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 2 12 LastLast
Results 1 to 20 of 24
  1. #1
    SE Level Member
    Join Date
    Sep 2016
    Location
    Warrior, AL
    Posts
    24
    Chats
    0

    Default Possibly Clogged Converters?

    Ok so here's the deal we have a 2004 Grand Prix GTP that ran perfect when we got it, we'll it started acting up and they (it's my sisters car) took literally like 6 months or so to get the proper plugs for it which stopped the horrible misfire but the deal is that the car still doesn't seem to have the power that it used to and we reset the computer codes using the battery but the CEL is still on just no longer flashing, the car has a lot of power as it is but I'm thinking that maybe the CATS are plugged? We tried reading the codes but it never has let us it loads and then gives a loading error.

    Sent from my SPH-L720T using Tapatalk

  2. #2
    GTP Level Member
    Join Date
    Apr 2012
    Location
    Las Vegas, Nv
    Posts
    612
    Chats
    3

    Default Re: Possibly Clogged Converters?

    Good news, your cats are not clogged, bad news, your singular cat is clogged. Misfires destroy cats. Get your nearest exhaust shop to replace it.
    GPONA #1 Cyber Bully

  3. #3
    SE Level Member
    Join Date
    Sep 2016
    Location
    Warrior, AL
    Posts
    24
    Chats
    0

    Default Re: Possibly Clogged Converters?

    That's what I was thinking and sorry wasn't sure if it was singular or plural, but knowing our ways we'll probably just knock the combs out of it if that doesn't work we'll get a new one and thanks for the response

    Sent from my SPH-L720T using Tapatalk

  4. #4
    I live here. stealthee's Avatar
    Join Date
    Mar 2011
    Location
    SWPA
    Posts
    8,606
    Chats
    33

    Default Re: Possibly Clogged Converters?

    Why did it take 6 months to get the right plugs? Any parts store is going to carry what you need.

    2007 Pontiac Grand Prix GT - Daily driver. ZZP 3" catted downpipe and intake
    1994 Dodge Stealth - Currently being revived. Modded

  5. #5
    GTP Level Member 99GT2dr's Avatar
    Join Date
    Dec 2007
    Location
    Cibolo, TX
    Posts
    540
    Chats
    117

    Default Re: Possibly Clogged Converters?

    Overnight parts from Japan. Don't arrive as fast as in the movies.
    '11 Suburban LTZ
    '99 SSEi
    '99 GT
    '09 G8 GT

  6. #6
    Admin blueguy's Avatar
    Join Date
    Jun 2008
    Location
    Dirtyzville, Missery
    Posts
    31,404
    Chats
    77762

    Default Re: Possibly Clogged Converters?

    lol wut.

    Autolite 606's. Gap the plugs @ .050" and never worry about them.

    Get generic lifetime warranty plug wires, and clean the coil pack terminals as well.

    Get a 2.5" or 3" catted downpipe from ZZPerformance. Take it to a shop and have them install it if you can't with a jack and hand tools. It'll be cheaper anyways.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI

  7. #7
    SE Level Member
    Join Date
    Sep 2016
    Location
    Warrior, AL
    Posts
    24
    Chats
    0

    Default Re: Possibly Clogged Converters?

    Ok so recently as in like the last 2 days the car has started spitting and sputtering again and one thing that I would think points to the converter being melted is that it constantly tries to overheat on the interstate or just idling and this is with the heat at FULL BLAST, but if your coasting down a back road with the heat at about half it runs at normal temp. It's also back to where 9/10 times when you crank it up you have to give it gas for a second to keep it running

    Sent from my SPH-L720T using Tapatalk

  8. #8
    GTP Level Member
    Join Date
    Apr 2012
    Location
    Las Vegas, Nv
    Posts
    612
    Chats
    3

    Default Re: Possibly Clogged Converters?

    Replace the catalytic converter.
    GPONA #1 Cyber Bully

  9. #9
    SE Level Member
    Join Date
    Sep 2016
    Location
    Warrior, AL
    Posts
    24
    Chats
    0

    Default Re: Possibly Clogged Converters?

    Quote Originally Posted by blackspike2710 View Post
    Replace the catalytic converter.
    Where is the catalytic converter on this car, I'm really hoping it directly unbolts like my 99 Honda it was a big enough pain just getting that one off lol

    Sent from my SPH-L720T using Tapatalk

  10. #10
    I live here. stealthee's Avatar
    Join Date
    Mar 2011
    Location
    SWPA
    Posts
    8,606
    Chats
    33

    Default Re: Possibly Clogged Converters?

    The cat is part of the downpipe.

    2007 Pontiac Grand Prix GT - Daily driver. ZZP 3" catted downpipe and intake
    1994 Dodge Stealth - Currently being revived. Modded

  11. #11
    Admin blueguy's Avatar
    Join Date
    Jun 2008
    Location
    Dirtyzville, Missery
    Posts
    31,404
    Chats
    77762

    Default Re: Possibly Clogged Converters?

    ^^That.

    Quote Originally Posted by dbest1197 View Post
    Ok so recently as in like the last 2 days the car has started spitting and sputtering again and one thing that I would think points to the converter being melted is that it constantly tries to overheat on the interstate or just idling and this is with the heat at FULL BLAST, but if your coasting down a back road with the heat at about half it runs at normal temp. It's also back to where 9/10 times when you crank it up you have to give it gas for a second to keep it running

    Sent from my SPH-L720T using Tapatalk
    Quote Originally Posted by blueguy View Post
    lol wut.

    Autolite 606's. Gap the plugs @ .050" and never worry about them.

    Get generic lifetime warranty plug wires, and clean the coil pack terminals as well.

    Get a 2.5" or 3" catted downpipe from ZZPerformance. Take it to a shop and have them install it if you can't with a jack and hand tools. It'll be cheaper anyways.
    Did you read this?

    Or did you just not read it?
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI

  12. #12
    SE Level Member
    Join Date
    Sep 2016
    Location
    Warrior, AL
    Posts
    24
    Chats
    0

    Default Re: Possibly Clogged Converters?

    I did but my sister just decided to get rid of the car, it was running perfectly fine this morning around 6 am it had loads of power, actually didn't try to get hot on me, no problems at all, well she was on her way to come get me from work and the car she said wouldn't start for the longest time it would just spin over, well it cranks up now but is showing "Reduced Engine Power", I've literally never seen a car with so many issues in a one year time span, I personally love the car but not enough to be constantly fixing stuff on it, especially when I had an accord 2.3 that was 5 years older with 368,xxx miles on the original engine and transmission, the only problem that car ever gave me was my battery going out that's literally the one and only issue and I drove that little Honda pretty hard my sister drives the GTP like a soccer mom, I don't see a reason for the AT LEAST 6 major issues this car has had in a year.

  13. #13
    SE Level Member
    Join Date
    Sep 2016
    Location
    Warrior, AL
    Posts
    24
    Chats
    0

    Default Re: Possibly Clogged Converters?

    Btw, there were about 11 hours in between the time I drove it at 6 a.m. to the time she was supposed to pick me up which was 5:30 pm

  14. #14
    Admin blueguy's Avatar
    Join Date
    Jun 2008
    Location
    Dirtyzville, Missery
    Posts
    31,404
    Chats
    77762

    Default Re: Possibly Clogged Converters?

    They're known issues and the car was apparently neglected and had the sh1t run out of it.

    Failing converters, vacuum leaks, typical tune up like plugs/wires/PCV/fluid/filters is all a common thing. But continuously driving a car with known problems is hysterical to the max.

    Don't blame the car for beating it day in and day out and not taking care of it.

    It also doesn't make 67 horsepower like the Honda did, either.

    Solid ending.
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI

  15. #15
    GrandPrix Junkie Bronco Boy's Avatar
    Join Date
    Jul 2010
    Location
    Coquitlam,BC,Canada
    Posts
    3,041
    Chats
    1

    Default Re: Possibly Clogged Converters?

    Guess we will never know what the CEL was trying to tell you. LOL
    Chris B
    2002 GT

  16. #16
    SE Level Member
    Join Date
    Sep 2016
    Location
    Warrior, AL
    Posts
    24
    Chats
    0

    Default Re: Possibly Clogged Converters?

    No I guess not and yeah the Honda wasn't a fast car but there's no need to knock it, 148 hp in 2.3 liters on an SOHC, doesn't seem very bad at all to me for a family & economy based sedan, and yes I know they're bad on cars but that's not exactly the point, the rear sway bar mount literally broke on the right side while we were sitting still at a gas pump, the left side very soon after, the brake rotors were rusted through so bad that big chunks about the thickness of a quarter deep were taken out of them as we saw while changing the brake pads, the heater core hose or whatever the coolant hose is that's right below the supercharger pulley busted and was spraying water on the belts, the radio display doesn't work even since before we got the car, the OBD2 port has never allowed us to read the codes, the high fans will not kick on for some reason whatsoever, the dash display randomly pops up check fuel cap every other day and its on right everytime, the misfire issue which yes I know they took way too long to address but I tried putting similar plus in it that were brand new just temporarily until they bought the correct ones and had to swap back to the bad plus because the car started surging and backfiring after it warmed up yes it now had the right plugs along with new wires and it no longer misfires, the bundle of wires that lead out to the cars electronics from the Computer somehow weren't in their little clip so the entire bundle of wires in their black wrap were stuck between the supercharger belt and I Believe the coil packs or some kind of Mount there anyways it got wedged and I didn't notice until around 8 of the wires were nearly rubbed in half that needed to be fixed, the car didn't want to start what so ever yesterday, now it cranks and runs perfectly fine but is showing "reduced engine power" for some reason, although it does seem to have a slight surge when you're maintaining RPMS idk what it's doing now, I loved this car but Idk it is from the north after all, whole underside is rusted pretty good

  17. #17
    GT Level Member
    Join Date
    Nov 2015
    Location
    WI
    Posts
    156
    Chats
    0

    Default Re: Possibly Clogged Converters?

    Thought your sister got rid of it? So there should be no more issue to deal with?

  18. #18
    GrandPrix Junkie SgtMarshal's Avatar
    Join Date
    Feb 2012
    Location
    Kemmerer, Wyoming
    Posts
    3,634
    Chats
    21897

    Default Re: Possibly Clogged Converters?

    congratulations, you put 393 words in 1 sentence.

  19. #19
    SE Level Member
    Join Date
    Sep 2016
    Location
    Warrior, AL
    Posts
    24
    Chats
    0

    Default Re: Possibly Clogged Converters?

    No I said she has decided to get rid of it that doesn't mean it's already gone, and oh I'm sorry I didn't always very am A+ on my report cats for English like in just so sure you did cheatah faheatah, but oh wait look at that you would literally NEVER spell either of those words like that.

  20. #20
    Killa Bee Scottydoggs's Avatar
    Join Date
    Aug 2010
    Location
    new jersey
    Posts
    36,208
    Chats
    141486

    Default Re: Possibly Clogged Converters?

    Quote Originally Posted by dbest1197 View Post
    No I said she has decided to get rid of it that doesn't mean it's already gone, and oh I'm sorry I didn't always very am A+ on my report cats for English like in just so sure you did cheatah faheatah, but oh wait look at that you would literally NEVER spell either of those words like that.
    i suggest proof reading your posts before hitting the "post" button.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 3.0, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned by me. https://goo.gl/gpV5kW

Page 1 of 2 12 LastLast

Similar Threads

  1. Selling used catalytic converters
    By wags81 in forum Off Topic Discussion
    Replies: 6
    Last Post: 03-25-2014, 10:09 PM
  2. Stall Converters and Traction question.
    By Mad Max in forum 1997-2007 4 speed Automatic (4T65E) (4T65E-HD)
    Replies: 4
    Last Post: 01-22-2012, 03:26 AM
  3. ZZP torque converters...
    By Tengis in forum 1997-2007 4 speed Automatic (4T65E) (4T65E-HD)
    Replies: 0
    Last Post: 01-07-2009, 10:22 AM
  4. Torque Converters...Which one??
    By japslpr in forum 1997-2007 4 speed Automatic (4T65E) (4T65E-HD)
    Replies: 12
    Last Post: 10-01-2008, 04:10 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
  •