Increased oil consumption at ~65K miles?

vtec to vvel · 05-17-2019, 02:24 PM

OP, as others have stated, I would do an oil analysis before jumping to conclusions. Though I don’t know the entire story/history behind your car, based on what you have said, I don’t think the engine itself is damaged, but do know there is some maintenance work to be done to it. You’d be surprised how tough Japanese engines are and can take quite a bit of abusive and still run like a champ.

Misnomer · 05-20-2019, 01:20 PM

I'm much calmer now.

I talked to the shop, didn't need to bring the car back, and did some solid driving both Friday and Saturday with no problem (including some significant idling in hot weather). I think last week I was maybe having a little PTSD from my RX-8 experience. I'll get the next oil change a little sooner than usual, and will have a used oil analysis done then -- just to know. But I'm not worried about my car at the moment, and am hoping to get many more miles out of her.

Misnomer · 05-25-2019, 07:37 AM

The idle issue returned yesterday, at a drive-thru. I was in neutral, right foot on brake, left foot not touching the clutch. Suddenly the idle got super low/rough with shaking, and she nearly stalled a couple times, and I noticed the battery voltage went from the usual 14 down to 12 (I don't know if that also happened last time). Lasted only maybe a minute or so, but she was so close to stalling that I didn't wait to see if the issue self-corrected: I goosed the gas a little, and as soon as I did the engine smoothed out and the voltage went back to 14.

I'll bring it back to the same shop next weekend; I can't get there today/sooner. Again, both for continuity and because if they didn't tighten something properly (or whatever) I won't pay for the fix.

*sigh*

bunk · 05-25-2019, 07:48 AM

Quote:

Originally Posted by Misnomer

The idle issue returned yesterday, at a drive-thru. I was in neutral, right foot on brake, left foot not touching the clutch. Suddenly the idle got super low/rough with shaking, and she nearly stalled a couple times, and I noticed the battery voltage went from the usual 14 down to 12 (I don't know if that also happened last time). Lasted only maybe a minute or so, but she was so close to stalling that I didn't wait to see if the issue self-corrected: I goosed the gas a little, and as soon as I did the engine smoothed out and the voltage went back to 14.

I'll bring it back to the same shop next weekend; I can't get there today/sooner. Again, both for continuity and because if they didn't tighten something properly (or whatever) I won't pay for the fix.

*sigh*

Sounds like your alternator is failing. Autozone can test this for free. And have them check your battery while theyre at it.

Misnomer · 05-29-2019, 02:56 PM

Yeah, the voltage/idle thing definitely seems to be connected. I'm paying close attention this week. Instead of driving it back to the shop (22 miles away), I'll probably just bring it to the local NTB and ask them to take a look.

Spooler · 06-18-2019, 09:15 PM

Quote:

Originally Posted by Misnomer

The idle issue returned yesterday, at a drive-thru. I was in neutral, right foot on brake, left foot not touching the clutch. Suddenly the idle got super low/rough with shaking, and she nearly stalled a couple times, and I noticed the battery voltage went from the usual 14 down to 12 (I don't know if that also happened last time). Lasted only maybe a minute or so, but she was so close to stalling that I didn't wait to see if the issue self-corrected: I goosed the gas a little, and as soon as I did the engine smoothed out and the voltage went back to 14.

I'll bring it back to the same shop next weekend; I can't get there today/sooner. Again, both for continuity and because if they didn't tighten something properly (or whatever) I won't pay for the fix.

*sigh*

Has anyone cleaned the throttle bodies or looked at the air filters? This sound like an Idle air control issue that needs to be addressed. The voltage will drop on the gauge as the idle drops. This is a non-issue.

Zyonara91 · 06-18-2019, 09:20 PM

Quote:

Originally Posted by Spooler

Has anyone cleaned the throttle bodies or looked at the air filters? This sound like an Idle air control issue that needs to be addressed. The voltage will drop on the gauge as the idle drops. This is a non-issue.

For those who want to know how to clean the throttle bodies. First watch this:

Then watch this:

After you do this you can go clean the MAF sensors, here's a vid:

05-17-2019, 02:24 PM	#1 (permalink)
vtec to vvel A True Z Fanatic Join Date: Feb 2015 Location: In a house Posts: 4,027 Drives: Z Rep Power: 502912	OP, as others have stated, I would do an oil analysis before jumping to conclusions. Though I don’t know the entire story/history behind your car, based on what you have said, I don’t think the engine itself is damaged, but do know there is some maintenance work to be done to it. You’d be surprised how tough Japanese engines are and can take quite a bit of abusive and still run like a champ. Misnomer likes this.

05-20-2019, 01:20 PM	#2 (permalink)
Misnomer Base Member Join Date: Nov 2013 Location: Falls Church, VA Posts: 95 Drives: 2020 BMW M240i Rep Power: 13	I'm much calmer now. I talked to the shop, didn't need to bring the car back, and did some solid driving both Friday and Saturday with no problem (including some significant idling in hot weather). I think last week I was maybe having a little PTSD from my RX-8 experience. I'll get the next oil change a little sooner than usual, and will have a used oil analysis done then -- just to know. But I'm not worried about my car at the moment, and am hoping to get many more miles out of her. Rusty and BettyZ like this.

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05-25-2019, 07:37 AM	#3 (permalink)
Misnomer Base Member Join Date: Nov 2013 Location: Falls Church, VA Posts: 95 Drives: 2020 BMW M240i Rep Power: 13	The idle issue returned yesterday, at a drive-thru. I was in neutral, right foot on brake, left foot not touching the clutch. Suddenly the idle got super low/rough with shaking, and she nearly stalled a couple times, and I noticed the battery voltage went from the usual 14 down to 12 (I don't know if that also happened last time). Lasted only maybe a minute or so, but she was so close to stalling that I didn't wait to see if the issue self-corrected: I goosed the gas a little, and as soon as I did the engine smoothed out and the voltage went back to 14. I'll bring it back to the same shop next weekend; I can't get there today/sooner. Again, both for continuity and because if they didn't tighten something properly (or whatever) I won't pay for the fix. sigh

05-29-2019, 02:56 PM	#5 (permalink)
Misnomer Base Member Join Date: Nov 2013 Location: Falls Church, VA Posts: 95 Drives: 2020 BMW M240i Rep Power: 13	Yeah, the voltage/idle thing definitely seems to be connected. I'm paying close attention this week. Instead of driving it back to the shop (22 miles away), I'll probably just bring it to the local NTB and ask them to take a look.