Engine dies on Auto.

Xsad · 05-22-2012, 08:54 PM

Problem with our engines.
I have an auto, one day I started the car and the engine shut down after a few seconds due to low RPMs. It only happened once, but now I have noticed that sometimes when I cold start(1200)or idle(600--500) the RPM is lower than before and not stable.*
I'm a mechanic but still new in the school.*
I thought it was the dirty air filter so I washed them and the RPM is about 1400 cold start.*
Please help me figure it out.*

Tribalpinoy91 · 05-22-2012, 09:05 PM

Check your vac lines

fuzzywuzzy · 05-22-2012, 09:07 PM

you washed your paper air filters???

Xsad · 05-22-2012, 09:23 PM

Quote:

Originally Posted by fuzzywuzzy

you washed your paper air filters???

K&N cold air intake filters.

Xsad · 05-22-2012, 09:23 PM

Quote:

Originally Posted by Tribalpinoy91

Check your vac lines

How do you check on that.

Trips · 05-22-2012, 09:36 PM

Take it to the Dealer since your still under warranty

Xsad · 05-22-2012, 09:54 PM

Quote:

Originally Posted by Triple's

Take it to the Dealer since your still under warranty

Over 40000 miles now. No more warranty.

Trips · 05-22-2012, 10:29 PM

Have them diagnose it and go from there.

iceman21_23 · 05-22-2012, 11:05 PM

you got your maf sensors dirty, you didn't let your air filters dry, if you even washed them properly

Xsad · 05-22-2012, 11:31 PM

Quote:

Originally Posted by iceman21_23

you got your maf sensors dirty, you didn't let your air filters dry, if you even washed them properly

so how do yo clean mass air flow sensor, unplug them then use air blower?

harman.khinda · 05-22-2012, 11:48 PM

go to any auto store and buy mass air flow sensor cleaner. lol.

just go to unplug + remove em, be very gentle and very careful, when handling them.

omgZ · 05-23-2012, 12:01 AM

I am currently having the same issue. I couldn't find any leaks.

TreeSemdyZee · 05-23-2012, 12:11 AM

DO NOT blow air on the sensors. It won't clean them and could damage them if the air pressure is high. Just buy the Air flow sensor cleaner. I used car cleaner on mine, but someone said that is too harsh. Don't know if that true or not.

Xsad · 05-23-2012, 02:30 AM

Quote:

Originally Posted by harman.khinda

go to any auto store and buy mass air flow sensor cleaner. lol.

just go to unplug + remove em, be very gentle and very careful, when handling them.

Thanks will do.

Xsad · 05-23-2012, 02:31 AM

Quote:

Originally Posted by omgZ

I am currently having the same issue. I couldn't find any leaks.

Did you do anything with you O2 sensors?

05-22-2012, 08:54 PM	#1 (permalink)
Xsad Base Member Join Date: Dec 2010 Location: Fort Riley, KS Posts: 167 Drives: 2010 370z Turing 7sp Rep Power: 15	Engine dies on Auto. Problem with our engines. I have an auto, one day I started the car and the engine shut down after a few seconds due to low RPMs. It only happened once, but now I have noticed that sometimes when I cold start(1200)or idle(600--500) the RPM is lower than before and not stable.* I'm a mechanic but still new in the school.* I thought it was the dirty air filter so I washed them and the RPM is about 1400 cold start.* Please help me figure it out.*

05-22-2012, 09:36 PM	#6 (permalink)
Trips Administrator Join Date: May 2009 Location: Disneyland, Ca Posts: 8,732 Drives: 🔰 Rep Power: 10	Take it to the Dealer since your still under warranty __________________

05-22-2012, 10:29 PM	#8 (permalink)
Trips Administrator Join Date: May 2009 Location: Disneyland, Ca Posts: 8,732 Drives: 🔰 Rep Power: 10	Have them diagnose it and go from there. __________________

05-22-2012, 11:05 PM	#9 (permalink)
iceman21_23 Track Member Join Date: Jan 2009 Location: league city, tx Posts: 757 Drives: 09' Solid Red 370z Rep Power: 18	you got your maf sensors dirty, you didn't let your air filters dry, if you even washed them properly __________________ Zele front bumper cf front lip, Seibon TS Hood, Work GS2, Ings+1 side skirts Takeda CAI Litespeed Exhaust

05-23-2012, 12:01 AM	#12 (permalink)
omgZ Base Member Join Date: Sep 2010 Location: California Posts: 144 Drives: 10 370z 40th M6 Rep Power: 15	I am currently having the same issue. I couldn't find any leaks. __________________ K&N FILTERS ~ INVIDIA CBE ~ CNT HFC ~ UPREV TUNE ~ ZSpeed CSC ~ RJM CMC ~ WHP/TQ: 315/262 Last edited by omgZ; 05-23-2012 at 12:05 AM.

05-22-2012, 09:05 PM	#2 (permalink)
Tribalpinoy91 Track Member Join Date: May 2012 Location: Las Vegas Posts: 607 Drives: 370z PW Rep Power: 14	Check your vac lines

05-22-2012, 09:07 PM	#3 (permalink)
fuzzywuzzy Base Member Join Date: Apr 2010 Location: In a house Posts: 211 Drives: 370z Rep Power: 15	you washed your paper air filters???

05-22-2012, 11:48 PM	#11 (permalink)
harman.khinda Enthusiast Member Join Date: Feb 2012 Location: Red Bluff, CA Posts: 378 Drives: 10 Nissan 370 PG 7AT Rep Power: 6724	go to any auto store and buy mass air flow sensor cleaner. lol. just go to unplug + remove em, be very gentle and very careful, when handling them.

05-23-2012, 12:11 AM	#13 (permalink)
TreeSemdyZee Premium Member Join Date: Dec 2009 Location: Kentuck-IANA Age: 60 Posts: 4,886 Drives: '09 370 & ‘14 Juke Rep Power: 27409	DO NOT blow air on the sensors. It won't clean them and could damage them if the air pressure is high. Just buy the Air flow sensor cleaner. I used car cleaner on mine, but someone said that is too harsh. Don't know if that true or not.

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