Slight knock from engine

[MYSELF AND I]

Does anyone get a slight knock when letting out the clutch at 1st gear. The only way to get rid of the knock is to launch at 2500rpms. I took it to the dealer and they told me that it could be the belt tensioner so they are going to replace it this saturday.
The weird part is i went from 10w30 to 5w30 and it went away for like 5 days and now it is back. I put 93 octain all the time in my tank. Is there a sensor that could be messed up , i have no idea . Ive tried everything from octain booster to fuel cleaner and nothing will get rid of the ping.
I the messed up part is i just bought this car in march and its got 4500miles now .
If toyota cant figure this out or no one on this board ive decided to get rid of the car and sell it . oh yeah i forgot to add the engine will really knock like its not getting any fuel and then squeal for a sec and then once i get going it stops. It is really bad when letting the clutch out on a hill .

2002 celica gts , 6speed
no mods

[chameleon]

MYSELF AND I, on a high revving, low torque engine like this you MUST rev the car up before you let out on the clutch. 2500 rpms is a good normal speed to rev the engine up before letting out on the clutch, most people rev it up to 3000.

Just letting the clutch out and giving the car gas like you are doing will cause pinging in the engine and wear on the crank journals. It is not a Toyota specific problem or a defect with the engine, this is the way all engines are. If you had a torquey engine, you wouldn't have to rev the engine up as much because it would be making power down low, but the 2zz-ge engine is a high rpm power builder, when you just let out the clutch like that you aren't making any power yet, you are just putting a bunch of strain on the engine. It says right in the owners manual on page 94 that upshiftinging too soon or downshifting too late will cause lugging and possable pinging in the engine. You need to change your driving habits to keep the rpms higher when driving your car. Any 180hp 8000+rpm 1.8 ltr engine would knock if you constantly let the clutch out all the time instead of revving it up first.

[MYSELF AND I]

ok then i will start lifting off at 2200-2500 rpms

ibut wouldnt that burn the clutch out faster?

[chameleon]

oops, I just read my post and it seemed like it may sound kind of mean. Just to let you know, I am not trying to be mean or sound like an a$$, I can understand completely why you are having this problem, especially if you have had experience driving other manuals in the past. The method that you are trying to use to drive your car would work on a lot of other cars, even a lot of four cylindar cars that are similar to the Celica, but the Celica makes and UNUSUALLY small amount of torque, even for its size. So it is under an unusuall amount of strain at low rpm's or under load.

What you are doing would work for a lot of engines, but the 2zz-ge has special needs, mainley high rpms. It just wasn't made to ever be launched any lower than 2,500 rpms...

[TRD StreetRacing]

MYSELF AND I, please let me know what happend, cuz last weekend the same exact same thing started to happend to me.....mine happend'z only in the first few RPM'z of 1 and 2 gears.....i hava an appointment w/ toyota tomm to check it out....i will put my foot up their asss if they blame it on the CAI:bang: ....

toyota: "dear mike, ur back breaks are not functioning due to the fact that the CAI is causing it"

mike: "wtf"

toyota: "the cold air effects the brakes....ect..ect...ect"

mike: ":bs: ....u guys are:gay: "

[MYSELF AND I]

Yeah my car is really bad and it is pittiful to blame it on the torque of the engine because 2 of my friends have the acura RSX runs and it runs like a champ.
He has a 2002 and i have a 2002 celica gts so whats the deal. Toyota is messed up to say that is normal because a brand new engine shouldnt do that with 93 octain and 5w30 oil and no mods. The 2002 gts has the new belt tensioner from what i know but i will let you know what happens. I tried to tighten the throttle but it didnt work even when launching at 2thousand rpms. it wont do it at 2500 rpms but ill i can say is that the clutch is going to go in 3 years or less if i keep that up. Why launch at 2500 rpms and take off all the time that does not make sense. You can just launch at 1200 rpm or even 1k if you let out the clutch and alittle gas it should work fine and it did when i first bought the car . Weird thing is that it went away after i got my 3rd oil change after 50 miles it went away and it was running great . now it isnt and hasnt run normal since. Yeah the car runs great after you let the clutch out but i can understand if your in second and you are only at 2k rpms going 20mph but it should knock at 1st gear all the time.
If they cant fix it i am going to claim a lemon law or something or i want a new engine.
but i will let you know what happens when i have them put it on the diagnostic machine and replace the belt tensioner which i doubt is the problem. oh yeah the new car dealer said it was normal to do that and he told me he has sold many gts in the past. But where i bought the car orginally at a different dealer , the guy i bought the car off told me that it shouldnt knock what so ever even while the engine is at idle. My **** knocks all the time now. could there be bad engines out there somehow i dont know. but if i could go back i would of bought a 2002 maxima and said screw toyota because for 1 , they dont come with any options what so ever i.e power options, two the toyota engine SUCK compared to a maxima engine or even any honda. yeah i got to deal with it and i will probbly sell the car after 2 years and get rid of it for good. If i had the choice to buy another toyota i would of definitly done a lease or i would of got an acura or maxima six speed tranny which would blow the doors off both!
later

[iCyBLuEFiRedGTs]

sorry, this is newbish, but what you guys mean by "knock"?

[MYSELF AND I]

Dude this isnt newbish ,i have been driving a car for the last 10 years and my last car was a 5 speed toyota corrolla 1998 model.
It doesnt take a rocket sciencetist to figure out that a ping and a knock comeing from a engine is not supposed to be there or not.

[TRD StreetRacing]

well today i went to the dealer and they refuse to do any work to it cuz of the "PERFORMANCE" part in it.......and then i seriously fliped on the c.s.m........well striaght after i went to another dealership and they were really cool about the cai.....they even wanted me to come back on moday to check if i can get it check'd out underwarrenty........and they second place told me that all 4 cylinders of mine were misfiring:( ...they even took it in at 3.30pm on a friday afternoon when they about to close for the weekend.....and gave me a free diagnostic

[GTS LAID]

next time you should just be smart about the whole thing and reinstall your stock box when you're looking to take it in to the dealer for a repair.

[TRD StreetRacing]

Originally posted by GTS LAID
next time you should just be smart about the whole thing and reinstall your stock box when you're looking to take it in to the dealer for a repair.

trust me.....now i know it the hard way......by anychance do u know where i can get a stock air box??? cuz i email'd some sponsors and they didn't email me back

[GTS LAID]

i bought one the other day from someone here cause i wanted to do some R&D on it... if you want it PM me and i'll send it to you for the same price. its still in the box actually i havent opened it yet... so all of this is dependant on whether its in perfect condition or not... anyway PM me.

[TRD StreetRacing]

gts laid, did you get my pm or my email???

[MYSELF AND I]

Well i just got back from the dealer and they replaced the belt tensioner on my 2002 gts 6 speed that was just bought this past march and only has 4800miles on it.
The car doesnt ping or knock any more when letting out the clutch at 1200 rpms. So whats the deal with these belt tensioners am i going to have to get a new one every 5k miles?
what a joke toyota needs to fix **** the right way after 2 years of putting out celicas and instead they give me a 7800 rpm rev limiter.
i still enjoy my car and there is no way im getting a 2003 or a 2004 but i will get a new one in 4 years but if honda is beating 4 banger race in hp like they are with the RSX i will go with honda

thanks for telling me knocking is normal and i should let out the clutch at 2500 rpms .
maybe you should be a newbie