I'm not sure about anyone on the forums, but I still have customers showing up with the hot soak problem. I'm sure that anyone who has ever dealt with this know exactly what I'm talking about. I have searched with google and have yet to find anyone that has posted my fix yet so I'll offer it up to everyone.

I actually tried several times to fix this issue on my wife's accord before I found this. At one point I even tried wrapping the fuel rails with the nasa gold heat reflective tape (sorry but I forget exactly what it's called), but nothing I tried worked. Then I got lucky and found the solution.

I have found more than one person complaining that the dealership ecu upgrade isn't permanent. I have heard of the ecu upgrade lasting between 10 months and 2 years. I have also heard of the diy FPR update. I have never had any success with the fpr update personally, but some people claim it works so I'm just offering it up as an alternative. I noticed that the fuel rails on the accord almost resemble a return less fuel system. The main fuel line enters the rear (closest to the fire wall) rail then a short jumper hose connects the 2 rails together. This allows the fuel to become hot and boil.

In this picture (2000 accord ex v6 stolen from Majestic's site) You can easily see what I'm talking about. The fuel return line is actually attached to the fuel block.

I noticed that the 2000 honda odyssey uses the same lower intake runners. Also the Ody has the more traditional "pass through" type fuel rail set up.

In this picture you can easily see that the main fuel feed enters the forward (farthest from the fire wall) fuel rail, at the end of that rail you can see the jumper hose, then the fuel return is right off the fpr on the rear fuel rail. Now just to be clear the price of this fix does vary quite a bit. Some customers are ok with getting everything needed from the junk yard (about $100 for everything at the local LKQ) and others of course want new parts (rails from lkq everything else from majestic) and that costs about $250-300 depending. Most recently I have seen aftermarket fuel rails on e-bay ($110) that will work like the Ody setup, but stock honda parts just seemed like an easier way to get the job done to me. Either way it is a lot less than the dealership price quote of $1100-2500. Also like I said before I have never had the problem come back after doing my fix.
Now please be aware that this is a pretty straight fwd fix but it isn't 100% a direct swap. Hoses and vac lines need to be reworked, but nothing I wouldn't trust a novice to do.

I'll be preforming this fix on a 2000 Accord sedan ex v6, and will post detailed pictures as soon as all the parts arrive from majestic honda. For now I'll list current money spent:
ody rails from the u-pull junkyard $28.00
numbers 8 & 9 from the ody picture above majestic honda $146.58 shipped
total thus far = $174.58
I am not going to include the prices of any misc parts (hose clamps etc) but will list them as I preform the fix.
**If anyone has questions or if I posted this in the wrong place please let me know.

 

Thanks to jester for this write-up. I copied it into DIY.

 

Just so everyone is aware it is possible to do the same fix with 98 accord coupe v6 parts but I didn't mention it before because I see a lot more ody's in the junkyard than 98 coupes. But it gives everyone another option.

 

I've been meaning to copy over your newer posts in that thread, with the pictures...