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| 02:45 PM | ||
| Users Online Now: 2,271 (Who's On?) | Visitors Today: 874,538 | |
| Pageviews Today: 1,453,542 | Threads Today: 598 | Posts Today: 10,325 |
| 02:45 PM | ||
OK, my turn to ask a car question. | |
| JustmeTX
Offer Upgrade  User ID: 84369183  United States05/09/2023 08:58 AM  Report Abusive Post Report Copyright Violation | |
| Twisted
User ID: 78963836 United States05/09/2023 09:07 AM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 74883424 United States05/09/2023 09:09 AM Report Abusive Post Report Copyright Violation | |
| JustmeTX
(OP) User ID: 84369183 United States05/09/2023 09:09 AM Report Abusive Post Report Copyright Violation | Thanks Me, it wants an email etc. Never mind. Last Edited by JustmeTX on 05/09/2023 09:11 AM Justme |
| Anonymous Coward User ID: 84642814 United States05/09/2023 09:10 AM Report Abusive Post Report Copyright Violation | 2015 Honda with 3.5 L engine "Earth dreams". Quoting: JustmeTX Engine will rarely, like once per trip, stumble when warm and idling in gear at a light. Then the engine revs up to stay running I guess. I have a pretty decent 2 way scan tool. No codes. I was getting a fair number of cylinder misfires. Changed the plugs and the coils. Mileage is around 50,000 miles. Impeccably maintained. I can't find the source of the occasional stumble. It is actually a little dangerous, because when it revs the engine, I am at a light or something and would not like to suddenly lurch through a red light. The other day it did it at a drive through car wash, right when the guy was in front of my hood. I instantly popped it into neutral and stood on the brake. The guy was obviously scared. I tried a crank position relearn, as this scan tool is supposed to have that ability, but it would not work. LIke I said, if I drive the car for a half hour trip, it will do this one time. The rest of the time the car runs perfect. It seemed to do better when I disconnected the battery and let everything reboot, but the issue has returned. I disabled the cylinder management system with a little $100 device I bought a couple years ago (it fools the cylinder management system into thinking the engine is not warm yet. ) , but the problem is recent, so I think unrelated. You need to check either the idle air control valve or the electronic gas pedal. I'm going to guess it's the idle air control |
| Anonymous Coward User ID: 74883424 United States05/09/2023 09:11 AM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 85502331 United States05/09/2023 09:12 AM Report Abusive Post Report Copyright Violation | |
| JustmeTX
(OP) User ID: 84369183 United States05/09/2023 09:12 AM Report Abusive Post Report Copyright Violation | 2015 Honda with 3.5 L engine "Earth dreams". Quoting: JustmeTX Engine will rarely, like once per trip, stumble when warm and idling in gear at a light. Then the engine revs up to stay running I guess. I have a pretty decent 2 way scan tool. No codes. I was getting a fair number of cylinder misfires. Changed the plugs and the coils. Mileage is around 50,000 miles. Impeccably maintained. I can't find the source of the occasional stumble. It is actually a little dangerous, because when it revs the engine, I am at a light or something and would not like to suddenly lurch through a red light. The other day it did it at a drive through car wash, right when the guy was in front of my hood. I instantly popped it into neutral and stood on the brake. The guy was obviously scared. I tried a crank position relearn, as this scan tool is supposed to have that ability, but it would not work. LIke I said, if I drive the car for a half hour trip, it will do this one time. The rest of the time the car runs perfect. It seemed to do better when I disconnected the battery and let everything reboot, but the issue has returned. I disabled the cylinder management system with a little $100 device I bought a couple years ago (it fools the cylinder management system into thinking the engine is not warm yet. ) , but the problem is recent, so I think unrelated. You need to check either the idle air control valve or the electronic gas pedal. I'm going to guess it's the idle air control Thanks, that seemed to be what I was getting pointed to in my search. Now I need to find it. :) ALthough not sure my car even has that valve. Last Edited by JustmeTX on 05/09/2023 09:15 AM Justme |
| Anonymous Coward User ID: 84642814 United States05/09/2023 09:12 AM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 84642814 United States05/09/2023 09:14 AM Report Abusive Post Report Copyright Violation | 2015 Honda with 3.5 L engine "Earth dreams". Quoting: JustmeTX Engine will rarely, like once per trip, stumble when warm and idling in gear at a light. Then the engine revs up to stay running I guess. I have a pretty decent 2 way scan tool. No codes. I was getting a fair number of cylinder misfires. Changed the plugs and the coils. Mileage is around 50,000 miles. Impeccably maintained. I can't find the source of the occasional stumble. It is actually a little dangerous, because when it revs the engine, I am at a light or something and would not like to suddenly lurch through a red light. The other day it did it at a drive through car wash, right when the guy was in front of my hood. I instantly popped it into neutral and stood on the brake. The guy was obviously scared. I tried a crank position relearn, as this scan tool is supposed to have that ability, but it would not work. LIke I said, if I drive the car for a half hour trip, it will do this one time. The rest of the time the car runs perfect. It seemed to do better when I disconnected the battery and let everything reboot, but the issue has returned. I disabled the cylinder management system with a little $100 device I bought a couple years ago (it fools the cylinder management system into thinking the engine is not warm yet. ) , but the problem is recent, so I think unrelated. You need to check either the idle air control valve or the electronic gas pedal. I'm going to guess it's the idle air control Thanks, that seemed to be what I was getting pointed to in my search. Now I need to find it. :) I can't remember but I think on that car the throttle position sensor is under where the windshield wipers are. Those 2 things is where I would start. |
| Just Passing Through.....
*MOLON LABE* User ID: 72606497 United States05/09/2023 09:14 AM  Report Abusive Post Report Copyright Violation | 2015 Honda with 3.5 L engine "Earth dreams". Quoting: JustmeTX Engine will rarely, like once per trip, stumble when warm and idling in gear at a light. Then the engine revs up to stay running I guess. I have a pretty decent 2 way scan tool. No codes. I was getting a fair number of cylinder misfires. Changed the plugs and the coils. Mileage is around 50,000 miles. Impeccably maintained. I can't find the source of the occasional stumble. It is actually a little dangerous, because when it revs the engine, I am at a light or something and would not like to suddenly lurch through a red light. The other day it did it at a drive through car wash, right when the guy was in front of my hood. I instantly popped it into neutral and stood on the brake. The guy was obviously scared. I tried a crank position relearn, as this scan tool is supposed to have that ability, but it would not work. LIke I said, if I drive the car for a half hour trip, it will do this one time. The rest of the time the car runs perfect. It seemed to do better when I disconnected the battery and let everything reboot, but the issue has returned. I disabled the cylinder management system with a little $100 device I bought a couple years ago (it fools the cylinder management system into thinking the engine is not warm yet. ) , but the problem is recent, so I think unrelated. You need to check either the idle air control valve or the electronic gas pedal. I'm going to guess it's the idle air control This right here. It's either a throttle position sensor issue or idle control. A 3rd possibility is it could be from bad gas or vehicle needs a fuel system flush with some good fuel additive like Lucas Deep Clean, BG, Amsoil, Royal purple. "She isn't real.....I can't make her real" "Somewhere between the sacred silence and sleep...Disorder, Disorder, Disorder" "The World is a business Mr Beale..." "You depend on our protection yet you feed us lies from the tablecloth......" ENFJ |
| Anonymous Coward User ID: 85688610 United States05/09/2023 09:15 AM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 85502331 United States05/09/2023 09:16 AM Report Abusive Post Report Copyright Violation | |
| JustmeTX
(OP) User ID: 84369183 United States05/09/2023 09:16 AM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 52675385 United States05/09/2023 09:16 AM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 85502331 United States05/09/2023 09:18 AM Report Abusive Post Report Copyright Violation | Idle air control. they can get dirty and not work right and not throw a code, they are cheap and easy to fix. Quoting: Anonymous Coward 85688610 Would my fairly modern engine have that? The videos all are showing older vehicles. Where is the air filter? The box with the filter is connected to a tube..the other end of the tube should be connected to the intake at the IACV |
| Anonymous Coward User ID: 85627976 United States05/09/2023 09:19 AM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 85502331 United States05/09/2023 09:19 AM Report Abusive Post Report Copyright Violation | Idle air control. they can get dirty and not work right and not throw a code, they are cheap and easy to fix. Quoting: Anonymous Coward 85688610 Would my fairly modern engine have that? The videos all are showing older vehicles. [link to www.nope?tbm=isch&q=2015%201.5%20honda%20motor%20iacv%20&tbs=imgo:1 (secure)] |
| Anonymous Coward User ID: 74883424 United States05/09/2023 09:20 AM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 85502331 United States05/09/2023 09:20 AM Report Abusive Post Report Copyright Violation | Idle air control. they can get dirty and not work right and not throw a code, they are cheap and easy to fix. Quoting: Anonymous Coward 85688610 Would my fairly modern engine have that? The videos all are showing older vehicles. [link to www.nope?tbm=isch&q=2015%201.5%20honda%20motor%20iacv%20&tbs=imgo:1 (secure)] The IACV will have vacuum hoses connected to it and the main breather hose. |
| JustmeTX
(OP) User ID: 84369183 United States05/09/2023 09:20 AM Report Abusive Post Report Copyright Violation | Idle air control. they can get dirty and not work right and not throw a code, they are cheap and easy to fix. Quoting: Anonymous Coward 85688610 Would my fairly modern engine have that? The videos all are showing older vehicles. Where is the air filter? The box with the filter is connected to a tube..the other end of the tube should be connected to the intake at the IACV Thanks. The air filter is driver's side front. just behind the battery. Justme |
| JustmeTX
(OP) User ID: 84369183 United States05/09/2023 09:22 AM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 85502331 United States05/09/2023 09:22 AM Report Abusive Post Report Copyright Violation | |
| Anonymous Coward User ID: 85689635 United States05/09/2023 09:25 AM Report Abusive Post Report Copyright Violation | Could be a couple of different things. Dirty or flaky throttle body (clean or replace), idle air control valve (replace), faulty fuel injector (clean or replace), etc. Here's a couple of videos on YouTube to watch to see if you're having the same symptoms as they are. If you search on YouTube for "2015 Honda 3.5 rough idle occasionally" you'll get a lot of results you can sift through. |
| Anonymous Coward User ID: 85772906 United States05/09/2023 09:26 AM Report Abusive Post Report Copyright Violation | |
| FeedYourHead
User ID: 77416429 United States05/09/2023 09:28 AM  Report Abusive Post Report Copyright Violation | 2015 Honda with 3.5 L engine "Earth dreams". Quoting: JustmeTX Engine will rarely, like once per trip, stumble when warm and idling in gear at a light. Then the engine revs up to stay running I guess. I have a pretty decent 2 way scan tool. No codes. I was getting a fair number of cylinder misfires. Changed the plugs and the coils. Mileage is around 50,000 miles. Impeccably maintained. I can't find the source of the occasional stumble. It is actually a little dangerous, because when it revs the engine, I am at a light or something and would not like to suddenly lurch through a red light. The other day it did it at a drive through car wash, right when the guy was in front of my hood. I instantly popped it into neutral and stood on the brake. The guy was obviously scared. I tried a crank position relearn, as this scan tool is supposed to have that ability, but it would not work. LIke I said, if I drive the car for a half hour trip, it will do this one time. The rest of the time the car runs perfect. It seemed to do better when I disconnected the battery and let everything reboot, but the issue has returned. I disabled the cylinder management system with a little $100 device I bought a couple years ago (it fools the cylinder management system into thinking the engine is not warm yet. ) , but the problem is recent, so I think unrelated. Just watched the first couple minutes of this one...sounds like exactly what you are experiencing...see if it will be helplful; Ask Alice when she's 10ft tall This is a battle for the future of civilization. If free speech is lost even in America, tyranny is all that lies ahead. Elon Musk |
| DuckNCover
User ID: 85756117 United States05/09/2023 09:29 AM  Report Abusive Post Report Copyright Violation | Idle air control. they can get dirty and not work right and not throw a code, they are cheap and easy to fix. Quoting: Anonymous Coward 85688610 Would my fairly modern engine have that? The videos all are showing older vehicles. [link to www.nope?tbm=isch&q=2015%201.5%20honda%20motor%20iacv%20&tbs=imgo:1 (secure)] The IACV will have vacuum hoses connected to it and the main breather hose. Isn't the IACV on the throttle body unit and the Air Charge Temperature Sensor on the Breather Hose... |
| tkwasny
User ID: 71641081 United States05/09/2023 09:29 AM Report Abusive Post Report Copyright Violation | Brother-in-law advice who is ASE shop owner and main tech, ex NASCAR North driver/owner: On a 1/4 tank of gas or less, pour in 2 bottles of Marvel Mystery oil (brutal cleaning and dissolving) and run that for 20 minutes at about 1000RPM. It'll run like crap but it's cleaning and fixing, not meant for a Sunday cruise with momma and the kids. |
| Swamprat
User ID: 57854626 United States05/09/2023 09:32 AM Report Abusive Post Report Copyright Violation | Weird, intermittent engine problems are often fuel related, water in fuel. If it happens more as the fuel level goes down, that's your boogie. Dollar tree has water fuel remover. Try the easiest thing first. We aren't cut out to be socialists.We are the people who couldn't be constrained by Europe. We are the malcontents, idealists, speculators, dreamers, inventors, debtors and criminals who would not be chained. We don't play well with others, we are brash, outlandish and cunning. let us do what we do best; let us be Americans. |
| DuckNCover
User ID: 85756117 United States05/09/2023 09:34 AM Report Abusive Post Report Copyright Violation | I see another video saying to clean the throttle air intake. Quoting: JustmeTX I bought the little CRC spray kit last year and cleaned the MAF sensor which helped the engine run better, but I didn't bother with the throttle intake. Maybe I will do that as well. Yes, I'd recommend that. The butterfly, in the throttle body, can stick and cause issues... On more newer vehicles, there is something called a Rudder Control Valve/Module. It controls the butterfly and air intake to the throttle body unit. If you have one of these, it could be dirty or have a contact issue on the wire connector that plugs into the Rudder Control... |
| Anonymous Coward User ID: 74883424 United States05/09/2023 09:37 AM Report Abusive Post Report Copyright Violation | 2015 Honda with 3.5 L engine "Earth dreams". Quoting: JustmeTX Engine will rarely, like once per trip, stumble when warm and idling in gear at a light. Then the engine revs up to stay running I guess. I have a pretty decent 2 way scan tool. No codes. I was getting a fair number of cylinder misfires. Changed the plugs and the coils. Mileage is around 50,000 miles. Impeccably maintained. I can't find the source of the occasional stumble. It is actually a little dangerous, because when it revs the engine, I am at a light or something and would not like to suddenly lurch through a red light. The other day it did it at a drive through car wash, right when the guy was in front of my hood. I instantly popped it into neutral and stood on the brake. The guy was obviously scared. I tried a crank position relearn, as this scan tool is supposed to have that ability, but it would not work. LIke I said, if I drive the car for a half hour trip, it will do this one time. The rest of the time the car runs perfect. It seemed to do better when I disconnected the battery and let everything reboot, but the issue has returned. I disabled the cylinder management system with a little $100 device I bought a couple years ago (it fools the cylinder management system into thinking the engine is not warm yet. ) , but the problem is recent, so I think unrelated. Just watched the first couple minutes of this one...sounds like exactly what you are experiencing...see if it will be helplful; He called it a truck  |
