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Thanks again.
Thanks Ed
i never got an answer from dealer on heavy fuel consumption. i now believe it is a problem with the area i live in, hills and city driving. i bought a new small car to get 27 mpg but found i could only get 21mpg at best. also another driver in my area driving a new minivan is only getting 13mpg as well. if i it like an electric car, very slow acceleration, i can get 15mpg.
as far as your noise goes, i don't believe that sounds like the knock sensor many people are experiencing here. the knock that i had came only when the engine was very warm at 2500 rpm under strain. i had the earlier service bulletins performed and it went away, mine was not a knock sensor. the knock sensors are in later years and are limited to a range of vin numbers when the factory had a mis calibrated robot installing the sensor. if you have an 07 in those vin ranges they will replace your sensor.
your issue, if it really is cam slack, could be a whole different story. depending on how willing you are to spend money on this issue you could have different options. i wonder if you have anything in your service record inquiring about this issue while the car was under warranty? even if you don't i would try to talk to the service managers at your local dealers and see if they will present your issue to the honda rep. in my experience i have gotten them to cover half the cost of a major paint flaw for a car i bought used that was long out of warranty.
otherwise i see your options as: get it fixed yourself either at the dealer or independent shop, run it like it is and see what happens, or sell the vehicle. i would probably just run it like it is as i am guessing cam slack is a very major investigation cost, and replacement could be prohibitive. it might be cheaper if that were truly the case, to have an independent shop drop in a used engine from a totaled car. I am not sure how cam slack could effect the gas mileage. i am guessing if could go either way but would probably run roughly if it was effecting mileage. if the mileage was caused by undo friction of the shaft rubbing you could have early failure as it would wear it out.
on the bright side this could just be something harmless, nothing to do with the cam at all. perhaps like mine it was just a loose knock in a random place in the engine that does no harm. and the mileage is just caused my stop and go traffic. i am amazed how heavy these vehicles are and how much energy it takes to get them moving. any hills, cold starts, braking and starting, just kills the mileage.
hope this helps.
My honda odyssey seems to have a very simular problem.
They, so far, raplaced: some heat shield, tork converter, rear engine mount and knock sensor, but ... I still have the same pinging noise.
Mostly heard on accelaration while going up hill and cruising.
It sounds to me like a valve noise, but ... their first guess was tork converter.
Now, after they replaced 4 parts already dealer is saying that noise is ... not that bad ... .
Can you give me any tips on how to deal with this Honda Dealer and Honda.
I think I too need a new transmission.
My odyssey has 36,000 miles.
Sincerely
Marek
I am happy to say that the car is 100% fixed.
So anyone that still has this problem might want to have the dealer check this out.
My symptoms were: What sounded like preignition at 2200- 2500rpms under moderate or heavy acceleration. It got louder over time. If you listen to the sound clip on the TSB for the heatshield, it sounded exactly the same. The noise happend after the car was warmed up and usually right before each shift.
I hope this helps someone here.
Thanks Ed
1. Valve adjustment
2. Software Update
3. Top end engine cleaning
4. Use 93 Octane(to see if removes pinging)
My Local Dealer here is in the south east.
I will pick up car when they have put it back together and ride around with service manager and service tech in car(service tech still hears noise/pinging or knocking).
I am upset because a New car should never have a pinging sound. I have tried almost every reputable gas station in my area, but I know that all the gasoline tankers get their gas from the same place all they do is add a different additive or solution before they refill a gas station underground tanks. Also, here in South East I don't think my state has strict policy on Lemon laws. Anybody with answers please respond so I and others can get help to fix problem.
i read your response to a faulty automated installation of knocking sensor. How do you know this? my 09' odessy is haviing the pinging noise and if this is the solution i will bring in to have it changed. please respond., thankyou
gijoe6
Search this on Odyclub.com. You'll find more info. But definitely persist with TSB 08-071. It wasn't until I showed them the printout that they did the fix and this was after several attempts to get them to fix it. Apparently a lot of dealers had no idea about this and some of them still may not know.
http://www.odyclub.com/forums/showthread.php?s=&threadid=46072&highlight=2008+ts- b
Thanks again.
Good, very very good. www.hondaproblems.com
After wrestling with the dealer for a long time, they finally admitted that they heard the ping.
They replaced the "knock sensor" (which I believe later came out in a service bulletin) (kind of like a recall, but not really a recall, just something they fix at no charge if your vehicle has the symptoms) (after you wrestle with them to make things right) and it seemed to help but it still pings from time to time.
This is my first and last honda)
Honda won't tell you, but some 3.5L engines, the same engine as an Acura MDX, are a high compression engines. My '07 Odyssey had the same problem and we went through all the usual fixes for pre-ignition or pinging under low RPM, high torque acceleration - nothing worked. Until...I put in 93 octane high test gas. Problem solved. High compression engines require high octane or there will be pre-ignition/pinging.
I don't know why Honda won't tell you - unless it's because they advertise the 3.5L as only needing regular octane. This has been the easiest Honda fix for me. The leaking rack seal at 64K and the bad front motor mount at 79K are problems I've never had with any vehicle, including American cars. When I called Honda USA for "Goodwill" on the rack-seal, they were arrogant, refused to work with me, and don't care about repeat customers. No more Hondas for me.
THE PINGING I HAVE HAD WAS RECTIFIED BY REPAIRS DONE ON THE VAN.
THE ENGINE AIR FILTER HOUSING WAS CRACKED AND LEAKING AIR.
I REPLACED IT AND THAT HELPED A LOT.
THE FIX SEEMS UNCONVENTIONAL DO TO THE IDEA OF HOW PING IS CAUSED, BUT IT DID HELP.
IT DIDN'T GET RID OF ALL OF THE PING. I TRIED TO RUN REGULAR TO SEE HOW GOOD THE FIX WAS. AFTER RUNNING A HALF OF TANK, THE PING FROM REGULAR GOT BETTER ONLY BECAUSE THE COMPUTER MADE ADJUSTMENTS.
BUT THE ADJUSTMENTS WERE NOT GOOD ENOUGH, SO BACK TO PREMIUM.
NOT ALL OF THE PING HAS GONE AWAY.
THE PING IS NOTICEABLE AT 1900 RPM. NO MATTER WHICH GEAR YOU ARE IN IT'S 1900 RPM.
I BELIEVE THAT HONDA HAS AN ENGINEERING DESIGN PROBLEM AND THEY KNOW IT CAN NOT
BE FIXED AT THIS POINT. I BELIEVE THEY WANTED TO MAKE THE GAS ECONOMY AS GOOD AS IT
CAN GET AND DIDN'T REALIZE THAT A PERFECTLY CLEAN, NEW ENGINE IS NOT THE SAME AS AN
ENGINE WITH 50K MILES ON THE ENGINE SYSTEM.