Posted: 7/24/2015 7:41:10 PM EDT
|
The vehicle in question is a 2001 Honda CR-V w/ 113k miles on it. It has been pretty much trouble free. The timing belt, accessory belts, and plugs were replaced at 100k miles.
After driving 200 uneventful miles yesterday, I filled up with gas, adding 11 gallons. I proceeded to get on the interstate and five minutes later, I noticed a horrible noise when the trans would shift from 4th to 3rd and RPM would jump to 5,000 and vehicle speed approximately 80mph. Once it shifted back up to 4th, the noise went away. I also notice the noise driving around town at lower speeds. It usually does not make the noise when idling, it's almost always under load when I hear it. It is not speed dependent, as I can drop it into neutral and the noise will disappear. It does it with the A/C on and off. No CEL or other idiot lights. Temp gauge has been rock solid, dead center as it usually is. Fuel economy is down from ~25 mpg to ~22mpg, but that's based on the single tank. The noise is best described as a metallic scraping and popping, like Freddy Krueger scratching Robocop's back. It's more of a screech than a ping. I thought it might be heat related, but it did it this morning at 7am after sitting all night. It started about 5 minutes into my drive this morning. I put another 200+ miles on the car today and have added more gas (91 octane) to the tank. Thoughts on what it might be and how to fix it? My plan is to disconnect the battery to clear the ECM, and run another tank of high octane through it. I'm thinking bad gas as the car was fine all day yesterday until I put gas in it. I've never heard engine ping before, so I'm not sure what it sounds like. |
|
Marbles in a tin can is the old school description of it.
You should be able to hear it if you roll down your window and give it some gas while you're right next to something kinda tall and solid, sometimes a high curb is enough to hear the noise bouncing off of it. You can run higher octane gas to see if it goes away that will be a clear indicator. Do you know if this engine still used a distributor? Some honda engine did and didn't around that time. Might just need to set the base timing again if so. |
|
Quoted:
Marbles in a tin can is the old school description of it. You should be able to hear it if you roll down your window and give it some gas while you're right next to something kinda tall and solid, sometimes a high curb is enough to hear the noise bouncing off of it. You can run higher octane gas to see if it goes away that will be a clear indicator. Do you know if this engine still used a distributor? Some honda engine did and didn't around that time. Might just need to set the base timing again if so. Yes, it uses a distributor. Cap and rotor were replaced around 80k miles. Posted Via AR15.Com Mobile |