Rev drops slowly from 1500 RPM after complete stop - Pontiac Solstice Forum

» Auto Insurance
» Featured Product
Wheel & Tire Center

Go Back   Pontiac Solstice Forum > Technical Solstice Discussion > General Tech, Platform Common Issues & Solutions
Register Home Forum Gallery Owner Registry Garage Search Today's Posts Mark Forums Read Auto Escrow

SolsticeForum.com is the premier Pontiac Solstice Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 11-04-2012, 02:11 PM   #1 (permalink)
Member
 
ToniCipriani's Avatar
 
Join Date: Dec 2010
Location: Markham, ON
Rev drops slowly from 1500 RPM after complete stop

Not sure when exactly did this started happening, but I noticed my car would stick at 1500RPM (sometimes 1800RPM - 2000RPM) after coming to a complete stop and thrown into neutral. After being stuck for a few seconds, it'll slowly drop back to the usual level.

Checked floormats and pedals already, not stuck at all.

Only recent happenings are installing my GMPP intake, replaced cat and water pump under warranty, and battery went flat and jumpstarted after I came back from vacation. Could the jumpstart of the battery messed up a sensor or something, or the cat failed again?
__________________
2006 Solstice I4 2.4L "Kristin", Dark Tarnished Silver Metallic, 1SA+PCQ+G80+JL9+ZQ2+ZQ3
Mods: Kappasphere kappaATTIC, Kappasphere kappaShield, JPM Seatbelt Loops, FIAMM Freeway Blaster Dual, LED footwells, GMPP CAI

2006 G6 SE V6 3.5L Sedan "Sharon", Stealth Gray Metallic, 1SA+CF5+PCM+PDX - Sold but will not be forgotten... will always have a special place in my heart.

Life moves fast, don't miss a thing.
ToniCipriani is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 11-04-2012, 02:23 PM   #2 (permalink)
Member
 
glake89's Avatar
 
Join Date: Apr 2011
Location: Interlochen, MI
Sticking throttle actuator or pedal sender?
__________________
been fixin' cars for 71 years

Some of what I know is from experience, some from listening or reading- most of it, I just make up

glake89 is offline   Reply With Quote Quick reply to this message
Old 11-04-2012, 04:29 PM   #3 (permalink)
Member
 
ToniCipriani's Avatar
 
Join Date: Dec 2010
Location: Markham, ON
Well not sure yet. I'm booked in to the dealer for coming Fiday, just thinking if there's anything else I can check. I'm actually thinking if I should even take out my intake... dealers love to blame this and that.
__________________
2006 Solstice I4 2.4L "Kristin", Dark Tarnished Silver Metallic, 1SA+PCQ+G80+JL9+ZQ2+ZQ3
Mods: Kappasphere kappaATTIC, Kappasphere kappaShield, JPM Seatbelt Loops, FIAMM Freeway Blaster Dual, LED footwells, GMPP CAI

2006 G6 SE V6 3.5L Sedan "Sharon", Stealth Gray Metallic, 1SA+CF5+PCM+PDX - Sold but will not be forgotten... will always have a special place in my heart.

Life moves fast, don't miss a thing.
ToniCipriani is offline   Reply With Quote Quick reply to this message
Old 11-04-2012, 04:31 PM   #4 (permalink)
Member
 
WintR's Avatar
 
Join Date: Feb 2006
Location: Florissant, MO
That's normal for mine - it's an emissions thing.
__________________
Deep, steel/sand, loaded except standard radio and no smoker's; #08974
Mods: Kappasphere CAI, Clear Image Shorty Header, second horn, visor decals, mudflaps, tonneau cover, brake light flasher, trailer hitch, 'lil Chromies, trunk monkey, retune, DDMWorks backbone, GMPP Suspension, wood grain dash, Solo Quiet cat-back exhaust, deleted:Solo high-flow cat
WintR is offline   Reply With Quote Quick reply to this message
Old 11-04-2012, 06:23 PM   #5 (permalink)
Member
 
ToniCipriani's Avatar
 
Join Date: Dec 2010
Location: Markham, ON
Quote:
Originally Posted by WintR View Post
That's normal for mine - it's an emissions thing.
Stuck at 2000RPM? doesn't sound right...
__________________
2006 Solstice I4 2.4L "Kristin", Dark Tarnished Silver Metallic, 1SA+PCQ+G80+JL9+ZQ2+ZQ3
Mods: Kappasphere kappaATTIC, Kappasphere kappaShield, JPM Seatbelt Loops, FIAMM Freeway Blaster Dual, LED footwells, GMPP CAI

2006 G6 SE V6 3.5L Sedan "Sharon", Stealth Gray Metallic, 1SA+CF5+PCM+PDX - Sold but will not be forgotten... will always have a special place in my heart.

Life moves fast, don't miss a thing.
ToniCipriani is offline   Reply With Quote Quick reply to this message
Old 11-05-2012, 06:37 AM   #6 (permalink)
Member
 
Join Date: Feb 2009
The first thing I'd do is see if there are any DTCs stored.
Carbon Sky is offline   Reply With Quote Quick reply to this message
Old 11-05-2012, 07:16 AM   #7 (permalink)
Member
 
ToniCipriani's Avatar
 
Join Date: Dec 2010
Location: Markham, ON
No CEL, but I'll scan it tonight anyways.
__________________
2006 Solstice I4 2.4L "Kristin", Dark Tarnished Silver Metallic, 1SA+PCQ+G80+JL9+ZQ2+ZQ3
Mods: Kappasphere kappaATTIC, Kappasphere kappaShield, JPM Seatbelt Loops, FIAMM Freeway Blaster Dual, LED footwells, GMPP CAI

2006 G6 SE V6 3.5L Sedan "Sharon", Stealth Gray Metallic, 1SA+CF5+PCM+PDX - Sold but will not be forgotten... will always have a special place in my heart.

Life moves fast, don't miss a thing.
ToniCipriani is offline   Reply With Quote Quick reply to this message
Old 11-05-2012, 04:09 PM   #8 (permalink)
Member
 
ToniCipriani's Avatar
 
Join Date: Dec 2010
Location: Markham, ON
One more finding... It only happens after the car is fully warmed, above 91 degrees Celsius.
__________________
2006 Solstice I4 2.4L "Kristin", Dark Tarnished Silver Metallic, 1SA+PCQ+G80+JL9+ZQ2+ZQ3
Mods: Kappasphere kappaATTIC, Kappasphere kappaShield, JPM Seatbelt Loops, FIAMM Freeway Blaster Dual, LED footwells, GMPP CAI

2006 G6 SE V6 3.5L Sedan "Sharon", Stealth Gray Metallic, 1SA+CF5+PCM+PDX - Sold but will not be forgotten... will always have a special place in my heart.

Life moves fast, don't miss a thing.
ToniCipriani is offline   Reply With Quote Quick reply to this message
Old 11-05-2012, 05:08 PM   #9 (permalink)
Member
 
ToniCipriani's Avatar
 
Join Date: Dec 2010
Location: Markham, ON
Partially fixed. My intake was loose after the MAF, so part of it was disconnected. I've reseated it now, and seems to have cured it, except that now it still does it a tad bit about 1000RPM but it drops revs much more normal now. Probably because of the loose intake it was running lean for a bit, the computer needs to relearn?

I hope I didn't do any damage... gonna get an oil change ASAP to get whatever crap it sucked in this period out (due for one anyways).
__________________
2006 Solstice I4 2.4L "Kristin", Dark Tarnished Silver Metallic, 1SA+PCQ+G80+JL9+ZQ2+ZQ3
Mods: Kappasphere kappaATTIC, Kappasphere kappaShield, JPM Seatbelt Loops, FIAMM Freeway Blaster Dual, LED footwells, GMPP CAI

2006 G6 SE V6 3.5L Sedan "Sharon", Stealth Gray Metallic, 1SA+CF5+PCM+PDX - Sold but will not be forgotten... will always have a special place in my heart.

Life moves fast, don't miss a thing.
ToniCipriani is offline   Reply With Quote Quick reply to this message
Old 11-05-2012, 05:56 PM   #10 (permalink)
Member
 
WintR's Avatar
 
Join Date: Feb 2006
Location: Florissant, MO
Quote:
Originally Posted by ToniCipriani View Post
Stuck at 2000RPM? doesn't sound right...
If I take it out of gear while moving, or as soon as stopped, it hangs above idle a few seconds. The computer holds the throttle open a bit while the car is moving, to minimize emissions when you take your foot off the pedal. It takes a second or two for it to drop all the way to closed-throttle idle.
Leaking air around the MAF will confuse the computer, though, making it hold the throttle open more, because it doesn't know about the extra air flow. Now you've corrected that problem, it will hunt for the new setting a while.
__________________
Deep, steel/sand, loaded except standard radio and no smoker's; #08974
Mods: Kappasphere CAI, Clear Image Shorty Header, second horn, visor decals, mudflaps, tonneau cover, brake light flasher, trailer hitch, 'lil Chromies, trunk monkey, retune, DDMWorks backbone, GMPP Suspension, wood grain dash, Solo Quiet cat-back exhaust, deleted:Solo high-flow cat
WintR is offline   Reply With Quote Quick reply to this message
Old 11-05-2012, 07:37 PM   #11 (permalink)
Member
 
ToniCipriani's Avatar
 
Join Date: Dec 2010
Location: Markham, ON
Makes sense. I'll continue to monitor it for a few days. Thanks!
__________________
2006 Solstice I4 2.4L "Kristin", Dark Tarnished Silver Metallic, 1SA+PCQ+G80+JL9+ZQ2+ZQ3
Mods: Kappasphere kappaATTIC, Kappasphere kappaShield, JPM Seatbelt Loops, FIAMM Freeway Blaster Dual, LED footwells, GMPP CAI

2006 G6 SE V6 3.5L Sedan "Sharon", Stealth Gray Metallic, 1SA+CF5+PCM+PDX - Sold but will not be forgotten... will always have a special place in my heart.

Life moves fast, don't miss a thing.
ToniCipriani is offline   Reply With Quote Quick reply to this message
Old 11-08-2012, 04:22 PM   #12 (permalink)
Member
 
ToniCipriani's Avatar
 
Join Date: Dec 2010
Location: Markham, ON
Update... still does 2K, but only on rare occasions where I am stuck in traffic. What worries me is that it actually rev itself up to that much.

I wonder if the battery jump really did mess up the PCM and I should do a battery disconnect.
__________________
2006 Solstice I4 2.4L "Kristin", Dark Tarnished Silver Metallic, 1SA+PCQ+G80+JL9+ZQ2+ZQ3
Mods: Kappasphere kappaATTIC, Kappasphere kappaShield, JPM Seatbelt Loops, FIAMM Freeway Blaster Dual, LED footwells, GMPP CAI

2006 G6 SE V6 3.5L Sedan "Sharon", Stealth Gray Metallic, 1SA+CF5+PCM+PDX - Sold but will not be forgotten... will always have a special place in my heart.

Life moves fast, don't miss a thing.
ToniCipriani is offline   Reply With Quote Quick reply to this message
Old 11-12-2012, 07:47 PM   #13 (permalink)
Member
 
ToniCipriani's Avatar
 
Join Date: Dec 2010
Location: Markham, ON
Just tried scanning, no codes. Couldn't try a battery pull, socket won't reach the neg terminal.

Gonna give it another try for another week to see if the blipping goes away.
__________________
2006 Solstice I4 2.4L "Kristin", Dark Tarnished Silver Metallic, 1SA+PCQ+G80+JL9+ZQ2+ZQ3
Mods: Kappasphere kappaATTIC, Kappasphere kappaShield, JPM Seatbelt Loops, FIAMM Freeway Blaster Dual, LED footwells, GMPP CAI

2006 G6 SE V6 3.5L Sedan "Sharon", Stealth Gray Metallic, 1SA+CF5+PCM+PDX - Sold but will not be forgotten... will always have a special place in my heart.

Life moves fast, don't miss a thing.
ToniCipriani is offline   Reply With Quote Quick reply to this message
Old 11-13-2012, 09:32 AM   #14 (permalink)
Member
 
TomatoSoup's Avatar
 
Join Date: Aug 2009
Location: Gaithersburg, MD
Quote:
Originally Posted by ToniCipriani View Post
Just tried scanning, no codes. Couldn't try a battery pull, socket won't reach the neg terminal.

Gonna give it another try for another week to see if the blipping goes away.
You can easily disconnect the battery at the underhood fuse box (under the red cap). You don't have to pull the actual battery cable.

Or easier still, if just resetting codes, pull the ECM fuses How To Remove The Ecu .
__________________
Owner of "Campbelle", a Brazen 2008 GXP ... with mods piling up...
TomatoSoup is offline   Reply With Quote Quick reply to this message
Old 11-13-2012, 02:02 PM   #15 (permalink)
Member
 
Join Date: Jun 2009
Location: San Francisco
Quote:
Originally Posted by ToniCipriani View Post
Update... still does 2K, but only on rare occasions where I am stuck in traffic. What worries me is that it actually rev itself up to that much.

I wonder if the battery jump really did mess up the PCM and I should do a battery disconnect.
One area to look at is the throttle shaft, one end has the actuator and bushing, the other end has a sealed bearing with a small end cap like a freeze plug. Any resistance in the bearing can cause the throttle from closing fully when the throttle pedal is released, thus causing a slow drop in RPM after the throttle pedal is released just enough where the ECM cannot detect a code from the throttle actuator.

Remove the throttle assy from the intake manifold. Slowly open the throttle blade and release it watching it close, see how far the blade closes should close completely without any resistance, if there is any slight resistance in the throttle blade from closing all the way there is a good possibility that the bearing is dried out of grease and possibly corroded from moisture.
You can drill a small 1/8 in. hole in the plug and add some type of lubricant to the bearing and seal it with a dab of silicone.

I had the same situation before and in time has progressively worsened to the point my car went into limp mode.
I dismantled the Old assembly for investigation and found that the bearing was 50% corroded out.

Hope this helps.
__________________
----------------------------------------------------
2007 GXP ....=)
Werks 50 trim, tubular Manifold, Highflow cat, Tial 38mm Wastegate, Intercooler, Radiator, IC pipes, Recalibrated Werks ECM

Gmpp kit, Gm CAI
MagnaFlow 3" Exhaust
AEM methanol
Synapse BOV
N.O.S ?
tincharriot is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Pontiac Solstice Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -6. The time now is 11:59 PM.



Powered by vBulletin®. Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.3.2
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.