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1991 Toyota 4x4, 4 cyl. engine. Surges when coolant level is low, even though it has not yet heated up.

Engine surges when coolant level is low, even though it has not heated up. Once coolant level is topped up, it runs smooth.

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Your carb has a coolant heated choke system if i am correct as car warms up the coolant warms the choke spring. keep full of coolant to keep from other damage

Posted on Aug 20, 2008

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2 Answers

Coolant boiling in resevoir.


It can be faulty coolant temperature sensor.Its not sensing exact coolant heat temperature so its overheating then required level.

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Get the coolant pressure tested, its definitely leaking coolant. You will need to get the coolant running line.


Pressure test will help you to know from where exactly coolant/refrigerant is getting leaked.

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For complete step by step troubleshooting i suggest you to go through the help links mentioned below :----

Click the link below :-----


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http://schematicsdiagram.blogspot.com/2012/01/coolant-enters-in-transmission-on.html

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http://whatisbyme.blogspot.in/2012/05/1991-toyota-camry-order-coolant-bypass.html

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http://whatisbyme.blogspot.in/2012/05/2002-toyota-camry-puff-of-blue-or-white.html

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1994 Toyota Camry: Coolant Leak?

http://technoanswers.blogspot.in/2012/04/1994-toyota-camry-coolant-leak.html

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http://schematicsdiagram.blogspot.in/2012/04/2006-cadillac-dts-coolant-leak-at.html

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http://schematicsdiagram.blogspot.com/2011/12/maf-iat-map-and-coolant-level-sensor.html

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http://schematicsdiagram.blogspot.com/2011/12/gmc-engine-coolant-temperature-ect.html

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http://whoisbyme.blogspot.in/2012/06/loosing-coolant.html

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http://schematicsdiagram.blogspot.com/2012/01/coolant-temperature-sensor-dies-again.html

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http://repairhelpcenter.blogspot.in/2012/06/2000-daewoo-lanos-where-to-add-coolant.html

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http://whatisbyme.blogspot.in/2012/07/blue-water-warning-light-on-dash.html

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Replacing Oldsmobile Engine coolant sensor?

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How to test Engine coolant temperature sensor?

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Replace Coolant Sensor Module on Oldsmobile?

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These details will help.

Thanks.

Nov 28, 2012 | 1996 Lexus GS 300

1 Answer

I was driving my 1991 toyota pickup when it started to overheat i let it sit and cool down then drove it home stopping evertime it got to hot i looked under the hood and found the alternator belt broke I...


Check and top up the coolant level. When an engine heats up fast and there is no heat from the heater it is low enough on coolant that it doesn't circulate through the heater core. Hope this helps.

Sep 21, 2011 | 1991 Toyota Pickup

2 Answers

Overheating.


What you have Discribed is 1 of 2 VERY SERIOUS Problems or 1 You hav BLOWN a HEAD Gasket -or- 2 A CRACKED CYLINDER HEAD This OIL In COOLANT Must be Determined FOR SURE To Be Able to CONCLUDE one of the other, The Overheating Problem it a ByProduct of the BOTH

Dec 09, 2009 | 1991 Toyota Corolla

1 Answer

1991 honda accord- coolent leaked out from water pump area but water pump seems fine-also when car is ideling car would have little power surges and come close to dying - any ideas


for the water pump leaking, get some engine coolant stop leak from any automotive store, it usually contains pump seal lubricant also. the power surges are a separate problem from your pump leak.

Oct 17, 2009 | 1991 Honda Accord

1 Answer

'94 Saab Turbo 900 -- engine surges between 2000 and 2500 rpm


i would remove the coolant sensors and clean then to obtain the correct reading.

Jul 21, 2009 | 1994 Saab 900

2 Answers

Idle surges after warm up and when brake pedal is pressed


1990 22re same problem surge when pedal was depressed thought it was booster or check valve still didnt fix it i even put a brand new booster on it just to make sure still no fix it finnally went away on its own for about a month now it does it just sitting at an idle with out the brake pedal depressed traced all vaccum lines no problem there and still have no clue

Jan 19, 2009 | 1991 Toyota Pickup

2 Answers

Blowing cold air,and overheating


First thing i'd do is check & fill coolant as needed, then monitor level for possible leak. Make sure you run the engine when you add coolant, and make sure heater is on. Let it run for quite a while with cap off, to disperse air in system. When coolant level gets low, engine needs all it can get which will cause it to sort of by-pass the heater, until level gets back up where it should be. Low level explains reason for engine heating up as well as no heat inside. Hopefully the reason for the low level isn't anything too bad, or expensive, but you'll know soon enough if you monitor the coolant level faithfully, or if not sure, have your system pressure tested to avoid major problems in future, if nothing major yet.

Dec 12, 2008 | 1991 Toyota Pickup

1 Answer

Engine hot ... heater cold ?


Check the coolant level, it could be as easy a fix as adding coolant because it's low. Low level causes engine to overheat, and low level won't circulate to heater core, so no heat situation even though engine is running hot. Let me know if this fixes it, if not I'll help .

Nov 28, 2008 | 2000 Ford Taurus

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