Registered: Aug 2007
Location: Chicago USA
Posts: 14494

quote:

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Originally posted by pcullen
No, it's not the exhaust fumes but just the smell of a hot engine and the exhaust system. Like when the engine is in "hot soak". Walk by any parked car that has just gone up a big hill and you'll know what I mean.

BTW, while I was pulling away from an intersection this afternoon, I heard a very familiar pinging sound coming from my right. Looking over, I saw what appeared to be another blissful Ody driver, with the windows up, turning away and leaving a dwindling metallic trail of sound

Also, check this out. Can't you feel hvacrman's pain? http://townhall-talk.edmunds.com/di...65.FdSAadfYWAW@ (reply #56)

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Now that's a very comprehensive thread. Pinging triggers concern based upon what we're brought up to understand as symptoms. And now we're being told that it is "normal" under certain circumstances....go figure?

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Registered: Dec 2003
Location: New Brunswick, Canada
Posts: 3261

Pinging is not "normal" and here is the TSB #08-071 Engine Pings Under Moderate to Heavy Acceleration just released:

http://www.in.honda.com/Rjanisis/pubs/SB/A08-071.PDF

__________________
2001 Odyssey LX - WARRANTY WORK: top rubber sliding door gaskets, rear brake drums, clock light, driver's seat belt and EGR TSB performed.

UNOFFICIAL 2001 ODYSSEY THREAD: www.odyclub.com/forums/showthread.p...4664#post384664

1994 Subaru Impreza L

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Registered: Aug 2007
Location: Chicago USA
Posts: 14494

I think the school of thought with pinging being acceptable is regimented under light throttle acceleration conditions only.

As the bulletin stipulates moderate and heavy throttle pinging MUST be addressed. On my turbo 4 banger, I literally blew the top off one of the pistons under full boost when detonation struck one pass because I ran out of water in the water infection reservoir....

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Registered: Oct 2007
Location: NJ
Posts: 41

Awesome that finally the bulletin is out. How did the knock sensor get damaged on so many vehicles I wonder? Anyway, I just scheduled my appointment with my dealer on Friday to get it replaced. Honda should issue a recall. Everyone with an affected vehicle needs this service immediately.

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Registered: Jan 2006
Location: Montgomery, AL area
Posts: 1391

quote:

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Originally posted by JyRO
pvandegriff - The sensor provides an input to the PCM. However, just like any other sensor, the knock sensor can fail.

I'm not an expert on what happens WHEN a knock sensor fails, but it seems logical to me that a failed sensor could send a false signal (but not a signal out of range so that no error code is set)to the PCM. The PCM reads that false signal, and trims the AFR to a ratio that could lead to some knock under certain conditions (like when the transmission shifts).

I think you're saying that a knock sensor is a fail safe to when something isn't working right. While that may be true most of the time, isn't there an Accord engine (other members who know speak up) that the owner's manual says something like, "HP 255 with premium, 248 with regular unleaded." The manual goes on to state that running regular unleaded is no problem.

In that case, I would think the knock sensor comes into play. There are no sensors in the tank that can read and detect octane. I can't imagine O2 sensors determining anything other than the amount of oxygen in the exhaust. So ... how else would this engine produce different hp based on different octanes? My understanding is that the knock sensor will detect ... KNOCK with regular unleaded, send that data to the PCM, and the result is timing is retarded some amount until the knock is eliminated.

On that particular Accord engine (and I suspect this may be true with other engines as well, just not published) running 93 octane allows the PCM to run max ignition timing advance (as programmed) which results in a slight increase in maximum available power output.

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The word on the street, is that Honda read the above post (dated 6/13 I might add), and figured out that this guy is a genious and what he posted was correct. And subsequently released a TSB.

At least that's what I heard.

- JyRO

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Registered: Dec 2003
Location: New Brunswick, Canada
Posts: 3261

FWIW, I did notice your reference to the knock sensor before I posted the TSB.

__________________
2001 Odyssey LX - WARRANTY WORK: top rubber sliding door gaskets, rear brake drums, clock light, driver's seat belt and EGR TSB performed.

UNOFFICIAL 2001 ODYSSEY THREAD: www.odyclub.com/forums/showthread.p...4664#post384664

1994 Subaru Impreza L

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Registered: Oct 2008
Location: San Francisco
Posts: 123

Not to bring a dead issue to the top again but I have a 2009 touring and I can hear pinging near the muffler area. Is this the knocking that you guys are talking about?

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Registered: Jan 2006
Location: Montgomery, AL area
Posts: 1391

Near the muffler? Are you sure this is where you mean?

The pinging (as in pre-ignition) eminates from the engine, and when heard sounds like its from under the hood, or coming from the front underneath (sound bouncing off the pavement). Mostly it sounds like it is coming out from under the hood near the windshield.

If you're hearing pinging from your muffler area, it's probably something else.

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Registered: Dec 2008
Location: spokane, wa
Posts: 5

quote:

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Originally posted by pcullen
Guess I should have searched around a little on this topic. I see TSB 07-028, faulty heat shield. Well, let's hope that's it and maybe that has something to do with the occasional front-end clunk I hear going over bumps hit by rt front tire. Just a SWAG.

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Registered: Jan 2006
Location: Montgomery, AL area
Posts: 1391

quote:

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Originally posted by fljoslin
Comments?

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Registered: Dec 2008
Location: spokane, wa
Posts: 5

The question was about engine pinging and rattles and shakes in my 2006 Odyssey EXL and the need for me to use premium gas.?
Is the only solution to buy a Toyota? If I had known, I would have! Too late now.

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Registered: Jan 2006
Location: Montgomery, AL area
Posts: 1391

quote:

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Originally posted by fljoslin
The question was about engine pinging and rattles and shakes in my 2006 Odyssey EXL and the need for me to use premium gas.?
Is the only solution to buy a Toyota? If I had known, I would have! Too late now.

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Registered: Aug 2007
Location: Chicago USA
Posts: 14494

quote:

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Originally posted by fljoslin
The question was about engine pinging and rattles and shakes in my 2006 Odyssey EXL and the need for me to use premium gas.?
Is the only solution to buy a Toyota? If I had known, I would have! Too late now.

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Never too late to dispose of a vehicle. Carfax is just around the corner. They'll buy it as it is a late model Ody with plenty of buyers on the other end. Simply a matter of finance how it affects your pocketbook. If the negatives outweigh living with it, sell and move on.....

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Registered: Dec 2008
Location: spokane, wa
Posts: 5

quote:

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Originally posted by JyRO
You asked for comments. Some people may never be happy. You sound as if your Ody is a pile. If so ... move on, buy something else. It's not too late, unless you've gotten yourself in a bad position.

As far as the pinging, according to the owner's manual, it should run just fine on 87 octane (mine does). If it doesn't, and it's pingging, there is evidently something wrong. Have you taken it to the dealer and informed them of the pinging? Why not? Or, what did they say?

As far as rattles and shakes, who knows. I keep my tires balanced, balanced perfectly or the dealer keeps balancing until its right. Mine has no rattles or shakes. So I really have no comment on that.

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Registered: Oct 2007
Location: NJ
Posts: 41

Here's the link again, from NewDadVan's above post: http://www.in.honda.com/Rjanisis/pubs/SB/A08-071.PDF. The pinging is due to a faulty knock sensor. It's faulty because it was damaged during the mechanized installation on all 07's and some 08's. There's no way the engine management system can compensate for a bad knock sensor. Please search the forums on this subject as it has been discussed at length. One more thing I'll add is this: despite my having the TSB performed, I will continue to run only super unleaded. That is what the engine was designed and optimized for. They only added the highly sensitive knock senser, in my opinion, to make the van more competitive with others. I think the engine runs more smoothly with better acceleration and probably better gas mileage, although I haven't done any sort of comparison on that.

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