i went in to have my flowmasters put on and when i went to pick up my car he told me that i have a leak in my resonator i was also going to have im do my ubend replacement but he didnt have time and he said he was going to wait until i figure out what i want to do with my res. any ideas of what i should do..

also this guy must like me or something because he made an all new y pipe and gave me another set of original tips and he set it up so i can take off the tips and put on aftermarket ones if i want to ... it did all of this for only $80

I would change it but put the stock resinator put back in. Unless you wan tto go with g glass pack. Either way you go I would put something there, b/c the drowning will kill you.

Yeah if you like it loud, put a straight pipe in there.

i have no resonator. the drone isnt bad at all. jsut put a pipe in there

leave the resonator in...

i dont want the droan... i just have my flowmasters installed now ... and i will do a u bend deleate and then i will see what he can do about the res. because i would like to leave it in place

Hey guys im new to this, and ive been having a similar problem i think, when i accelerate from any speed or from take off, my exaust seems to have a gargling noise, now i thought it might be the torque converter, but can it be, its a 2000 gtp and i bought it last fall for 14,000, at 54k,is this the same problem you are having, like say you are driving beside a gard rail or a wall, and you accelerate it has like a gargling sound? the only way it doesent do that is if i really punch the pedal. If it isent the same situation can anyone please help me figure this out.

wow. thats a new one on me. I'll be watchin this thread now. Am I understanding the sound? Your exhaust has a tone similar to a V8 with a wild cam? Oh, and welcome aboard, BTW. great buncha peeps on here. Use Hercman's website.

Check under you car and check out that exhaust sytem. See if you have some aftermarket work done. Then if so, check out those areas. Does the gargle sound good or not good? Mine rumbles at 20-40% throttle. But I think mine is alright. Sort of hard to figure what your sound is like.

Gargling is a good word to describe an exhaust leak. Check where the flanges are. Maybe get a DP/u-bend delete while your under there! lol

Welcome to the site!

Hey guys, ya i have thought about the u-bend delete, sounds to me that that is what it might be, fingers crossed, its just too bad you know, i bought this car in great shape in toronto, Im Canadian by the way, lol, anyways i drove down all the way from ottawa, 6 hours just to buy it, they will never make gp's like this anymore, and it had only 54,000k,and the couple that owned it i think were from Kansas, so no salty roads or snow, but its brown, very ugly, but i can always paint it, WHITE, 4 door, fully loaded, i had a 97 2 door fully loaded gtp and i wouldent want any other car, ive wanted a grand prix since i was about 12 years old, so if anyone is a gp's freak, its me, im trying to learn how to do all the work myself without my uncles and grandfathers help to show i can manage just fine alone, but its hard, but anyways back to the problem, its like in a standard car, when you pull out to pass someone and you dont down shift it bogg's out, and gargles not rumble, it gargles,there is a guy next door who's 98 bonneville does the exact same but his is worst, when we take off you can really hear it, unless you really punch it, then there is no gargling, so my options are either my converter is clogged, but my car doesnt over heat, YET, or tourqe converver, im hoping its just the u bent, but i do have lots more to talk about, lots of mods i want to dicuss, im putting them all on in the next week, just want to know what you guys think, if anyone cares to get into a deep chat about this awesome car pontiac made, lol, get back to me, i do need some help.

as stated before, 4 doors FTW! Gigan-door (read that as gigantor) is really hurtin these days! Sorry to threadjack. back to the topic at hand...

If you can, raise and support the car on jackstands, then check for loose heat shields and "thump" the catalytic converter with a rubber mallet, or the heel of your hand (with the car cold, of course.. ). If the catalytic converter is broken inside, you should hear a rattling sound.

I'm trying but i just can't fathom a gargling sound ,try another term to explain the sound .Chico.

Thats it, its just like there is a lose of power, maybe its the crappy exaust on these gp's i dont know, but its like when you dont down shift to pass, the exaust just boggs down and gargles you here it on most cars now a days, just sound like my grand dads truck, the exaust is way past done and it rattles all the time now, but my exaust cant be done, 87.000k i dont know what to do, that always happens, i always hear and feel the things wrong with my car but noone else can because they dont drive it everyday like i do, i hear every ping, and grind and it drives me crazy, so thats why im trying to study up on grand prixs more so i can diag the problem myself, but there can be many options. i just got home and it was doing it really bad tonight its getting worst everyday, say im driving like 30kmh canadian here! and i accelerate it will start to bogg out alittle and gargle, so then i really press the gas and get it to shift then its fine, some people really think its the tourqe converter, but can it be at 87.000k, and it was an old couple who stored it in their garage before me, hardly used, why am i having problems like this, what do you guys really think its, and could it be the TC? if so how big of a job to fix that, cuz some times it picks up and goes but other times its dead. and i keep it extreamly well maintained, So TC? or u-bend? not my heat sheild i removed it already.

This bog your experiencing is normal and can be cured with an aftermarket PCM ,you are getting TC lockup at low speed and its just like driving a standard in to high of gear and trying to hit the gas without downshifting,try this when you go to accelorate lift your foot off the gas just a little then step down it should shift you down a gear and provide smooth going .Chico.

Hi GRANDTOURING,
I noticed your profile listed these mods: Hypertech PowerStat Thermostats, Digital Horsepower PCM, Fenderwell Intake, 3.4
I'm just thinking that if you've already done these, and still have your stock downpipe, cat, and u-bend, that could be your problem...

x2, you car is probably knocking so bad that its slow!

You need to get that things scanned, then throw on an exhaust d/p and ubend delete, scan it again, and get it tuned! You'll be happy then! My first major mod was getting rid of that ubend.

x4 on the exhaust.

THIS IS EXTREAMLY LONG REPLY BUT REALLY DESPRITE FOR SOMEONE NICE TO HELP ME Thats exactly how i discribed it, no downshift. and i have already bought a dh pcm second hand but updated, but have not installed it yet, i had mentioned before i bough some parts from PFYC, a 3.4 pully and a 3.2 pully just to have maybe change in the future, im going with the 3.4 for now, gator back v-belt's, speedbuilt fenderwell intake, which is already installed, and a 180 degree thermostate. and im about to purchase the straight pipe to replace the u-bend, and some coolant, give er a nice coolant flush, i have already replaced fuel filter, and pump, ignition coil, two plug wires, and air intake. BUT!, i heard that if you add an air intake, new pcm, thermostate, and what ever else, that it could make my problem even worst, but then again what is the problem, could be 10 different things, i stayed up till 3am this morning doing research trying to figure out what it could be, but the symptoms i have listed a few possibilities, here they are,

TOURQE CONVERTER
SPARK PLUGS (ive already changed)
FUEL INJECTION SYSTEM ADJUSTMENT
FUEL FILTER (ive already changed)
FAULTY SPARK PLUG WIRES
INTAKE MANIFOLD AIR LEAK
VACUMM LEAK
DEFECTIVE/NOT FUNCTIONING RIGHT ECM
FAULTY COILS (could be did change one when i first bought it last fall, coil tower was rusted)
BRAKES BINDING (everytime i start the car and put it in gear and start moving there is always a quick rubbing sound in the front like when anti-locks activated the sound it makes it the same is this normal?)
TRANNY FLUID LEVEL INCORRECT (well in the tank its about an inch over the top line and stays there, so i think! and the dip stick is fine, smells fine, looks fine i replaced the tranny twice in my 97 gtp so i know what to look for and listen for so i dont think its my tranny, this is why i need to see if it is the TC cuz if it is then it will frig my tranny right?)
LOW OR UNEVEN CYLINDER COMPRESSION PRESSURE
CARBON IN COMBUSTION CHAMBERS
DAMAGED IGNITION COMPONENTS
THROTTLE VALVE (is what i thought it was from the start)
SHIFT LINKAGE
TRANSAKLE MOUNT
EXAUST LEAK/NOT SEALED

see now guys, this is what im talking about, now you see how crazy this is driving me, like im obsessed with this car, all my money is in this car, i know i said too much but i really really need help, i know what everything is that i metioned and how to fix it, but which one is it? if i can fix this problem my gp would be perfect. its getting worst everyday, cant take it to the dealer cuz they frig ya, anyways if someone out there really wants to help me with this, it is very important to me, and im adding my mods next week so i need answers, BADLY! ill even pay for help at this point, all ive evr wanted was my grand prix growing up and now i have my second but its just not working out for me. ok ill shut up now, im just looking for some help. Thanks for taking the time to read this who ever did.

Can you first post up a sig saying what exactly you have installed other than what you have. It is confusing. If you have mods, like a 3.4 on there, that create more power and don't have any exhaust work done to eleviate the extra boost, then that could be the problem. You could be experiencing the clogged cat also.

ive installed my speed built fenderwell intake and thats it so far

if anyone here is still willing to try and help me after that insane long message i left, LOL,you's must think im nuts, anyways, anyone get back to me ok,

grahamdavis@sympatico.ca

Try using your new PCM, it really does sound like something "normal" with stock GPs. Make sure you have a tank full of 91 or higher octane gas before you do though.

PCM will just make it worst, i might have a TC problem, and many many more possibilities, i dont want to add anything more before i find out what is wrong with my car, had to sell my last 97 gtp after 2 tranny replacements dont want to go through that again, i just posted a new chat topic for this problem only, come check it out if you are interested, if not thanks anyways for your opinion.

so what do people think i should do ... should i put in a new resonator or should i just take out the old one and put new pipe in there. maybe i could run 3"dp along with 3" pipe back to my y pipe... i just dont want the droan inside the car to be extreamly bad

With FM's I would go with a res. or a glasspack if not you'll have droan coming out the wazoo.Chico.

Keep the stock muffs and do all the rest.

i allready put the FM on i dont want to pay and switch them out... i might put in a 3" dp and 3" Res any ideas on how that would sound