Engine Vibration - Pontiac GTO Forum
User Tag List

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 20 (permalink) Old 10-27-2004, 04:30 PM Thread Starter
 
Join Date: Oct 2004
Posts: 70
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Engine Vibration

I just got mine a few days ago and wondered if it is normal to be able to feel engine vibrations from inside the car? Has anyone else had this problem?
DrFix2Fly is offline  
Sponsored Links
Advertisement
 
post #2 of 20 (permalink) Old 10-27-2004, 04:43 PM
 
Join Date: Oct 2004
Posts: 44
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I don't feel a vibration in mine but something that I wasn't used to was the big V8 making the car wobble a little when I am stationary at idle. I think that is really cool though. Can't help you with the vibration.
rcline33 is offline  
post #3 of 20 (permalink) Old 10-27-2004, 06:24 PM Thread Starter
 
Join Date: Oct 2004
Posts: 70
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I think you may be feeling the same thing I do. Call it a "wobble" or "shimmy" it seems to be at idle, almost like the car wants to get going and is getting impatient or something. Sounds like we both have the same symptom so maybe it's normal. I called the dealer's service department and asked them if they had any other complaints of this and they said there are too few of these out there and they are too new to tell if this is "normal." He will call GM and find out if anyone else has complained and what GM's disposition is. Could be the cam grind for all I know.
DrFix2Fly is offline  
 
post #4 of 20 (permalink) Old 10-27-2004, 07:38 PM
 
Join Date: Sep 2004
Posts: 98
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
lumpy idle

Yes the engine has a "lumpy idle". It's aV8 !!! it's a performance V8 !!! It's not a Buick. I'm not being a smart %^& well maybe a little. But the bottom line is there is no crossover tube in the exhaust. That helps balance backpressure from side to side and also lessens a lumpy idle. But you lose that old time exhaust note when a crossover is added to any exhaust.The GTO tries to bring back the old exhaust note of true dual exhausts. Also the LS1 does have a performance CAM. More overlap than a "BUICK", or any other common sedan. More overlap at high RPM is a good thing, at idle it makes the idle lumpy. I remember old high lift cams that if you could keep it idling within 300 rpm it was good enough. GTO's are great cars, BUT they are also MUSCLE CARS make no mistake. If you were expecting an AMG Mercedes type muscle it is NOT !! It's refined and has real suspension ( I'm somwhat suprised someone isn't complaining about the ride ) but it is going to let you KNOW it has a V8 performance engine under the hood. Many folks may have forgotten what a Muscle cars was or maybe many never did know, but I remember and the GTO is a very nice muscle car AND the LUMPY IDLE is part of it's Character.(Beach Boys said " Iv'e got a fuel injected engine sittin' under my hood.")

We have become so accustomed to the modern engines that have been refined so you don't even know the engine is running, if that's what you were expecting you may have purchased the wrong car. LUMPY IDLE is common in all GTO's.

And from Ronny and the Daytonas "When I turn it on, wind it up, blow it out GTO."
GTO TOO is offline  
post #5 of 20 (permalink) Old 10-27-2004, 08:09 PM Thread Starter
 
Join Date: Oct 2004
Posts: 70
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanks for the great reply. I'm not complaining at all. I think it's cool that my car feels "alive." My concern was more about proper balance and engine wear. I didn't even consider the function of the crossover pipe causing this. I will post what the dealer learns in about a week.
DrFix2Fly is offline  
post #6 of 20 (permalink) Old 11-03-2004, 05:47 PM Thread Starter
 
Join Date: Oct 2004
Posts: 70
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
As promised I am posting the dealer's disposition about my engine "vibration" or "wobble" sensation. The manager and tech told me it was "normal" especially with such a large engine in a relatively small car. I'm not sure if I am buying this, but it could be true. His data base reavealed no other customer complaints of this nature. I still want to know if anyone else gets the feeling like it's really windy out when you are at idle. Normal is when it is like that with all the cars.
DrFix2Fly is offline  
post #7 of 20 (permalink) Old 11-03-2004, 06:41 PM
 
Join Date: Sep 2004
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Mine does the same thing but it doesn't bother me.
Skidmark is offline  
post #8 of 20 (permalink) Old 11-03-2004, 07:10 PM
 
Join Date: Aug 2004
Posts: 63
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Same thing here and its a "good" thing!
2004 GTO is offline  
post #9 of 20 (permalink) Old 11-03-2004, 07:19 PM
 
Join Date: Sep 2004
Posts: 28
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yes, lumpy idle is good!

Mine does the same. I test drove 3 of them and they all had it.
Jag Flash is offline  
post #10 of 20 (permalink) Old 11-04-2004, 12:17 AM
 
Join Date: Nov 2004
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
WE have had the same feel in an LS-1 and LT-1 vette. It's a big engine/hi out put thing. I love that feeling of havein my teeth chatter the stop light.
NEW2GTO is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 2004-2006 GTO > Service, Maintenance and Technical Discussion

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO 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:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome