Question about 1986 Toyota MR2

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My 1986 MR2 dies after running for a while. When its cold, no problem, but when its hot it sometimes idles down until it dies. I flushed the cooling system and was thinking that it might be the EGR valve, but then discovered that with the headlights ON, it doesn't die. I can even keep it from dying by turning the headlights ON. Is this a symptom of a problem other than the EGR valve? Battery and Alternator are both ~ 1 year old.

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Remove the throttle housing & spray some air intake/carb cleaner into all the little holes as these fill up with oil vapour & eventually starve the engine of oxygen. then spray plenty into the air manifold as this also collects plenty of oil vapour. that will solve the problem.

Posted on Nov 17, 2011

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Its the ignition coil over heating when the lights r on it takes power away from the cole hence keeps running try a new coil

Posted on Oct 07, 2009

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Recently had a new water pump fitted to my jeep Cherokee but it's still overheating and the heater in the car doesn't work. Any idea what might be causing this


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I had an experience with a 1984 T-Bird with a 302. The 1986 may have the same system. With that car there was a temperature sensor that affected the idle speed once the car was close to warming up.
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Why does my car die when engine gets hot and restarts when engine cooled


Sorry to hear about that. Your problem is most likely an ignition issue. When the vehicle is cold all the parts (including the coils, ignition module) have "shrunk" so to speak. Then, after the engine runs for a while everything starts to expand if you will. When that happens, connections that make contact when cold no longer do so after the engine warms up. Have it checked.

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My car will start and idle fine sometime and sometime it dies and dies when put in gear


Engine stalls cold or RPM fluctuates at idle up and down or dies near idle.

This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control. If the above cleaning doesn't cure your issues you need to have the computer controlled automatic idle speed control system diagnosed and repaired by a dealer or electronic engine control repair shop.

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Instructions on how to use holts wondarwald


Holts Wondarweld
Flush engine.
EXTERNAL CRACKS
1 Run engine until hot,drain off enough coolant to remove thermostat.
2 Remove thermostat.
3 Mix contents of can thoughoughly! and pour contents into thermostat opening.
4 Replace thermostat cover.& fill radiator with hot water,replace radiator cap.
5 Run engine at a fast idle for 15 mins,dont allow to boil.Top up if necessary.
6 Leave Wondarweld in system for 2-3 days then drain off,flush system replace thermostat and refill.
HAIRLINE CRACKS
1 MIX thoroughly and pour into cold engine (radiator if it has a cap)
2 Run engine until hot.
3 Allow engine to cool then run again until hot.
4 Follow procedure 6 above.
INTERNAL CRACKS
1 Follow external crack instructions except after pouring Wondarweld into engine remove spark plug from
affected cylinder and run engine for 20 mins. If more than one cylinder affected run for 5 minute intervals.
2 Allow engine to cool then drain cooling system and refill with clean water.
3 Drain sump & flush,refill with fresh oil.
Note:- 1/2 pint of Wondarweld for every 6 pints of water,DO NOT add antifreeze for at least 3 days after process.

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My heater in my 2006 monte calro only puts out cold air while idling if i drive it down the road it starts putting out hot air


ive run into this problem, have cooling system flushed,including back flushing heatercore, also have them check for coolant leaks!! very important,

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The engine will not idle when cold


possibly the coolant temperature sensor is faulty

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replace the thermostat it is probably stuck open flush the cooling system and replace with new antifreeze

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