strange rattling noise when accelerating
Thread Starter
Lexus Fanatic
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From: Los Angeles/Vancouver
strange rattling noise when accelerating
when my stereo is off, and when i step on the gas, ive been hearing this slight rattling sound
frequency of rattling is faster than your normal rattle
it sounds like it is coming from behind the steering column or something
is this a common problem or will i need to get someone to look into it?
thanx
frequency of rattling is faster than your normal rattle
it sounds like it is coming from behind the steering column or something
is this a common problem or will i need to get someone to look into it?
thanx
Thread Starter
Lexus Fanatic
Joined: Dec 2005
Posts: 6,231
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From: Los Angeles/Vancouver
u mean the engine valves in the cylinders?
so thats a very bad sign if they start making noise?
sry but im such a noob at this, pls help me
thanx
btw i always fill my car with Shell 91 octane V-power gas
so is it knocking still?
anyone got a sound clip of what knocking sounds like?
oh and this usually only happens at a lower rev
when i speed the car up say above 30 mph, i cant hear the "rattling" anymore
so thats a very bad sign if they start making noise?
sry but im such a noob at this, pls help me
thanx
btw i always fill my car with Shell 91 octane V-power gas
so is it knocking still?
anyone got a sound clip of what knocking sounds like?
oh and this usually only happens at a lower rev
when i speed the car up say above 30 mph, i cant hear the "rattling" anymore
Last edited by UberNoob; Oct 12, 2006 at 11:02 PM.
Lexus Champion
Joined: Oct 2005
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From: Alaska
This tough to diagnois online. What you're calling a rattling some may interpet as pinging. It could be just that, a rattle in the dash or under the hood. If you can't find it on your own, perhaps a visit to a mechanic is in order. If it is pinging, perhaps trying a different brand of premium gas will cure the noise.
Thread Starter
Lexus Fanatic
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From: Los Angeles/Vancouver
ok if it is pinging/knocking
ill try switching brand of gas
does knocking permanently damage the engine?
and i thought just about all modern cars have some sort of detonation monitors to adjust timing to compensate for poor octane fuel?
i feel gyped by Shell
i really want to get the gas tested and see if it really is 91 octane
the pump that i fuel up at even has its own hose and nozzle for the premium gas
ill try switching brand of gas
does knocking permanently damage the engine?
and i thought just about all modern cars have some sort of detonation monitors to adjust timing to compensate for poor octane fuel?
i feel gyped by Shell
i really want to get the gas tested and see if it really is 91 octane
the pump that i fuel up at even has its own hose and nozzle for the premium gas
you're right. Our ECU will comphensate for pinging so I doubt it's an issue for now. Does this happen when you're actually driving, or can your replicate the noise by being parked while stepping on the pedal?
sounds to me u may have some heat sheild loose under the car the reason i say is because i had slight pinping when i would accelerate for about 1yr it started out mild then it got to the point that it was a little louder to where i wouldn't let the ladies in the car blah blah blah but put ur car on a lift and shake ur exhaust pipe or see if u can move ur heat sheilds if 1 of them is loose then it could be a good chance that is ur prob.
or if u changed ur mufflers and the bolts wasnt tight it can cause a slight rattle it happened to me when i went from borla to l-tuned.
or if u changed ur mufflers and the bolts wasnt tight it can cause a slight rattle it happened to me when i went from borla to l-tuned.
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Lexus Champion
Joined: Oct 2005
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From: Alaska
This last post about a heat sheild is a good one to check in to. I've read about this several times here on the forum, sorry it didn't come to mind in my earlier post. Yes, modern cars can compensate to a point for low grade gas, but under a load even GS's can ping/knock a little with bad gas.
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Thread Starter
Lexus Fanatic
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From: Los Angeles/Vancouver
ill definately look into the heat shield
i havent been really able to replicate the sound by putting it in park and hitting the throttle
but that being said, this issue sort of comes and goes so i cant even always replicate it on the road either
muffler and such are still stock on this car but when i get some free time in a couple of weeks, ill bring my car to my mechanic and have him take a look at the heatshield on a lift
thanks a lot for the advices for now, ill try to give you guys an update to see what is up later on
i havent been really able to replicate the sound by putting it in park and hitting the throttle
but that being said, this issue sort of comes and goes so i cant even always replicate it on the road either
muffler and such are still stock on this car but when i get some free time in a couple of weeks, ill bring my car to my mechanic and have him take a look at the heatshield on a lift
thanks a lot for the advices for now, ill try to give you guys an update to see what is up later on
i'll give u the simptomes of what i experienced @ times i would go to a stop light, or sign and would go and step on the gas pedal i would here what kind of sounds like a pinging/ slash rattle sound, i knew it wasnt the gas because ive always used hi octane fuel, so what i did i had my step son put the car in park had him step on the brake and tap on the gas while i opened my ears up and thats when i found that the heat sheild was loose i took it off @ my friend shop along with others that was loose.
Thread Starter
Lexus Fanatic
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From: Los Angeles/Vancouver
ill try to do that too
throttle it in park but with the doors open so i can hear the engine better
if it is pinging/knocking though, is this a common problem for 2GS? is there a TSB for it indicating a flash of the ECU/ECM?
im guessing it has more to do with heat shield now since i remember the car made the sound once when the engine was not warmed up yet
throttle it in park but with the doors open so i can hear the engine better
if it is pinging/knocking though, is this a common problem for 2GS? is there a TSB for it indicating a flash of the ECU/ECM?
im guessing it has more to do with heat shield now since i remember the car made the sound once when the engine was not warmed up yet
Thread Starter
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From: Los Angeles/Vancouver
i tried parking it in park and hearing it
not much there
i heard it many times when i tried going uphill
btw where is the heatshield?
i tried looking under the hood and there was no metal plates around the header area
anyone got a pic?
thanx
not much there
i heard it many times when i tried going uphill
btw where is the heatshield?
i tried looking under the hood and there was no metal plates around the header area
anyone got a pic?
thanx
