Brief RPM dive when stopped.

gbrettin · 04-17-2014, 05:44 PM

I took my car up to Advanced Auto and had them test the battery. The battery has 313 cold cranking amps per what his machine said. I did a quick google search and the battery should be at 650.

Earlier today the temp was about 32 -35 degrees. It's now 65 degrees and the car is no longer dropping off time to time.

Maybe it's time for a new lightweight battery?

.... just remembered something.... I should check the water level in the battery.... bbiab

gbrettin · 04-17-2014, 06:06 PM

So.............. The water level was really low. I'll let that marinate for a day or so and check back.

I'll also clean the TB's next week.

DEpointfive0 · 04-17-2014, 06:29 PM

My battery is brand new, and worse comes to worse I have an even newer OEM battery
No tune either.

I'll try the TB thing this weekend. Can I drench the TBs in cleaner?

gbrettin · 04-17-2014, 07:11 PM

I'll check with my brother to see how the TB's should be cleaned and let you know. My bro is a master mechanic with 20+ years exp.

DEpointfive0 · 04-17-2014, 07:12 PM

Quote:

Originally Posted by gbrettin

I'll check with my brother to see how the TB's should be cleaned and let you know. My bro is a master mechanic with 20+ years exp.

I know the ideal "book" way, but if I cna disassemble them enough and just sonicate them in something. I'd rather do that.

Don't know how much I need to take off though.

critical · 04-17-2014, 08:59 PM

Quote:

Originally Posted by DEpointfive0

I know the ideal "book" way, but if I cna disassemble them enough and just sonicate them in something. I'd rather do that.

Don't know how much I need to take off though.

i just used a micro fiber and some general cleaning solution. you'll see how dirty they are. just need to remove the intake tubing, or get it out of the way-pretty easy diy.

did this a ways back. it was always in drive at idle accompanied by a voltage drop. problem solved.

gbrettin · 04-17-2014, 09:07 PM

I just got back from my brother's place and talked to him about it. He said it's probably dirty TB's. He pretty much repeated verbatim what Critical said.

1.)Take the TB's off
2.) Spray a micro fiber rag with TB cleaner
3.) Wipe it clean.

DEpointfive0 · 04-17-2014, 10:11 PM

It's still gonna vibrate like a mother with an auto though... ;-(

gbrettin · 04-18-2014, 01:06 AM

I don't give two sh!ts about the vibrations.

I just don't want my charging system to be strained.

Super Werty · 04-18-2014, 01:16 AM

pull them off and clean them with maf cleaner/electrical cleaner

The spraying power from the can should be enough to blast any grim off with ease. no need to scrub or marinate anything

Jordo! · 04-18-2014, 02:31 AM

It's quite possibly the battery.

Failing that search for an intermittent vacuum leak -- the unmetered air will cause you to skew lean at idle; ECU will compensate with high positive fuel trim, run rich, and dip a bit as it attempts to work around the leak.

So much of the throttle on this car is done with VVEL, I doubt cleaning the TB's will fix. Probably not it.

TheRipperZ · 12-01-2014, 06:59 AM

I have that same problem then it started to turn on the oil light at the same time and then about 2 sec goes back to normal yesterday i bought a battery thinking it was it and nope it continue to do it. But the oil light did it when i changed my oil and theres no leaks i checked the dip and it was fine. I am loosing my mind help people!!!

Jordo! · 12-01-2014, 04:42 PM

Quote:

Originally Posted by TheRipperZ

I have that same problem then it started to turn on the oil light at the same time and then about 2 sec goes back to normal yesterday i bought a battery thinking it was it and nope it continue to do it. But the oil light did it when i changed my oil and theres no leaks i checked the dip and it was fine. I am loosing my mind help people!!!

Your ECU might be losing its mind... I'd check to see if have a bad oil pressure sensor if you aren't burning oil or actually losing pressure somewhere in the system... That might require a trip to the stealership and use of CONSULT III.

On that note: Do you have an oil cooler, either OEM or aftermarket?

SouthArk370Z · 12-01-2014, 06:05 PM

While Jordo!'s bad sensor diagnosis has a good chance of being correct, I'd try powering down the ECM first. It's easy to do - remove battery cable and step on brake pedal for a few seconds, then reconnect battery. The car may run rough for a bit while the ECM relearns the engine and you'll have to reset the windows (procedure has been given many times; use search). You may also lose the radio presets.

gbrettin · 12-04-2014, 03:45 PM

The battery was the issue in my case... if anyone was wondering.

04-17-2014, 06:29 PM	#18 (permalink)
DEpointfive0 Premium Member Bitches Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17151	My battery is brand new, and worse comes to worse I have an even newer OEM battery No tune either. I'll try the TB thing this weekend. Can I drench the TBs in cleaner? __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language:

04-17-2014, 10:11 PM	#23 (permalink)
DEpointfive0 Premium Member Bitches Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17151	It's still gonna vibrate like a mother with an auto though... ;-( __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language:

04-18-2014, 01:16 AM	#25 (permalink)
Super Werty Track Member Join Date: Jul 2013 Location: AZ Posts: 668 Drives: '13 Sport Rep Power: 13	pull them off and clean them with maf cleaner/electrical cleaner The spraying power from the can should be enough to blast any grim off with ease. no need to scrub or marinate anything gbrettin and DEpointfive0 like this. __________________ The Build

04-18-2014, 02:31 AM	#26 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	It's quite possibly the battery. Failing that search for an intermittent vacuum leak -- the unmetered air will cause you to skew lean at idle; ECU will compensate with high positive fuel trim, run rich, and dip a bit as it attempts to work around the leak. So much of the throttle on this car is done with VVEL, I doubt cleaning the TB's will fix. Probably not it. __________________ Enjoy it. Destroy it.

12-01-2014, 06:05 PM	#29 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	While Jordo!'s bad sensor diagnosis has a good chance of being correct, I'd try powering down the ECM first. It's easy to do - remove battery cable and step on brake pedal for a few seconds, then reconnect battery. The car may run rough for a bit while the ECM relearns the engine and you'll have to reset the windows (procedure has been given many times; use search). You may also lose the radio presets. Jordo! likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

04-17-2014, 05:44 PM	#16 (permalink)
gbrettin A True Z Fanatic Join Date: Oct 2010 Location: Portage, MI Posts: 2,284 Drives: Tricycle Rep Power: 589151	I took my car up to Advanced Auto and had them test the battery. The battery has 313 cold cranking amps per what his machine said. I did a quick google search and the battery should be at 650. Earlier today the temp was about 32 -35 degrees. It's now 65 degrees and the car is no longer dropping off time to time. Maybe it's time for a new lightweight battery? .... just remembered something.... I should check the water level in the battery.... bbiab

04-17-2014, 06:06 PM	#17 (permalink)
gbrettin A True Z Fanatic Join Date: Oct 2010 Location: Portage, MI Posts: 2,284 Drives: Tricycle Rep Power: 589151	So.............. The water level was really low. I'll let that marinate for a day or so and check back. I'll also clean the TB's next week.

04-17-2014, 07:11 PM	#19 (permalink)
gbrettin A True Z Fanatic Join Date: Oct 2010 Location: Portage, MI Posts: 2,284 Drives: Tricycle Rep Power: 589151	I'll check with my brother to see how the TB's should be cleaned and let you know. My bro is a master mechanic with 20+ years exp.

04-17-2014, 09:07 PM	#22 (permalink)
gbrettin A True Z Fanatic Join Date: Oct 2010 Location: Portage, MI Posts: 2,284 Drives: Tricycle Rep Power: 589151	I just got back from my brother's place and talked to him about it. He said it's probably dirty TB's. He pretty much repeated verbatim what Critical said. 1.)Take the TB's off 2.) Spray a micro fiber rag with TB cleaner 3.) Wipe it clean.

04-18-2014, 01:06 AM	#24 (permalink)
gbrettin A True Z Fanatic Join Date: Oct 2010 Location: Portage, MI Posts: 2,284 Drives: Tricycle Rep Power: 589151	I don't give two sh!ts about the vibrations. I just don't want my charging system to be strained.

12-01-2014, 06:59 AM	#27 (permalink)
TheRipperZ Base Member Join Date: Nov 2013 Location: Puerto Rico Posts: 17 Drives: 09 Nissan 370z m6 Rep Power: 12	I have that same problem then it started to turn on the oil light at the same time and then about 2 sec goes back to normal yesterday i bought a battery thinking it was it and nope it continue to do it. But the oil light did it when i changed my oil and theres no leaks i checked the dip and it was fine. I am loosing my mind help people!!!

12-04-2014, 03:45 PM	#30 (permalink)
gbrettin A True Z Fanatic Join Date: Oct 2010 Location: Portage, MI Posts: 2,284 Drives: Tricycle Rep Power: 589151	The battery was the issue in my case... if anyone was wondering.

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