knocking at high speeds...
10-09-2002, 06:12 PM
#1
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Thread Starter
Join Date: Oct 2002
Posts: 4
knocking at high speeds...
I have a 97 Maxima SE. It's all stock, except a KN&N air filter. I use premium gasoline.
The problem I have is that periodically during highway driving (around 70+ mph), when I try to accelerate, or driving up a hill, my car starts knocking, and I loose power. So I am forced to ease up on the accelerator. Quite frustrating, not to mention worrisome.
What is odd is that this is an intermittent problem; furthermore, it never happens in lower speeds, not even when I push it really hard...
Has anyone else experienced this problem? Should I be worried? Can I do anything about it, or do I just live with it? I took it to a dealer but as the problem is intermittent, it did not happen while at the "doctor's office."
Your insight is much appreciated.
The problem I have is that periodically during highway driving (around 70+ mph), when I try to accelerate, or driving up a hill, my car starts knocking, and I loose power. So I am forced to ease up on the accelerator. Quite frustrating, not to mention worrisome.
What is odd is that this is an intermittent problem; furthermore, it never happens in lower speeds, not even when I push it really hard...
Has anyone else experienced this problem? Should I be worried? Can I do anything about it, or do I just live with it? I took it to a dealer but as the problem is intermittent, it did not happen while at the "doctor's office."
Your insight is much appreciated.
10-10-2002, 04:57 AM
#3
Senior Member
Join Date: Sep 2000
Posts: 888
How many miles on your car? You could have carbon build up. Get BG 44K it will remove the carbon. I believe that it is professional use only so you have to go to a shop.
Other things
Is the K&N clean?
EGR working correctly
Fuel filter
Spark plugs
coil pack
Other things
Is the K&N clean?
EGR working correctly
Fuel filter
Spark plugs
coil pack
10-10-2002, 05:05 AM
#4
Donating Maxima.org Member
Join Date: Apr 2001
Posts: 4,154
Originally posted by 95Max
How many miles on your car? You could have carbon build up. Get BG 44K it will remove the carbon. I believe that it is professional use only so you have to go to a shop.
How many miles on your car? You could have carbon build up. Get BG 44K it will remove the carbon. I believe that it is professional use only so you have to go to a shop.
[url=http://forums.maxima.org/showthread.php?threadid=104931Check your ECU[/url] and see if you're pulling any codes.
When was your last:
spark plug change
fuel filter change
oil change
Have you had a scheduled dealership maintenance?
10-10-2002, 07:10 AM
#5
Member who somehow became The President of The SE-L Club
iTrader: (19)
Join Date: Jun 2001
Posts: 16,033
Switch your brand of gas and see if it goes away. AnGe had the same ping/knock in her 97. She was using Sunoco gas, she switched to Mobil/Exxon and no more pig - completely gone. Some motors are sensitive to gas brands and the additives they use.
It's not a bad idea to use some of the fuel injection, carbon cleaning system that some have recommended as well.
It's not a bad idea to use some of the fuel injection, carbon cleaning system that some have recommended as well.
10-10-2002, 10:46 AM
#6
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Thread Starter
Join Date: Oct 2002
Posts: 4
Guys thanks for your suggestions. I will get on it and try out your suggestions. Here is the extra info some of you asked:
- low mil. -- 35,000
- regular oil changes -- 5w30 redline
- gas used is chevron premium
- air filter is clean
- fuel filter I will change first thing this weekend
- spark plugs are platinum tipped so they should be still good, or should I replace them?
- the ECU code 0304 can be only checked by the dealer, right?
- 95Max, you bring up the coil pack... I am not sure what it is or what it does. Can someone elaborate.
Since this happens only at high speeds, I am suspecting the air filter the most. I am thinking about changing to stock and seeing if the problem goes away.
Again, thanks for all your suggestions.
- low mil. -- 35,000
- regular oil changes -- 5w30 redline
- gas used is chevron premium
- air filter is clean
- fuel filter I will change first thing this weekend
- spark plugs are platinum tipped so they should be still good, or should I replace them?
- the ECU code 0304 can be only checked by the dealer, right?
- 95Max, you bring up the coil pack... I am not sure what it is or what it does. Can someone elaborate.
Since this happens only at high speeds, I am suspecting the air filter the most. I am thinking about changing to stock and seeing if the problem goes away.
Again, thanks for all your suggestions.
10-10-2002, 11:25 AM
#7
Donating Maxima.org Member
Join Date: Apr 2001
Posts: 4,154
you should really only use OEM NGK plugs; the information is located in the 4th gen FAQ's.
if you pull an 0304 and no other codes, reset the ECU (or leave the battery disconnected overnight, or both), and then check for codes again. If the 0304 comes up alone again, replace the knock sensor via skippy directions.
if you pull an 0304 and no other codes, reset the ECU (or leave the battery disconnected overnight, or both), and then check for codes again. If the 0304 comes up alone again, replace the knock sensor via skippy directions.
10-10-2002, 11:56 AM
#8
Originally posted by vnimani2
- the ECU code 0304 can be only checked by the dealer, right?
Again, thanks for all your suggestions.
- the ECU code 0304 can be only checked by the dealer, right?
Again, thanks for all your suggestions.
http://forums.maxima.org/showthread.php?threadid=104931
The knock sensor code will not cause the check engine light to come on.
11-03-2002, 07:04 PM
#9
Newbie - Just Registered
Thread Starter
Join Date: Oct 2002
Posts: 4
Well, I finally got around to checing out the ECU. The code is 0505 => no error recorded. I also replaced the fuel filter. To be honest, being that this only happend at hight speeds (it never happens if I am just racing someone from stop 
, I don't think the fuel filter will have any effect.
Next is the K&N air filter. I am replacing it with a brand new stock, and see what happens.
Well, this is the update. BTW, thanks to all of you for your suggestions and pointers.
, I don't think the fuel filter will have any effect. Next is the K&N air filter. I am replacing it with a brand new stock, and see what happens.
Well, this is the update. BTW, thanks to all of you for your suggestions and pointers.
11-03-2002, 07:19 PM
#10
Senior Member
Join Date: Mar 2001
Posts: 1,111
Re: knocking at high speeds...
Originally posted by vnimani2
I have a 97 Maxima SE. It's all stock, except a KN&N air filter. I use premium gasoline.
The problem I have is that periodically during highway driving (around 70+ mph), when I try to accelerate, or driving up a hill, my car starts knocking, and I loose power. So I am forced to ease up on the accelerator. Quite frustrating, not to mention worrisome.
What is odd is that this is an intermittent problem; furthermore, it never happens in lower speeds, not even when I push it really hard...
Has anyone else experienced this problem? Should I be worried? Can I do anything about it, or do I just live with it? I took it to a dealer but as the problem is intermittent, it did not happen while at the "doctor's office."
Your insight is much appreciated.
I have a 97 Maxima SE. It's all stock, except a KN&N air filter. I use premium gasoline.
The problem I have is that periodically during highway driving (around 70+ mph), when I try to accelerate, or driving up a hill, my car starts knocking, and I loose power. So I am forced to ease up on the accelerator. Quite frustrating, not to mention worrisome.
What is odd is that this is an intermittent problem; furthermore, it never happens in lower speeds, not even when I push it really hard...
Has anyone else experienced this problem? Should I be worried? Can I do anything about it, or do I just live with it? I took it to a dealer but as the problem is intermittent, it did not happen while at the "doctor's office."
Your insight is much appreciated.
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