| 92_WhItE_H23 |
| For the last week or so my car has been making a really obnoxious humming sound whenever i coast at about 2500-3000rpm. its really loud.. anyways it only seems to happen between that rpm range doesnt matter what gear im in ..and once it starts humming if i blip the throttle it goes away until it falls back into that rpm range.. anyways today i finally got sick of hearing it so i popped the hood and tried to throttle it a bit.. i managed to hear it.. it seems to be coming from where my CAI leads to..right in the passenger side wheel well. Could my intake be making this racket??? keep in mind it hasnt done this AT ALL until the last week or so. I have also been experiencing random stalls as well. Its a 99 Supercharged prelude. any advice would be greatly appreciated.. i just dont want to take it into honda just yet incase it turns out to be something simple |
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| n0c7 |
To rule out your CAI, remove it and rev the car to see if the noise goes away. :dunno: Could be something as simple as the CAI loose.
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| 92_WhItE_H23 |
quote:
Originally posted by n0c7
To rule out your CAI, remove it and rev the car to see if the noise goes away. :dunno: Could be something as simple as the CAI loose.
can i just remove the filter and rev it a bit?? the sound is limited to the wheel well and when its making the noise the intake tube doesnt vibrate or anything.. but its definatly coming fromt he wheel well..right in the space where the CAI filter is. i just cant see anything else in that area that would make such a noise. specially while the car is stationary and theres no moving parts
but i also cant see the intake making a noise like that either ive never heard anything like that come from an intake before other then the annoying whistle from the intake i had on my ITR. but this noise is completely different it almost sounds like the exhaust has a hole... but it doesnt seem to be coming from the exhaust. |
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| n0c7 |
| You could remove the air filter, but to rule out the CAI you gotta pull it out. Could be possible that you have a vacuum leak, simple hose disconnected or maybe a hole in the CAI. It wont harm anything if you start the car without your intake just don't drive it or you'll be allowing "dirty" air and any debris picked up. |
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| ChromeDragon |
| You probably had to do some cutting for your cold air correct? Check and make sure none of the panels or the inner fender liner are scraping or vibrating against the intake. |
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| 92_WhItE_H23 |
Ok its definatly the Intake making this noise as i have found today. However im still unsure as to WHY its making this noise.. the intake isnt touching anything on the car and it seems to be creating a tuba like effect, once the vibration starts it just explodes into loud humming from the filter..
as well i cant seem to get it to make noise while the car is cold it seems to only do it after its been running for about 15 min. |
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| S2KPWR |
I'd say its definately a Vac leak.
Probably your IM gasket, cause you say it only does it when its warm... So expanding, cracks etc.
The intake will make alot of noise if you have a vac leak anywhere.
Do you have a boost gauge? are you loosing boost when its vibrating?
Take a can of WD-40 or brake cleaner and start spraying to find out where the leak is., I would check your IM gasket, all your vac lines running off your SC.
Maybe check your IAC valve to see if its leaking/sealing properly.
Clean out your TB.
Check your intake sensor/02 sensors.
I had a Supercharger on my old car, FI on stock engines can be frustrating, but fixable. |
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| 92_WhItE_H23 |
| the noise is produced at the filter.. im not understanding how a VAC leak would cause the noise at that point?? if one of my gaskets were gone wouldnt the noise be made there?? as for boost leak it doesnt seem as tho im loosing boost. i think my gauge is fucked tho but i did manage to get a 7lb read out of my boost guage today on a 4th gear pull. i wish i knew someone who knew what they were talkin about so they could just look at it and hear the sound im describing |
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| icydude |
it is possible your car hits a resonating frequency around that rpm range.....
its a stretch but alot of cars will do that on a highway when stabalized at a certain load/rpm point.
If you find nothing wrong it just might be this.
Check the diff as it might be a little dry. |
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| 92_WhItE_H23 |
quote:
Originally posted by icydude
it is possible your car hits a resonating frequency around that rpm range.....
its a stretch but alot of cars will do that on a highway when stabalized at a certain load/rpm point.
If you find nothing wrong it just might be this.
Check the diff as it might be a little dry.
it does this while parked tho too.. i open the hood and pull the throttle from under the hood and if i rev it to the right rpm it still makes the noise and then i ease off and it stays vibrating then i shoook the intake and the noise didnt go away or make any change.. so i stuck my hand down and made sure it wasnt touching anywhere and its not the intake is making the noise completely on its own.. the car isnt moving so it cant be any parts in the chassis |
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| S2KPWR |
quote:
Originally posted by 92_WhItE_H23
i wish i knew someone who knew what they were talkin about so they could just look at it and hear the sound im describing
Im telling you this because the EXACT same thing happened to my car.
Mine turned out to be fuel related, my car was getting too much fuel, (leaking injector) so my ECU tried to compensate with more air or something along those lines. You can check to see if your injectors are leaking by pulling your fuel rail, make sure the injectors stay in the rail, hold over a container of some sort, turn your keys to the accessory position, and see if they pour out. They should not.
Is your car producing more exhaust? different color? when your at those certain rpms? do you have a air/fuel gage? are you running rich or lean during these noises?
What your explaining could be alot of things...
Just try what I suggested. It will take an hour of your time. And cleaning your TB/IAC valve is good to do occasionally anyways. |
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| S2KPWR |
quote:
Originally posted by 92_WhItE_H23
the noise is produced at the filter.. im not understanding how a VAC leak would cause the noise at that point?? if one of my gaskets were gone wouldnt the noise be made there??
If you have a vac leak, your ecu will try to compensate for the lack of air, which would cause your intake to make a "sucking" noise.
What type of supercharger is it? do you have a bracket underneath it connecting to your block? If so, it could of rattled loose if it wasnt installed properly, which could cause a leak there, or cause your IM gasket to be damaged because the support is gone. |
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| n0c7 |
| Aaron, I hear carb cleaner is a better safer choice for finding vac leaks as opposed to WD40 and brake cleaner. Just FYI guys. |
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| S2KPWR |
quote:
Originally posted by n0c7
Aaron, I hear carb cleaner is a better safer choice for finding vac leaks as opposed to WD40 and brake cleaner. Just FYI guys.
haha i meant carb cleaner... wasnt thinking. lol brake cleaner. |
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| 92_WhItE_H23 |
| my air fuel is good..even when it makes the noise.. nothing funny happens to my guages at well when it occurs. I talked to the guy who built my car and he said something about how he put a larger filter on it before he sold it and hes heard it vibrate before just to make sure it wasnt touching the car anywhere... but ive had the car 2 months now and its only started this vibrating now. Ill try and get into a garage sometime soon to have a look at all the suggestions you guys have given me so far. |
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| Xx D-MAN xX |
| Is the filter touching anything in the wheel well? Is the CAI tube rubbing against the hole? Is the filter even on? |
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| 92_WhItE_H23 |
yea.. i pulled up on it and stuck my hand down and felt all around the filter.. it wasnt touching anything and i was holding it away from the hole. it was completely free of anything and still made the humming..
anyways it seemed to have gone away today.. its annoying when things come and go like that..hopefully it wont return tommorow.. if it does im going to teh car wash this weekend to fix my car haha |
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| charger_guy |
| well its comming from the side your belts are on?...could be a dry bearing in the alternator or any of the pulleys?.....water pump?.....power steering?....those might be some things to check...if its by the tranny it could be the pilot bushing or bearing.....hmmm....well hopefully it stays away |
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| 92_WhItE_H23 |
| no its on the opposite side of all the pulleys. and the sound is only so loud because its amplified by being produced in the closed wheel well on the front passenger side. there is absolutely no noise coming from the engine on top. |
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| charger_guy |
| so its on the tranny side? |
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| 92_WhItE_H23 |
| yes .. the sound is coming from the intake tho. im just trying to figure out why. im going to take the filter off this weekend and see if it helps and maybe put a new one on instead. or im going to switch to short ram...ill experiment this weekend. |
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| charger_guy |
| id have to hear it in real life...lol...im never good telling what the problem is ...unless i get to see the car in person lol |
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| S2KPWR |
I have an insulated garage with all the tools you'll probably need if you have no where to go.
I'm available to help out friday or saturday if you want. |
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| 92_WhItE_H23 |
a little update:
i pulled the intake right off.. and now the sound comes right from either the supercharger or the TB itself. the sound was just travelling down the tube which is why i was hearing it from the filter... im pretty scared now cuz as i have said before i know almost nothing of these types of systems except that this noise can mean no good. from what i know the noise can ONLY be heard when the car has been warmed up and driven for atleast 15 minutes. i checked as many of the hoses and lines as i could and none of them seem to be kinked or anything like that.. |
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| n0c7 |
| If you're not comfortable with working on the car then its time to find someone who knows their way around superchargers. S2KPWR has a supercharged RSX so he may be able to point you in the right direction. |
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| 92_WhItE_H23 |
| yea im not comfortable at all lol too many moving parts, too many variables. if its easy i dont mind letting someone touch it but if not i dont mind paying a shop to do it either.. if i knew how much it would cost.. |
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| S2KPWR |
quote:
Originally posted by 92_WhItE_H23
yea im not comfortable at all lol too many moving parts, too many variables. if its easy i dont mind letting someone touch it but if not i dont mind paying a shop to do it either.. if i knew how much it would cost..
You wont find many shops in the city who are familiar with supercharger issues, they know how to install them.. thats about it. Trust me, I've looked around. I'm not going to say the places where I brought it to, or inquired questions to, cause I dont want to put down any shops. Even dealerships wont be able to tell you whats wrong unless your car is throwing a code.. I brought mine to acura once, and paid 80.00 for them to tell me 1 of the 3 things that I already knew was wrong with my car.
Best idea is to do a search on your supercharger, and see if there are other people who have the same problems.
I cannot help you anymore since Im going away quite soon for afghanistan.
1 more thing I can suggest to check...
Look inside the inlet on your blower itself, Is there crystalized coolant dried inside? If there is, its your IAC valve leaking. May want to do a coolant bypass while your there. having coolant running to your TB is nice, but not worth destroying a blower over.
Again, check under the blower if there is a support bracket. Check to see if its secured properly, check gaskets.
You goto think what is straining since you got the SC installed, a sc will change your cars vac pressure, your air/fuel systems, temperature, and ignition. Which could mean alot of things... plugs, coilpacks, wiring, injectors, gaskets, timing, thermostats etc.
And you could try and reset your ECU and see if that helps. Could be as simple as that.
Thats all I can suggest for not seeing the car. |
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| S2KPWR |
And I had shops in edmonton ask me if I would do supercharger installs for them.
again not saying any names.
BTW (installing FI on NA cars is a never ending process) This is why I traded my car for a stock S2k. |
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| 92_WhItE_H23 |
ok so say i find a leak in a hose, how is this best remedied?? say a hose is loose and leaking from the connection..
or if a gasket is gone, do i need to order these gaskets from JR??? or can like that blue redigasket stuff work, that stuff in a tube. i think this is gunna be a DIY project for me so hopefully i come out of it more knowledgeable and with a working car lol. the first thing ill try is resetting the ecu something simple enough that i can do without help lol. |
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| S2KPWR |
If a vac hose is leaking, you could just try to snip the end of it off and re-connect it, if the end of the hose is damaged.
or just buy a new hose from canadian tire.
If your IM gasket is gone, buy a hondata gasket from Pro-drag, they are cheap.
I would highly recommend taking off your Throttle body and inpecting it/your IAC valve (Idle Air Control) and check for coolant leaks into your blower.
Jackson racing will just tell you to do what I told you in previous posts.
Also, Did you check to see if your sensors were all ok? the one on your intake and the 2 02's on your cat or before and after it whatever. |
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| 92_WhItE_H23 |
| wouldnt i throw a code if my sensors were out??? |
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| S2KPWR |
| more than likely you would get a CEL, but I would check anyways. |
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| 92_WhItE_H23 |
| ok well i got a warm garage and tools at my disposal on saturday at my friends shop where he works (construction not auto garage) im going to rip it apart and find out what i can based on the information youve given me thus far.. if i cant figure it out on my own im going to take it to a shop like pro drag and see if they cant figure it out for me. |
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| S2KPWR |
I'd say Pro-drag would be a good choice, or Apex. If your deciding to go that route.
Be prepared to pay for alot of shop time, since they are going to have to find out what exactly is wrong without a CEL code. |
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| Fish_e_o |
| just a random thought here but did you check that your motor mounts were secure??? i had a weird vibration at about 2-3 k and i was looking around and it turned out that the motor mount bolts backed out a little :dunno: i hope it helps |
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| S2KPWR |
quote:
Originally posted by Fish_e_o
just a random thought here but did you check that your motor mounts were secure??? i had a weird vibration at about 2-3 k and i was looking around and it turned out that the motor mount bolts backed out a little :dunno: i hope it helps
Thats probably a really good thing to check, never thought of that.
It would make sense to his symptoms. Especially if he is still running the stock mm's. He may need urathane mm inserts... Again, not too expensive at all. |
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| 92_WhItE_H23 |
no its definatly not that... its coming right through the throttle body. i wish i could record the sound.. im almost 100% certain its going to be my IM gasket or a leaking hose. i wont know till after this weekend however.
as well the sound NEVER comes until the car has been warmed up. if i let it sit and run for 15-20 min the car will make the noise even if havent moved the car at all. but it wont until its been warmed. As well, if i start the car and drive it cold, i reach boost very easily, after the car is warmed for the 20 min. it seems to struggle alot harder to reach boost.. ive hit 7lbs of boost when its cold but when its warm the most i can get is 4 or 5 |
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| Fish_e_o |
maybe once your im heats up it deforms???:dunno:
replace the gasket seal it up really good and tighten the bolts really well same with the tb.. takes an hour and costs only $30 tops might as well try:dunno:
and i would look at getting urethane motor mounts anyway you'll launch 1000X better..
well good luck finding out whats wrong... |
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| 92_WhItE_H23 |
| ill post what happens tommorow...ive printed all the feed back from this site and all the others ive posted on so im going to comb through everyones suggestions and ill post the results! thanks |
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| 92_WhItE_H23 |
| i put hose clamps on all the hoses that had none, i tightened all the bolts on the TB and on the charger. i tightened all the belts and i reset the ECU. Im getting into boost much faster and i seem to be boosting the full 7lbs now. Ive yet to hear the sound come back so im not sure if that is fixed but only time will tell me that. thanks to all those who replied! |
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| S2KPWR |
| did you use a torquwrench to tighten them? Hopefully you didnt overtighten or you can crack your IM. Jackson is very specific with their torque specs. |
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| 92_WhItE_H23 |
| no. some of them i could easily turn by hand. so i just tightened them, i didnt crank on them.. i dont have a torque wrench so im unsure of the lb i used. and it was mostly the TB where i tightened bolts. As soon as i got to the shop i felt uneasy about actually tearing everything apart. so i just stuck to checking all the hoses and testing the gaskets i could get to for leaks and the TB didnt seem to be leaking. i didnt want to take out the fuel rail to get to the IM gasket. ill see if what i did today worked...if not im going to pay someone to take care of it. |
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| S2KPWR |
| did you try spraying with wd-40? that way you could pin point the leak... you wouldnt have to take off your fuel rail etc. |
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| 92_WhItE_H23 |
| no i work at an HVAC supply store so i just grabbed some A/C leak detector. there was a loose VAC hose that leaked real bad when i touched it but im not sure if it leaked without touching it so i just put a hose clamp on it. |
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