UberNoob

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

dusouth

valves maybe?

UberNoob

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

GWELEX

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.

UberNoob

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

GSteg

iTrader: (15)

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?

#1gs300

iTrader: (4)

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.

GWELEX

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.

UberNoob

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

#1gs300

iTrader: (4)

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.

UberNoob

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

UberNoob

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

Ronsully

My heat shield had a broken piece too. I just removed it and used a cheapo worm clap to cinch it back up. :lol: ghetto repair. :lol:

UberNoob

so where is the heatshield?

#1gs300

iTrader: (4)

if u put ur car on a lift and trace the exhaust system out u will see heat sheilds.