I'll second checking with the vacuum gauge. A bouncy needle indicates a tight valve.
Absolutelly- doing this can save alot of unnecessary work and $900 in your case. It did for me. Buy a cheap scanner to check (5 min.) and can use for other tasks.If the valve clearance is too tight, it can adversely affect idle quality. Check the MAP voltage at hot idle, should be under .9.
Checking the MAP sensor readings with a scan tool is basically doing a vacuum check with the ecm's own vacuum gauge, it can be be verified or on engines with no MAP with a scan tool/scope and transducer which is basically all the MAP is a vacuum transducer. If someone has the equipment thats fine but for the average DIY at home a primitive old vacuum gauge will get the job done.I would test vacuum as Trav suggested. Maybe then a good scanner if possible, and if you did the motor mounts yourself you can handle the valve adjustment too. But I kinda find it unusual for the valves to need adjusting at 120k, but you never know!
What would that map voltage convert to Kpa?If the valve clearance is too tight, it can adversely affect idle quality. Check the MAP voltage at hot idle, should be under .9.
There are tables for this, and will depend on the range of the MAP sensors. In this application, not sure.What would that map voltage convert to Kpa?
Those two services have no overlap.Really ? The timing belt was done at 100K miles and they didn't do the valves? That is crazy. Never use that shop again.
? Its a common sense thing, for someone in the know.Those two services have no overlap.
Debatable. They are usually sold together, along with plugs. But not every engine truly needs it. I know a lot of folks who only get the timing belt pkg and plugs done at 100K, and never develop any issues from not adjusting the valves.? Its a common sense thing, for someone in the know.
My guess is a faulty injector. I had a similar issue, car ran fine no loss of power but idled rough at traffic lights in D (auto tranny).I am sure this has been discussed a million times about Hondas in general but, a quick search really didn’t provide anything recently relevant. I have a 2015 Accord V6 with 120,000 miles and really do not know if spending almost $900 at the dealer was the right thing to do for a valve adjustment. The Indy mechanic was not that much cheaper to be honest because I called them too. Normally I would not worry about this because engine runs great, except at idle in gear I can feel the engine vibration through the steering wheel and into the cabin. Common with 4 cyl engines but was not expecting this with the V6. With that said I have changed the motor mounts with oem, cleaned the throttle body, ran Techron through the tank, new plugs, and timing belt was done at 100,000.
I am kind of out of ideas and didn’t know if valve adjustment would affect idle quality at all and if this is something that I could do myself. I am do have mechanical ability and have been inside engines before not never has to adjust valves. What do you all think?
I had an Indy shop do the timing belt. So funny story is that I asked my local dealer right down the street from my work about a valve adjustment a couple months ago. They flat out told me that they almost never do them and that id be wasting my money.Really ? The timing belt was done at 100K miles and they didn't do the valves? That is crazy. Never use that shop again.
The scanner comment was more for live data like the injectors if the OP did not see a problem on a vacuum gauge. I should have been more specific. I also "assumed" that the OP did the timing belt himself if he did all the motor mounts. I don't trust anyone to align the crank, to all other shafts, but maybe that's because I've never paid anyone to do a timing belt or anything else on any of my vehicles.Checking the MAP sensor readings with a scan tool is basically doing a vacuum check with the ecm's own vacuum gauge, it can be be verified or on engines with no MAP with a scan tool/scope and transducer which is basically all the MAP is a vacuum transducer. If someone has the equipment thats fine but for the average DIY at home a primitive old vacuum gauge will get the job done.