Loud noise happened 1 time plus all info I noticed bout last weeks auto purchase

Tiny
MARIA ALLEN-HAYES
  • MEMBER
  • 2003 CHEVROLET TRAILBLAZER
  • 4.3L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 215,000 MILES
I cant fully say what noise it was if was fan hitting sum other part or what it was but here is what I do know:

1. I used northway the other day to drive 3 exits to my appt and 3 exits bk home.

2. Same day had brk pads changed which made 0 noise when I bought auto a week ago. The noise appeared 2nd day owning suv although how bad they were I'm shocked no noise while test driving suv.

3. Ac hose had been taken off SUV asked last owner why he had skipped my question. Most part suv drives smoothly altho I have been getting an shake then bucking a tiny bit but after noise other night its mellowed to 0 shaking and now a tinier feel and sound of bucking not like bucking as if it's out of gas idk what word to say maybe water in gas action or as if needs a tune up soon. Whatever it is it's not severe and dont truly cause issues. Touch gas to go bit faster it stops. Seems the loud noise from otha night solved the shaking prob.

4. At idle it was at half below 1rpms now wen cold or been driving a bit and if I pull over to let dog potty so either while cold or after driving like 35 miles or more I notice sound of engine revving up a bit so I looked and it was up to a full 1rpms. There has been some noise while it's cold or at times being heated like the sound is small vibration and as if a tiny clunk.

5. Anyways the 1st night I bought it climbing a hill I felt the shake and bucking which made me think uh oh I'm gna stall. But it doesnt stall. Also I was pulling out of parking lot and turned my wheels touched brks heard a loud clunk noise. Idk if that noise came bk the otha night and that's what I heard bc I frkd out scared. So anyways that noise of a clunk went away I figrd worn down metal to metal brk pads maybe did the clunk.

6. Same night the noise occurred which I'm worried about I drove northway like I said above and I got near home felt an shake or vibration like I didn't feel b4, sounded like sumthin had broken loose or was falling apart idk if that's considered as an clunk or bang idk bc I can't remember. Anyways I touched gas bc it usually wld stop any tiny shakes I had felt but noise got louder and so I said no I cant touch gas again bc making prob worser. I said a prayer and after the prayer I noticed coasting was gradually picking up my speed and I could touch gas again with 0 noise anymore being present. Got bk to my sis house had her hubby test drive my SUV he lkd everything in sight all over under SUV under hood and saw nada broken or loose and noise was not there. Okay once he went opened it up into speed he got bk claimed he still heard nothing. Well my bf previously opened hood and saw large fan pellar did rub agnst sumthin and he pushed pellar so idk if pellar hitting could make a shake & loud noise and noise get worse touching gas. But that same night I said hold up while idling it didnt make that noise b4 so then my bro in law said it was my motor lifter making a sound but was nit loud as sound I heard. He said if oil got thin and needs changing would make lifter make a noise. My dash cluster tells me my oil life is 61%. Anyways after the shake and noise I forget 2 mention I felt like my feet were burning the floorboard was wicked hot, I kept eyes on my temp and oil gauges they stayed perfectly normal.

7. Notices also a sound that my bf says sounds like wheel bearing 2 him but tire tests tires dont shake, my sis said that's not wheel bearing sound its sound of my tires rolling or turning while driving. I told them both yes it's not huge bad noises to worry bout if they owned my auto bc it drives good most times but to me I'm worried & I just know that's not noise of wheel bearings nor noise from tires. I just know that I hear it from under my hood yes I did figr out tiny noise with air mixes echoes a bit so I ignore that small sound of air in my parts but as for AC hose guy took off b4 I bought SUV, as for idling going from below 1 to 1 rpms, and as for the shake with loud noise happened once I figrd bc I took SUV on northway but I tested it agn see if would do such again I drove 1 exit yes less northway than I did night I heard the sound and felt the awful shake sensation maybe was vibration I felt but I figrd northway doing it wld do so even just if I drove 1 exit. So idk if northway did it but I also did get gas frm fastrac instead of stewarts prior to that shake or vibration and sound as if parts were falling apart or hitting each other or sounded like whatever the noise was as if the vibration was causing the noise or something was rubbing or clunking together. Idk if motor lifter or huge fans pellar could do such noises, give a vibration or shake get louder with acceleration and Idk if during it did give hot floor heat and stayed hot heat aftrwrds or if heat came aftrwrds idk bc I was terrified. Felt like my auto was falling apart or brkn down sk I freaked out. But I did pray and sound went away and I was bk driving normal. Is there anybody on here in upstate NY? Can someone please check my auto out for me? Its tiny bucking isnt bucking it's more like hesitant like a tiny kick bk but touch gas go faster and it stops makes me think get a tune up and add water treatment into it. I havent done any gas treatment bc I'm scared messing sumthin up. She is not like giving me signs get her fixed now tiny small things I felt or heard except that loud noise and vibrating sound or shaked idk which is my main concern besides how it all sudden began revving up during idle some sound I hear till its warmed up and scares me 4 why last owner removed my ac hose. I read online ac hose can stall an auto and removing that hose is fastest way 4 sum1 stop stalling and sell auto 2 seem perfect running. Idk abs and brk lights are on guy plug fuse in lights go out he says that brks were pulsating being abs badly is why he unplugged fuse well that low of brk pad cld def made brks being abs act funny. Idk. Just pls help me. Any1 else try my auto out they not hear or feel what I'm tlkn bout. I think they get SUV out my sight and pick up speed fast bc then they wld not feel that tiny kick bk or tiny buck in gas pedal. I noticed the buck holding pedal steady speed or after cruise control was used. But since brk pads been chngd huge dffrnc on the shaking & bucking actions. Idk it's like brk pads stopped the shaking or vibration when I touched the gas but that tiny kick or buck in gas pedal seems do it till I reach lrgr speeds. I swear is water in my gas or needs throttle body cleaning I'm told cld cause tiny buck idk. But I need sum1 I can trust to drive it like I do start out slowly and hold steady speed. I also was told its had tranny chngd 20,000 miles ago do I believe the guy idk but also setup 4 speed n power so some sounds will be dffrnt idk if is true. However the shut down at times sounds loud like sumthin bashing down or being thrown heavy down wards under my hood. Other times it's a small tiny sound of an quick thump. My bf recorded under my SUV to show me my oil pan and tranny shake while turning out off. Sometimes turning engine on theres also a small thump sound or vibration idk which. But my bf said tranny not supposed shake or oil pan when shutting off engine that an tranny mount could be missing. I'm trying to recall all it's done and noises and actions I've noticed. Also Jensen vx7020 stereo suppsd be hkdup not play dvds while driving they hkdup the radio 2 play dvds while driving b4 I bought auto. They also installed an wire setup to make keypad start SUV lock n unlock doors. I guess it didnt come with my model of my SUV. So they added it. Idk if any thing I've mentioned wld cause thumping or bucking or shaking or loud sound with vibrations or shaking and blow hot floorboard heat onto my feet that 1 time the other night. Only time I ever felt a shake or vibration and clattering noise b4 was on my old ford SUV when the cross thingy with caps popped caps off came loose and shook drive shaft loose that type of clattering & rattle noise with that much vibration and or shaking have I ever felt b4. But I don't get it the SUV drives nicely like new ut shifts fine and all. Yes I noticed stepping on gas even tiny bit taking off the speed gets up to 20 or 30mph quicker but I thought maybe I touched gas a bit faster. Idk. I swore some sound was motor or tranny noise gearing down or noise of like a standard stick shift being shifted down but that sound mixed with air cld made me think of that sounding like so bc now I don't hear that noise anymore. I'm just hoping an oil chng wont hurt my SUV bc I read online u can start hearing ticking or knocking pings after oil changes. I haven't heard noises from any auto from getting oil changes so reading that makes me worried to even go get an oil change in case mine is thin. Pls help me I've told u all that I know about this SUV which was expensive priced that my frnd paid for me. Guy guarantee me msg auto in writing and to fix it if were to be needed and he never shown up to diagnose my auto. I need mechanic to hear wat I hear but I'm worried wont sound or act up for them then be a waste of $$. If a mechanic would ride with me like 40miles I'm sure the buck feeling and sound wld hppn but loud noise I've only exprncd 1 time and hope nada is wrong. Hope just a part quickly rubbed agnst another one or I hope theres a simple fix. Idk why tho hot heat was on floorboard enough 4 me to say ouch. I quickly hit heat off altho idk if it was on I think it was. Seems I dont need heat on bc auto stays warm once temp hand rises to normal I'm now thinking whole time not need heat bc flour board been heated throwing heat but it did happen with heat I'm sure was on after a long trip I wld say I drove atlst 60 plus miles the other day b4 I felt and hear loud noise and vibrating or shaking.
Wednesday, October 30th, 2019 AT 11:45 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
Hello,

It sounds like the engine is misfiring. Do you have a check engine light on? Here are two guides to help us fix the problem:

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

and

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Lets run the codes and get back to me please.

Can you please shoot a quick video with your phone so we can hear the noise? that would be great. You can upload it here with your response.

Please run down these guides and report back.
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Friday, November 1st, 2019 AT 10:34 AM

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