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#1
10-22-2004, 03:14 PM
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99 camry LE acceleration noise
99 camry w/ 83k miles and I and starting to hear loud chatter from engine upon acceleration. wondering if this valve related or somehting else. i recall seeing something about pinging that might be an explanation. help please
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#2
10-22-2004, 05:55 PM
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Is this a 4 cyl, or 6 cyl? Could be a bad tank of gas. Has it been doing that with many tankfuls? If it has, try premium gas once to see if it stops the "chattering." If premium does stop the noise but it still does it with a new tank of regular, you may have a carbon build-up. Start by running some good fuel system cleaner such as Techron through the fuel system. See how that helps. Decarbonizing may help further.
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#3
10-25-2004, 12:50 PM
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Re: 99 camry LE acceleration noise
Quote:
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#4
10-25-2004, 01:21 PM
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Re: 99 camry LE acceleration noise
The noise you were hearing is called "pre-ignition." This is when the fuel ignites before it is supposed to. A lower octane fuel will have a much higher tendancy to do this and is almost surely to do so when put in a V6.
If you read through your manual, I'm almost certain that you will find it tells you to put only premium in your V6 Camry, mainly for this reason.
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#5
10-26-2004, 11:24 AM
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Re: Re: 99 camry LE acceleration noise
My parents' 95 Avalon takes regular octane fuel without any problems, and the V6 in that car is more "tuned" than in the V6 Camry. I'm pretty sure that your Camry is designed to run on regular fuel. I've heard that carbon deposits in the cylinders and/or intake can cause this problem. In that case, you'd have to disconnect the air intake hose from your intake manifold and spray intake cleaner directly into the manifold while the car is running. If you haven't heard of this procedure, I can explain further. I just did this to my Camry over the weekend and my pinging on acceleration is compeltely gone. This had been the first time my Camry had this procedure done in all of the 175,000+ miles put on the car.. Ouch.
__________________
* 1992 Camry XLE * 5sfe (4-cyl, 2.2) * Auto Transmission * 165,000 miles
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#6
10-27-2004, 06:33 PM
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Re: Re: Re: 99 camry LE acceleration noise
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I hear some noise in my 99 camry LE V6 (131,000mi) too, when I try to accelerate suddenly. I thought it was because some belts were slipping. I use regular 87 octane. This is stupid that the timing is not adjusted to only spray enough fuel that burns. Is it that I have too many miles and the timing is off. Could you also explain how to clean carbon deposit in detail. Please do suggest a good engine system cleaner that may help. Also, my spark plugs may be worn out. Should I replace them myself. I have a question regarding that too. When you change spark plugs, do you have to adjust the timing too? Dont we have a computer taking care of the timing? In that case may not need to adjust the timing. Ashutosh
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#7
10-27-2004, 08:45 PM
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Check out this link that goes into some detail and has links on removing carbon deposits.
http://www.automotiveforums.com/vbul...d.php?t=301692 Here's another good site that discusses it. It's for a Honda, but the procedure is the same. http://www.v6performance.net/forums/...hp/t-4782.html
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#8
10-29-2004, 12:21 AM
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Re: 99 camry LE acceleration noise
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BTW: how about the spark plug question? How to change it and if at all I need timing adjustment. Any pointers? Thanks, Ashutosh
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#9
10-30-2004, 11:14 AM
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Re: 99 camry LE acceleration noise
Yep, I am having the same issue.. slight tip in pinging/detonation with my v6, now the check engine light came on lol, I will have to clear it with my scanner. It has been getting progressively worse.. I wondered if it wasnt carbon build up and added compression due to the buildup. I was running regular, switched to super.. is better but not gone. I drive like an egg is under the gas pedal so I dont hear it..
You can de-carbon with water as well.. same thing, add it slowly into the vacuum line.. tons of smoke.. this is an old school procedure with the water, but it de-carbons just as well as seafoam. It is the liquid and compression combo that de-carbonizes. I would not leave seafoam in for more than a few minutes as it will leak by and go into the crank case and damage the oil. The Seafoam will not remove the carbon by just sitting on top of the piston.. carbon is just too hard.. only the loosest of the carbon build up will be removed by water or Seafoam. When I was a mechanic I used to take a cup of water, rev up the engine to three thousand rpm's and slowly pour it into the carb until it started to slow the engine speed down, then back off a little and let the engine speed up again while continuing to poor non stop, just slow down the flow.. dont stall the engine while doing it or continue to add water or Seafoam if it does stall. Restart the car if it does stall and continue the procedure. This is the safest way to do it.. with the engine running with water or Seafoam to be sure that you do not hydrolock the engine, liquids do not compress at all in an engine lol. Talk about a ton of smoke lol. A small cup or two of either water or seafoam is all you need with the above procedure except with the vacuum line sucking it up instead of pouring into the carb, then rev the heck out of the engine until the smoke clears and go for a drive. If you use water, you wont have to change the oil as normal operation will evaporate the water out of the engine oil in a long drive of 15 or 20 miles, the seafoam I would be worried the blowby leaking by the rings might damage the oil as it is more of a solvent, so if you use seafoam wait until you are ready to change the oil.
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