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2007 Corolla; low idle and overheat condition #4704782
03/23/18 11:32 PM
03/23/18 11:32 PM
Joined: Nov 2011
Posts: 4,899
MTL, CANADA
Rolla07 Offline OP
Rolla07  Offline OP
Joined: Nov 2011
Posts: 4,899
MTL, CANADA
Hey all, my car had some issues today..so wife was in car (car idling) while i was in store and she tells me she shut off car because it was idling funny. (Low idle) almost like it was going to stall. I restarted and sure enough low idle like it was going to stall out. After a few minutes it seemed normal so I drove off again. At drive thru to get my kid food and I noticed temp gauge was higher than normal. Checked under hood and only thing I noticed was coolant overflow was higher than usual...usually its halfway between low and full and it was showing just about at full line. No apparent leaks or anything and no codes thrown (no check engine light) as didnt have my scanner to check for codes. Had it towed to mechanics. Tried to read up a bit wondering what it could be (was thinking head gasket) so checked oil and it looked fine on dipstick, not muddy or abnormal. From what Ive researched Im thinking coolant temp sensor maybe but im not certain. Just curious if anyone has experienced this or if anyone has any ideas on what it could be. Mechanic is only in on Monday so im just curious what it might be. 155k miles. 1zzfe engine. Thoughts appreciated smile


2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967

Re: 2007 Corolla; low idle and overheat condition [Re: Rolla07] #4704793
03/23/18 11:51 PM
03/23/18 11:51 PM
Joined: Feb 2013
Posts: 10,893
Phoenix, AZ
Nick1994 Online content
Nick1994  Online Content
Joined: Feb 2013
Posts: 10,893
Phoenix, AZ
When was the coolant/water pump/thermostat/radiator cap last replaced?


2015 Hyundai Sonata 2.4L 86k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 230k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: 2007 Corolla; low idle and overheat condition [Re: Nick1994] #4704807
03/24/18 12:04 AM
03/24/18 12:04 AM
Joined: Nov 2011
Posts: 4,899
MTL, CANADA
Rolla07 Offline OP
Rolla07  Offline OP
Joined: Nov 2011
Posts: 4,899
MTL, CANADA
Originally Posted By: Nick1994
When was the coolant/water pump/thermostat/radiator cap last replaced?


To be honest, i am running a bit late on doing a coolant flush. Was last done in 2012...water pump - never replaced (never showed signs of a leak)- to this day still no leak. Thermostat- still original, rad cap- still original. Would one of these impact the idle also?


2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967

Re: 2007 Corolla; low idle and overheat condition [Re: Rolla07] #4704822
03/24/18 12:47 AM
03/24/18 12:47 AM
Joined: Dec 2006
Posts: 7,781
Toronto, Canada
KrisZ Online happy
KrisZ  Online Happy
Joined: Dec 2006
Posts: 7,781
Toronto, Canada
If it's a failing water pump, like a deteriorated impeller, reving the engine above idle for few minutes should bring the temp. down.
How is heat when that happens? Any fluctuations in the vent temp?


2015 Dodge Grand Caravan-27k miles.
2006 Mazda 3-163k miles
Re: 2007 Corolla; low idle and overheat condition [Re: KrisZ] #4704824
03/24/18 12:52 AM
03/24/18 12:52 AM
Joined: Nov 2011
Posts: 4,899
MTL, CANADA
Rolla07 Offline OP
Rolla07  Offline OP
Joined: Nov 2011
Posts: 4,899
MTL, CANADA
Originally Posted By: KrisZ
If it's a failing water pump, like a deteriorated impeller, reving the engine above idle for few minutes should bring the temp. down.
How is heat when that happens? Any fluctuations in the vent temp?


To be honest i drove it for literally 1 minute to the drive thru..idling was normal at drive thru (strangely) but temp was going up quickly. No signs of overheating when car displayed low idle issues earlier.


2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967

Re: 2007 Corolla; low idle and overheat condition [Re: Rolla07] #4704840
03/24/18 01:55 AM
03/24/18 01:55 AM
Joined: Feb 2013
Posts: 10,893
Phoenix, AZ
Nick1994 Online content
Nick1994  Online Content
Joined: Feb 2013
Posts: 10,893
Phoenix, AZ
A water pump that has lost its fins to corrosion won't pump much water. A lazy thermostat can open late and make it run warmer. And a bad radiator cap won't hold pressure and can make it overheat.

Overheating can make the idle weird.

Sounds to me the entire cooling system needs a refresh just to start with.


2015 Hyundai Sonata 2.4L 86k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 230k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: 2007 Corolla; low idle and overheat condition [Re: Rolla07] #4704895
03/24/18 06:28 AM
03/24/18 06:28 AM
Joined: Nov 2006
Posts: 20,139
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,139
MA, Mittelfranken.de
Are the electric fans coming on?


ASE L1, Master. Deutsch Meisterbrief.
Re: 2007 Corolla; low idle and overheat condition [Re: Trav] #4704898
03/24/18 06:36 AM
03/24/18 06:36 AM
Joined: Oct 2009
Posts: 3,349
Wet side WA
JohnnyJohnson Online content
JohnnyJohnson  Online Content
Joined: Oct 2009
Posts: 3,349
Wet side WA
Originally Posted By: Trav
Are the electric fans coming on?
thumbsup


2004 Corolla 125425
Out: VML 5w-30 TG4967 OCI 5007 Miles
In: EDGE EP 5W-30 Bosch 3311 122537 7-18-18
2006 Duramax 74277
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 74705 4-22-18
Re: 2007 Corolla; low idle and overheat condition [Re: Trav] #4704959
03/24/18 07:57 AM
03/24/18 07:57 AM
Joined: Nov 2011
Posts: 4,899
MTL, CANADA
Rolla07 Offline OP
Rolla07  Offline OP
Joined: Nov 2011
Posts: 4,899
MTL, CANADA
Originally Posted By: Trav
Are the electric fans coming on?


Not sure, but would that cause the low idle too?


2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967

Re: 2007 Corolla; low idle and overheat condition [Re: Rolla07] #4704963
03/24/18 08:01 AM
03/24/18 08:01 AM
Joined: Nov 2006
Posts: 20,139
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,139
MA, Mittelfranken.de
Sure it would, an engine overheating will get tighter. Check the fans, I think you will find they are not coming on.


ASE L1, Master. Deutsch Meisterbrief.
Re: 2007 Corolla; low idle and overheat condition [Re: Rolla07] #4704999
03/24/18 08:31 AM
03/24/18 08:31 AM
Joined: May 2005
Posts: 10,403
ROCHESTER, NY
Char Baby Online content
Char Baby  Online Content
Joined: May 2005
Posts: 10,403
ROCHESTER, NY
All good advise!
It seem as though some maintenance is in order with a good flush through the heater core and possible a new T-Stat and/or water pump and even belt operation...and check the fan operation.


"Retired"
-----------------------------------

'80 Firebird FORMULA V8/4bbl-purchased "NEW"
'15 Nissan Altima 2.5 SV
'15 Honda Civic LX
Re: 2007 Corolla; low idle and overheat condition [Re: Trav] #4705000
03/24/18 08:31 AM
03/24/18 08:31 AM
Joined: Nov 2011
Posts: 4,899
MTL, CANADA
Rolla07 Offline OP
Rolla07  Offline OP
Joined: Nov 2011
Posts: 4,899
MTL, CANADA
Originally Posted By: Trav
Sure it would, an engine overheating will get tighter. Check the fans, I think you will find they are not coming on.


Thank you sir smile


2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967

Re: 2007 Corolla; low idle and overheat condition [Re: Rolla07] #4705013
03/24/18 08:45 AM
03/24/18 08:45 AM
Joined: Jan 2008
Posts: 10,821
OH
SatinSilver Offline
SatinSilver  Offline
Joined: Jan 2008
Posts: 10,821
OH
Usually when the water goes bad on these engines it starts weeping coolant. I had mine replaced under warranty at the 60k mark. Just made it. I noticed the over flow tank was losing coolant, going from the full line to the min line in a few months.

Most recommend a simple drain and fill for the coolant on Toyotas fyi. A new radiator cap would be a cheap fix. Plus check the fans as mentioned. But would hold off on a new water pump for now. Next on list would be a new oem t-stat.

Last edited by SatinSilver; 03/24/18 08:46 AM.
Re: 2007 Corolla; low idle and overheat condition [Re: Rolla07] #4705072
03/24/18 09:50 AM
03/24/18 09:50 AM
Joined: Dec 2006
Posts: 936
midwest
JamesBond Offline
JamesBond  Offline
Joined: Dec 2006
Posts: 936
midwest
A bad battery or alternator cn cause running and gauge weirdness.

Re: 2007 Corolla; low idle and overheat condition [Re: JamesBond] #4705078
03/24/18 09:55 AM
03/24/18 09:55 AM
Joined: Jan 2008
Posts: 10,821
OH
SatinSilver Offline
SatinSilver  Offline
Joined: Jan 2008
Posts: 10,821
OH
^ True, esp about the battery. Sometimes they even test ok but after replacement the issues disappear.

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