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Trouble with the cylinder reduction mode

5677 Views 10 Replies 6 Participants Last post by  Sporten
First of all I love my 2019 Passport but I along with my local Honda dealership have discovered a major engine issue. When you drive on the highway the vehicle automatically reduces the number of pistons firing in order to improve fuel efficiency. It does this whether the vehicle is in or out of the Econ mode. Sounds great right? The trouble happens if you do a gradual slow down and stop at a junction. Sometimes the vehicle stays in the reduced piston mode and then the check engine light flashes and you have reduced power! The fix - turn off and then restart the vehicle. My Passport is now at the dealership for a major warrant repair after it did this three times over a period of time. The problem can occur in the Ridgeline Pilot and Passprt vehicles but it is random. Anyone else have this problem? Time for Honda to do a recall.
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Interesting and sad. Never seen this thank goodness.
Just one more reason to install VCMTuner 2.
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Sorry to hear about your issues.. i have not had this problem yet.


I said it before and got flamed. Big deal, ill say it again.

The EPA/Big Government are mandating changes to our fuels, lubricants and vehicles for the betterment of our planet.. (So they say)

Many people feel warm and fuzzy because it looks good on paper and they honestly believe that all these changes are necessary and are indeed saving our planet.

I think some changes are good, and are helping, but many are very destructive and far more expensive in the long run. Expensive for the consumer.

If you compare the environmental impact, tail pipe emissions from a modern CRV, Accord, Camery, whatever, compared to an old 1960's oil burning, leaking car, you would clearly see that we have come a long long way to saving our planet.

I get that there are more cars on the road. I get that this topic can be argued or debated on till the cows come home.

Do we really need to hit the Eco button on an emission compliant 4 banger or disable 33% of our cylinders in our clean burning v6 powered cars? I think not.
Fuel itself helps to lubricate and cool engines.
Running cylinders without fuel starves them from the additional lubricity fuel provides.

Oil change intervals have been grossly extended over the past 15 years. Is todays oil better, hell yes. Should we wait 10 or 15K miles to change it? Hell no. The EPA disagrees.
They are more concerned about all the used motor oil than they are about engine repair or replacement costs. When engine componants begin to break down, tail pipe emissions go up.

Auto manufacturers are under great pressure to comply to strict regulations and to achieve self set goals to out shine the competition, which attracts customers.
The end results are not always favorable for us.

If Honda offered a Passport without the idle shut off, cylinder deactivation, ACC, and half of all the other nifty smoke and mirror gadgetry, I'd a bought it.

All that being said, (sorry) this rig, so far has been a pretty darn good car.

I'm interested in learning more about this tuner you speak of CaveGator .
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I'm interested in learning more about this tuner you speak of CaveGator .
VCMTuner 2 (www.vcmtuner.com) is a product that is installed in the engine bay and will disable VCM. There is a lot of good info on their website about the history of VCM, the problems it has created, the lawsuit that Honda lost over it, etc. For our Passports, select the ‘VCMTuner II 2007+‘ model.
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VCMTuner 2 (www.vcmtuner.com) is a product that is installed in the engine bay and will disable VCM. There is a lot of good info on their website about the history of VCM, the problems it has created, the lawsuit that Honda lost over it, etc. For our Passports, select the ‘VCMTuner II 2007+‘ model.
Thanks for your expedient reply!
Are you currently running it?
I'll check it out.
Thanks
Thanks for your expedient reply!
Are you currently running it?
I'll check it out.
Thanks
I didn’t install it right away, but waited until I hit 5K miles, changed out the break-in fluid for full synthetic, and then put it on. Just remember to remove the VCMTuner before you take it in to Honda to have any work done on it. Don’t give them any excuse to blame something else on whatever problem pops up in the future.
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I didn’t install it right away, but waited until I hit 5K miles, changed out the break-in fluid for full synthetic, and then put it on. Just remember to remove the VCMTuner before you take it in to Honda to have any work done on it. Don’t give them any excuse to blame something else on whatever problem pops up in the future.
Thanks
For reference, here are some pictures and notes I took during the install:

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Just for the record, I live in California and was not able to purchase the VCM Tuner II directly from the website because of that, as it is illegal to install them here. They straight up denied my order. That is where my journey to install a VCM Tuner II ended, as far as the EPA is concerned. I have heard rumors, however, that on a particular online auction site these VCMTuner IIs can be purchased brand-new, and with manufacturer's warranty, for closed-track and testing purposes only...
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First of all I love my 2019 Passport but I along with my local Honda dealership have discovered a major engine issue. When you drive on the highway the vehicle automatically reduces the number of pistons firing in order to improve fuel efficiency. It does this whether the vehicle is in or out of the Econ mode. Sounds great right? The trouble happens if you do a gradual slow down and stop at a junction. Sometimes the vehicle stays in the reduced piston mode and then the check engine light flashes and you have reduced power! The fix - turn off and then restart the vehicle. My Passport is now at the dealership for a major warrant repair after it did this three times over a period of time. The problem can occur in the Ridgeline Pilot and Passprt vehicles but it is random. Anyone else have this problem? Time for Honda to do a recall.
So I am getting 20mpg with essentially a 4 cylinder vehicle on the highway? Maybe it doesn't work on mine...
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