Pinging Help Needed
Thread Starter
Instructor
Joined: Mar 2008
Posts: 218
Likes: 1
Pinging Help Needed
I have a 2001 M6 completely stock. Never had a pinging issue until I took it out of winter storage a few weeks ago. I forgot to put gas stabilizer in and it sat for 5 months. It has been pinging since I took it out. I have run through two complete tanks of 93 octane and ran a bottle of octane booster through one tank. Still pings like an SOB at high RPM and seems to be getting worse. I just filled it with a tank of Sunoco 93 octane and dumped a can of SeaFoam in the tank. I ran about 10 miles or so.... still pings.
A have read alot about this in an effort to learn what to do and not bother anyone with a frequently discussed subject. However, I don't want to damage the motor and am at my wit's end on what to do or what is caausing this. I am new to Vettes, not a mechanic, but mechanically inclined with good directions. Thus, I am looking for some help.
1. What is causing this?
2. Much talk about the MAF What is it? How do I clean the MAF? Dumb question.... Where is it and what does it look like? Any photos?
3. Some talk about the temp sensor. Changing this sometimes fixes the problem. True? If so, where is it, what does it look like, and how do I change it? Any pictures?
4. Any other suggestions?
Thanks.
A have read alot about this in an effort to learn what to do and not bother anyone with a frequently discussed subject. However, I don't want to damage the motor and am at my wit's end on what to do or what is caausing this. I am new to Vettes, not a mechanic, but mechanically inclined with good directions. Thus, I am looking for some help.
1. What is causing this?
2. Much talk about the MAF What is it? How do I clean the MAF? Dumb question.... Where is it and what does it look like? Any photos?
3. Some talk about the temp sensor. Changing this sometimes fixes the problem. True? If so, where is it, what does it look like, and how do I change it? Any pictures?
4. Any other suggestions?
Thanks.
Le Mans Master
Joined: Feb 2006
Posts: 5,267
Likes: 40
From: Phoenix AZ
Maybe the injectors are a little gummed up or slightly clogged and you cant get enough fuel at WOT.
Might have to get the injectors cleaned if the seafoam or some techron wont get it done in a few tanks.
Might have to get the injectors cleaned if the seafoam or some techron wont get it done in a few tanks.
Melting Slicks
Joined: Oct 2006
Posts: 3,447
Likes: 6
From: Los Angeles
Try the seafoam or techron and give it some time to work. Don't use the octane boosters, that stuff is garbage.
Thread Starter
Instructor
Joined: Mar 2008
Posts: 218
Likes: 1
Car has 27k miles and did not ping before storing. How would the converters become clogged? Also, perhaps, I am only guessing it is ping? It sounds like BBs in a tin can at high RPM open throttle. Noise comes on more when it is warmed up completely.
In the interest of full disclosure, I i did miss a shift once last year (about 1,000 miles ago) from 3rd to 2nd instead of 4th. I never heard any strange noises at idle or otherwise so I don't think I did any damage. Car runs like a top.
In the interest of full disclosure, I i did miss a shift once last year (about 1,000 miles ago) from 3rd to 2nd instead of 4th. I never heard any strange noises at idle or otherwise so I don't think I did any damage. Car runs like a top.
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
Car has 27k miles and did not ping before storing. How would the converters become clogged? Also, perhaps, I am only guessing it is ping? It sounds like BBs in a tin can at high RPM open throttle. Noise comes on more when it is warmed up completely.
In the interest of full disclosure, I i did miss a shift once last year (about 1,000 miles ago) from 3rd to 2nd instead of 4th. I never heard any strange noises at idle or otherwise so I don't think I did any damage. Car runs like a top.
In the interest of full disclosure, I i did miss a shift once last year (about 1,000 miles ago) from 3rd to 2nd instead of 4th. I never heard any strange noises at idle or otherwise so I don't think I did any damage. Car runs like a top.
Thread Starter
Instructor
Joined: Mar 2008
Posts: 218
Likes: 1
Perhaps what I'm hearing is not pinging or knock? I had cars that pinged back in the early 80's. This sounds a bit different but this is an aluminum block vs. iron. This sound is a bit higher pitched than the old days. It's only at high RPM (4,500+) when I have it to the floor (or nearly) that I hear this rattling sound.... It could almost be described as sounding like a haphazard electrical spark as well. I think its pinging but want a gut check from those that have heard it before.... It's really a high pitched rattling sound. Thanks to all.
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Racer
Joined: Nov 2008
Posts: 378
Likes: 0
Bingo. Often overlooked! GM had a problem with cats, at least up until 2002. One of mine was failing and was not throwing any codes. Had them both replaced under warranty. This was my 2002 LS1.
My 1999 C5 has at least one failing cat. GM cats are garbage.
My 1999 C5 has at least one failing cat. GM cats are garbage.
Team Owner
Joined: Nov 2002
Posts: 138,689
Likes: 177
From: Poor pathetic little excuse for a boy
Hate to bump an ole thread...
But my '99 FRC is doing the exact same thing. Pinging at high rpm under full or close to full throttle...
OP, did you fix the problem???
We don't test here in FL, is there any harm to just cutting them out???
OP, did you fix the problem???
We don't test here in FL, is there any harm to just cutting them out???
