Pontiac Grand Prix Forums : Grandprix
 

Grand Prix Forums is the premier Pontiac Forum on the internet. Registered Users do not see the above ads. Please Register - It's Free!

Pontiac Grand Prix Forum - Welcome Register today! Contact us!

Page 1 of 3 123 LastLast
Results 1 to 20 of 51
  1. #1
    SE Level Member
    Join Date
    Oct 2017
    Location
    washington
    Posts
    17
    Chats
    0

    Default 05 Grand Prix GTP : Boat with fake supercharger??????

    So I just got this grand prix gtp with 140k miles on it .

    The engine seems to run fine and stuff but im trying to determine exactly how bad this thing needs new shocks and struts, it feels like a boat and has weird sideways body roll when going over certain bumps is this thing supposed to handle nice and tight or is it normal for it to feel like a boat?

    Also apparently this car has a 3.8L supercharged V6 but I wouldn't be able to tell honestly . Is there something wrong with this car or no.

    Thanks

  2. #2
    GT Level Member
    Join Date
    May 2017
    Location
    Dirtyzville, Mizzery
    Posts
    311
    Chats
    654

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    It's a fat FWD sedan.

    You can tighten up the suspension with better shocks/sways/mounts/springs, etc...but it's still going to plow corners.

    As for the supercharger...I mean it's a mid to high 14 second car on it's best day, stock. It's not the fastest thing on the planet by today's standards. Put a cone filter on the MAF sensor and you'll be able to hear the supercharger. They're pretty quiet, stock.
    1999 Chevrolet Silverado K1500 Classic Z71 - Intake/Gibson Exhaust - The Daily
    2004 Chevrolet Corvette MRM A4 - AFE S2 Intake/TSP Catless LT's/3" ORX/C6 ZR1 Wheels/Exhaust Tips
    Sold WBody's: '98 GT, '98 GTP, '00 GTP, '03 GTP, '05 GXP

  3. #3
    SE Level Member GrandPrixGT1's Avatar
    Join Date
    Jan 2017
    Location
    Mount Airy, MD
    Posts
    70
    Chats
    127

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    Open the hood. The engine cover will say atleast supercharged on it. Series 3 supercharged I think is what they say. If thereís no engine cover itís not exactly hard to find the supercharger. Itíll probably be the first thing you see.


    Sent from my iPhone using Tapatalk

  4. #4
    Donating Users industrialfish's Avatar
    Join Date
    Oct 2011
    Location
    Toledo, OH
    Posts
    1,277
    Chats
    956

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    At 140k it's probably looking ready for new suspension even if it's been done on time previously.

    The sideways roll on bumps could be a bent rear trailing arm.
    2005 GTP - Graystone Metallic|SPO grills&spoiler/SE lip/Carbon Fiber INFERNO hood
    7"
    Spectre|3.4 MPS|42lb Blue Giants+E85+Walbro 450lph pump
    SpeedDaddys|AL605|Vogtlands on FE3s|Vinnie's Spacers on solid lowers|Intense poly uppers|
    Dorman + Addco sway bars|Drilled/slotted rotors|Plasti-dip 17" QP2 at +27 offset

  5. #5
    SE Level Member
    Join Date
    Oct 2017
    Location
    washington
    Posts
    17
    Chats
    0

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    wtf is the deal with getting these cheap ass full strut/coil assembly pairs for 18inch wheels ? Seems hard to find.

    Then these on amazon , it says they fit an 05 GTP but then it doesn't mention anything about wheel size . Im thinking they probably don't actually fit my car .
    https://www.amazon.com/gp/product/B0...KPDHE2JH&psc=1

    How are you guys buying a pair of strut/coil assemblies for the same price as 1 assembly , like I see on PartsGeek they have the assemblies I need but only single units for $120-150. Even then they only have rears no fronts for 18"
    https://www.partsgeek.com/catalog/20...pring_assembly

    Lol why would you even get 18's for this car anyways all it does is reduce low end torqe I wish this car just had 16s on it
    Last edited by 5am; 10-16-2017 at 08:49 PM.

  6. #6
    GrandPrix Junkie SgtMarshal's Avatar
    Join Date
    Feb 2012
    Location
    Kemmerer, Wyoming
    Posts
    4,182
    Chats
    31997

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    the 2005 gtp came stock with 17's, if I remember right. 18's aren't much bigger. the only reason they wouldn't work is if you have a wheel that's too wide.

  7. #7
    Donating Users industrialfish's Avatar
    Join Date
    Oct 2011
    Location
    Toledo, OH
    Posts
    1,277
    Chats
    956

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    It's just poor definitions using wheel size.

    18" should be GXP only struts.

    If you have 16" wheels you likely don't have the sport suspension etc.

  8. #8
    Donating Users Slick2500's Avatar
    Join Date
    Oct 2010
    Location
    Box Elder, South Dakota, United States
    Posts
    7,416
    Chats
    49401

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    Quote Originally Posted by SgtMarshal View Post
    the 2005 gtp came stock with 17's, if I remember right. 18's aren't much bigger. the only reason they wouldn't work is if you have a wheel that's too wide.
    I thought they were 16s. And the GXPs were 17s.

    -Edit- Wow I guess I never really payed enough attention to the 7th gens.
    2003 Redfire Metallic Chevy Tahoe Z71 - Airaid Modular Intake Tube, Flowmaster Exhaust.
    Quote Originally Posted by The Sunfire Guy
    Superchargers take away horsepower

  9. #9
    Donating Users industrialfish's Avatar
    Join Date
    Oct 2011
    Location
    Toledo, OH
    Posts
    1,277
    Chats
    956

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    05 could have 16s or 17s based on trim, GXP is 18s

  10. #10
    SE Level Member
    Join Date
    Oct 2017
    Location
    washington
    Posts
    17
    Chats
    0

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    haha yeah you're right then the number on my tires indicates they are 17's . first i used a tape measure , i don't know where the fk your supposed to measure from because not even measuring rubber to rubber the diameter looked like 19 or more .

  11. #11
    Donating Users industrialfish's Avatar
    Join Date
    Oct 2011
    Location
    Toledo, OH
    Posts
    1,277
    Chats
    956

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    Quote Originally Posted by 5am View Post
    haha yeah you're right then the number on my tires indicates they are 17's . first i used a tape measure , i don't know where the fk your supposed to measure from because not even measuring rubber to rubber the diameter looked like 19 or more .
    You can't. It's the diameter of the inside bead behind the lip. Which is why it's on every tire sidewall.

    So literally any shock will fit as long as it's not "FE4", or "GXP", or "18" wheel only". (Which are all the same)

  12. #12
    Donating Users industrialfish's Avatar
    Join Date
    Oct 2011
    Location
    Toledo, OH
    Posts
    1,277
    Chats
    956

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    Also, this recent thread we were just discussing how to ID what suspension your car came with.

    http://www.grandprixforums.net/threa...kes)?p=1481068

    Yours should be FE2.

  13. #13
    SE Level Member
    Join Date
    Oct 2017
    Location
    washington
    Posts
    17
    Chats
    0

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    seems to get pretty bad gas mileage along with not seeming to roll as well as a car should. maybe it needs an alignment. hard to tell im not that smart. tires don't make any funny noise though .

    untechnically speaking , my previous car (Subaru svx ) just seemed to want to roll or move easier , its not because of weight difference they are both about 3500lbs. maybe its how the transmission is geared . hard to tell if wheel bearings need to be replaced . the display does keep showing (service ABS ) and (service traction control). I think the dealership I bought it from needs to pay me some money back lol.
    Last edited by 5am; 10-19-2017 at 12:03 PM.

  14. #14
    GT Level Member
    Join Date
    Sep 2015
    Location
    Cheyenne, WY
    Posts
    291
    Chats
    17

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    "I think the dealership I bought it from needs to pay me some money back "

    Oh yeah...That's gonna happen.
    2007 Antique Bronze Metalic Grand Prix GT...bone stock.

  15. #15
    SE Level Member
    Join Date
    Oct 2017
    Location
    washington
    Posts
    17
    Chats
    0

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    buying used cars is honestly pretty annoying , you need to notice everything wrong right away and then have a rough idea of how much it costs to fix each then be good at haggling . You need to drive something around for maybe a whole day or two to make a good decision, but cant .

  16. #16
    GT Level Member
    Join Date
    May 2017
    Location
    Dirtyzville, Mizzery
    Posts
    311
    Chats
    654

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    I'd never buy a car with those obvious issues; but that's just me.

    99% of the time it needs a hub assembly because you can't just replace the sensor in it. That'll usually fix the service light issue there.

    Otherwise if the car feels "gutless", it probably needs LIM gaskets, has a vacuum leak, or the converter is starting to clog (all common issues). It should be much faster than any SVX.
    1999 Chevrolet Silverado K1500 Classic Z71 - Intake/Gibson Exhaust - The Daily
    2004 Chevrolet Corvette MRM A4 - AFE S2 Intake/TSP Catless LT's/3" ORX/C6 ZR1 Wheels/Exhaust Tips
    Sold WBody's: '98 GT, '98 GTP, '00 GTP, '03 GTP, '05 GXP

  17. #17
    Donating Users Slick2500's Avatar
    Join Date
    Oct 2010
    Location
    Box Elder, South Dakota, United States
    Posts
    7,416
    Chats
    49401

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    It could just need a basic tune up, and the maf cleaned as far as the performance loss and bad gas mileage. I would do all new fluids, oil, trans, coolant ect, plugs, wires, and fuel filter. My 01 ran like a dog when I first got it, until I changed out the fuel filter.
    2003 Redfire Metallic Chevy Tahoe Z71 - Airaid Modular Intake Tube, Flowmaster Exhaust.
    Quote Originally Posted by The Sunfire Guy
    Superchargers take away horsepower

  18. #18
    Donating Users industrialfish's Avatar
    Join Date
    Oct 2011
    Location
    Toledo, OH
    Posts
    1,277
    Chats
    956

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    You are running 93 octane right?

  19. #19
    SE Level Member
    Join Date
    Oct 2017
    Location
    washington
    Posts
    17
    Chats
    0

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    Quote Originally Posted by industrialfish View Post
    You are running 93 octane right?
    yeah

  20. #20
    SE Level Member
    Join Date
    Oct 2017
    Location
    washington
    Posts
    17
    Chats
    0

    Default Re: 05 Grand Prix GTP : Boat with fake supercharger??????

    Quote Originally Posted by blueguy91 View Post
    I'd never buy a car with those obvious issues; but that's just me.

    99% of the time it needs a hub assembly because you can't just replace the sensor in it. That'll usually fix the service light issue there.

    Otherwise if the car feels "gutless", it probably needs LIM gaskets, has a vacuum leak, or the converter is starting to clog (all common issues). It should be much faster than any SVX.
    Huh alright.

    And yeah if im keeping this thing im definitely going to replace the cat and mufflers because you can tell the engine sounds pretty sick.

    Quote Originally Posted by Slick2500 View Post
    It could just need a basic tune up, and the maf cleaned as far as the performance loss and bad gas mileage. I would do all new fluids, oil, trans, coolant ect, plugs, wires, and fuel filter. My 01 ran like a dog when I first got it, until I changed out the fuel filter.
    This is my first car with OBD2 , be easier to look at all the sensors and computer stuff , I ordered one of those Bluetooth obd2 things .

Page 1 of 3 123 LastLast

Similar Threads

  1. Replies: 2
    Last Post: 09-17-2014, 04:55 PM
  2. Replies: 0
    Last Post: 09-15-2014, 05:14 AM
  3. Replies: 5
    Last Post: 08-27-2014, 10:22 PM
  4. Replies: 0
    Last Post: 07-11-2014, 07:30 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •