 Silver Metallic (980)/Navy (TP) 5-Speed
2000 Boxster Speed Yellow/Black 5-Speed
1966 Wife White/Brown Top
1986 Daughter White/Brown Top (Sold!)
1992 Daughter White/Blonde Top
deliriousga is offline   Reply With Quote
Old 09-30-2005, 07:13 AM   #9
Registered User
 
Join Date: Apr 2004
Location: San Diego
Posts: 28
My 2.7 has the same issue. I swapped out the MAF but it did not help. I checked for vacum leaks and found nothing. Now I am left with replacing O2 sensors and/or the throttle regulator. Does ANYONE have any experience doing any of these repairs???
psuball1 is offline   Reply With Quote
Old 09-30-2005, 07:33 AM   #10
Registered User
 
slogans7's Avatar
 
Join Date: May 2005
Location: San Clemente, CA
Posts: 244
Idle Control Valve, I think.

Adam - Maybe something as simple as lubricant on the pedal mechanism?

Actually I'm having a similar problem on my Tip. Shifting manually, in 4th and 5th, I often get a noticable power surge around 3K or a bit under. It almost feels like it's downshifting although it isn't. Odd.
__________________
2002 Triple-Black Boxster S
slogans7 is offline   Reply With Quote
Old 09-30-2005, 08:10 AM   #11
Registered User
 
Join Date: Jan 2005
Location: Southern Cali
Posts: 494
[QUOTE=deliriousga]Having a brain fart. IACV=???[/QUOTE

I.dle

A.ctuator

C.ontrol

V.alve

http://www.pca.org/tech/tech_qa_question.asp?id={2FE2DB7F-066E-44BB-86B6-F94296717EDC}
KRZTACO is offline   Reply With Quote
Old 10-16-2005, 05:39 PM   #12
Registered User
 
deliriousga's Avatar
 
Join Date: Jun 2005
Location: USA!!
Posts: 1,159
Quote:
Originally Posted by KRZTACO
I.dle

A.ctuator

C.ontrol

V.alve
A little info (and question) about the IACV. I was recently having a similar problem in the 928 so I started searching the forum for that car to see if I could expect a new MAF, O2 Sensor, or what. Turns out it's the same problem KRZTACO had, but very easy to fix. Several threads on the forum had people (including techs who work on our cars) who popped open the intake hose that connects to the IACV and sprayed WD40 in it. They let it sit for 5+ minutes then reconnected the hose and cranked her up. If it didn't take care of it, they repeated 2-3 times. I did this today and voila, the idle is smooth as silk. Two minutes and $.05 of WD40 was a sweet fix.

So the question is, can this be done with the Boxster? Is there an intake hose like this that is accessible and directly connected to the IACV?

Thanks!

__________________
1987 928S4 Silver Metallic (980)/Navy (TP) 5-Speed
2000 Boxster Speed Yellow/Black 5-Speed
1966 Wife White/Brown Top
1986 Daughter White/Brown Top (Sold!)
1992 Daughter White/Blonde Top
deliriousga 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 11:11 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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