Pinging on Acceleration
Thread Starter
Burning Brakes
Joined: Sep 2001
Posts: 754
Likes: 0
From: Livermore CA
Pinging on Acceleration
Recently I have noticed a slight pinging when I accelerate regardless of the RPM range. If I step down on the gas fairly hard it pings for about 4 or 5 pings then stops. If I go WOT, it pings a little the whole way to the rev limiter.
This just started not that long ago. Since it started, I cleaned the MAF wires with IPA, had a lot of crud on them. Any suggestions? Should I try and clean the injectors, or change plugs? I have been running the same gas, changed brands and no difference.
Any suggestions would be appreciated. :auto:
This just started not that long ago. Since it started, I cleaned the MAF wires with IPA, had a lot of crud on them. Any suggestions? Should I try and clean the injectors, or change plugs? I have been running the same gas, changed brands and no difference.
Any suggestions would be appreciated. :auto:
Burning Brakes
Joined: Apr 2002
Posts: 798
Likes: 0
From: Manchester NH
Re: Pinging on Acceleration (MiamiDave)
I don't know if it applies to other years/VINs, but there was a TSB on this for my '01. I had the PCM updated and the problem was greatly reduced. As I still have a slight amount of pinging at times (seems to be most prevalent when I've been driving normally for several minutes then nail it - after the first WOT it won't do it again unless I drive easy for several minutes, and it only does it at WOT).
There is another TSB on mine for the rear knock sensor, and my mechanic may replace that next (although, he's found that the rear knock sensor most frequently goes bad on cars which have their engines washed regularly, and my engine's never been wet).
Good luck - let us know what you find out,
Pete
PS - I'll let everyone know if I find a solution....
There is another TSB on mine for the rear knock sensor, and my mechanic may replace that next (although, he's found that the rear knock sensor most frequently goes bad on cars which have their engines washed regularly, and my engine's never been wet).
Good luck - let us know what you find out,
Pete
PS - I'll let everyone know if I find a solution....
Drifting
Joined: Jul 2002
Posts: 1,262
Likes: 7
From: Kissimmee, FL
Re: Pinging on Acceleration (pewterhdtop)
Might be carbon build-up. Try a can/bottle of BG44K gas additive. It may be hard to find but it works wonders - about $20.00 a bottle. It solved my problem. Do a search and see other comments. :thumbs:
Le Mans Master
Joined: Oct 1999
Posts: 8,205
Likes: 40
From: Tucson AZ
Re: Pinging on Acceleration (pewterhdtop)
Allgood suggestions. I would try to do the simple "decarb" first. What type of gas are you using? Could be bad/contaminated with moisture, etc. good luck. :yesnod: :)
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Racer
Joined: Jul 2001
Posts: 386
Likes: 0
From: Round Rock, Texas, USA
Re: Pinging on Acceleration (pewterhdtop)
Do you have any scan tool to verify your A/F? If the MAF is not giving correct info to the PCM it will definitely impact the A/F which could lead to the pinging. Also, do you have any idea how much timing your running? Plus, what is your custom intake?
Tech Contributor
Joined: Mar 2003
Posts: 12,094
Likes: 197
From: Colorado Springs, CO
St. Jude Donor '08-'09-'10-'11
Re: Pinging on Acceleration (carpe dm)
Allgood suggestions. I would try to do the simple "decarb" first. What type of gas are you using? Could be bad/contaminated with moisture, etc. good luck. :yesnod: :)
Race Director
Joined: Mar 2000
Posts: 17,602
Likes: 20
From: Palm City Florida
Re: Pinging on Acceleration (SpinMonster)
Allgood suggestions. I would try to do the simple "decarb" first. What type of gas are you using? Could be bad/contaminated with moisture, etc. good luck. :yesnod: :)
:iagree: Decarb first to see if there is actually anything you need to fix
:iagree: Decarb first to see if there is actually anything you need to fix
Thread Starter
Burning Brakes
Joined: Sep 2001
Posts: 754
Likes: 0
From: Livermore CA
Re: Pinging on Acceleration (chuckster)
I don't think the issue is bad gas, I have had this ongoing for several weeks now. I cleaned the MAF first, but did not gain much improvement. I do not have access to a scan tool.
I did add a can of PI injector cleaner, and on the way home last night it stopped the pinging! I am not yet ready to declare victory, but I am thinking the injectors (or at least one) may be somewhat fouled. If this does not continue to work, I plan on doing a decarb, then maybe a dyno tune.
As far as my custom intake, it is like many others here, I have a performance hood seal and have opened up the stock cover to flow more air along with a high flow 2 stage foam (oiled) filter. (thus the MAF cleaning for oil). The only real addition is a deflector for any water leak thru from the hood just in case I should get some with the hood seal.
Thanks for all the suggestions!! :cheers:
I did add a can of PI injector cleaner, and on the way home last night it stopped the pinging! I am not yet ready to declare victory, but I am thinking the injectors (or at least one) may be somewhat fouled. If this does not continue to work, I plan on doing a decarb, then maybe a dyno tune.
As far as my custom intake, it is like many others here, I have a performance hood seal and have opened up the stock cover to flow more air along with a high flow 2 stage foam (oiled) filter. (thus the MAF cleaning for oil). The only real addition is a deflector for any water leak thru from the hood just in case I should get some with the hood seal.
Thanks for all the suggestions!! :cheers: