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Cant restart engine when hot - Garden

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The most common reason this occurs is that the gap on the spark-plug is wrong. You don't say what make or model you have but a simple solution would be to buy a new spark-plug at a tool hire shop which deals in your model and ask them to set the gap before you take it away.

Posted on Apr 10, 2011

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Posted on Jan 02, 2017

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I have a toyota yaris sedan year 2008. since several days my cars stalls while driving. i have change the fuel pump and fuel filter. the problem was same. i then replace and second hand air flow meter for...


wana GUE$$ or test.
which is it?
which engine?, we cant guess them here. ever.
it like 1million post now www, new pump, new (list of 10 things) and still runs bad. why do that>? the tool is 20 bucks to prove pump good. (and a ton of wasted labor)
learn to DIAGNOSE. (?)

i cant help you all, i have only above is parts lists.
we need SYMPTOMS and tests.
all i have is "Stalls while driving."
I assume nothing, I let testing facts dictate all my actions.

ok (50 to 100 causes) so..... what.?
now my 20 questions,sorry , engines and EFI are complex.
hint join toyotanation? not here?

  1. starts ok hot and cold engine?.
  2. idle at 800 rpm and regulates there hot.?
  3. stalls hot and engine,?
  4. stalls coming to stop signs? or foot pedal hard, or?
  5. does dash lights/gauges go odd just before stall) 12vdc power.?
  6. ever get a full tuneup in last 8 years, what is miles on engine.
  7. does restart easy.?
  8. does doing a fancy right foot action save stall (y/n (hard or easy yes?)
  9. if not restart is there spark now?
  10. if no restart, does test fuel work,
  11. ever read spark plug tips to see if they are black,green ,soaking in fuel or bone dry? or oil soaked ,
  12. and more , im tired,


Feb 12, 2015 | 2008 Toyota Yaris Sedan

1 Answer

Restating 2000 odyssey after warmed up


not sure what that means.
lets start over.
your saying car runs great, cold then hot.
then hard to restart a hot engine, right?
the light thing i dont understand
first off, when you stall and engine or just key ON.
the lamps all self test (read the operators guide there)
this is only a lamp test.
odd, the most important is skipped the CEL, check engine light.
is the engine stalling?
hot restarts, fails are: many.
  1. injector leaking at shut down.
  2. ECT reads to cold when hot. can be below caused
  3. Engine thermostat stuck open and restarts are over rich and floods. that hot engine must be at 180F or more,
  4. never did a 60,000 mile tuneup this decade?
  5. Fuel pressure too high.
i do tune ups first.
then check coolant temperatures, hot. 180F min, and holding or i kick the thermostat to the curb (new stat time)
if it sill dont want to hot start
out comes the scan tool
i scan it, got DTC errors.
is ECT reading 180F ? or above?

that is start on diagnosis.

Feb 25, 2014 | 2000 Honda Odyssey

1 Answer

Crank sensor


Hot starting problems are usually fuel related. When a hot engine is shut off, the temperature of the engine and everything on it continues to rise for awhile as the engine undergoes a period of "heat soak." This can cause fuel to boil inside the carburetor bowl, fuel lines and fuel filter. When you attempt to restart the engine, "vapor lock" obstructs the flow of fuel and the engine doesn't want to start.
This is much less of a problem on fuel injected engines because the fuel is usually under much higher pressure inside the injectors and fuel line. Even so, a fuel line routed near an exhaust manifold or a fuel rail that's exposed to a lot of heat may still suffer the same kind of problems.
Heat soak problems such as these can sometimes be cured by wrapping insulation around affected fuel lines, and/or installing an insulating spacer or heat shield under the carburetor.
A Seasonal Problem Hard hard starting tends to be a seasonal problem, but may be worse in the early months of spring when refiners are switching fuel blends. Gasoline refiners produce fuel with a slightly lower volatility rating (called "Reed vapor pressure") during hot summer months because lower volatility fuel is less likely to boil and cause hot starting problems. During the winter, they switch to a higher volatility fuel because it makes cold starting easier. But if you still have "winter" grade fuel in your tank when warm spring weather arrives, you may experience some hot starting problems. The problem will go away, however, as soon as the refiners in your area switch to their summer grade fuel.
Other Causes Hot starting problems can also be caused by cooling problems that allow your engine to run too hot (the pistons swell up and may scuff the cylinder walls), or excessive resistance in the starter motor that causes the engine to crank slowly. A starter "amp draw" test can be used to check the condition of your starter. Also, many starters have small "heat shields" to protect them from heat radiating from nearby exhaust pipes or manifolds. If the shield is missing, the starter may get too hot and bind up.

Oct 20, 2013 | 1995 Mercury Cougar

1 Answer

3f engine


replace thermostat use the right thermostat rating 195 degrees and make sure vechicle has enough coolant in the system not too much air.too much air in the cooling system where engine coolant sensor cant get hot in the coolant where pcm cant get signal to turn on cooling fans vechicle will run hot.the ECT sensor and thermostat need to be in hot coolant to work right.

Jul 18, 2013 | Vehicle Parts & Accessories

1 Answer

It doesnt want to start butn once running its fine


Hot starting problems are usually fuel related. When a hot engine is shut off, the temperature of the engine and everything on it continues to rise for awhile as the engine undergoes a period of "heat soak." This can cause fuel to boil inside the carburetor bowl, fuel lines and fuel filter. When you attempt to restart the engine, "vapor lock" obstructs the flow of fuel and the engine doesn't want to start.----------------------------------------------------------------------------------
Digiprog3

Dec 20, 2012 | 2005 Dodge Neon

1 Answer

Hot engine won't restart.


remove the upper cover from the engine and clean out the cooling fins mice like to build nests under there and that stops air flow

Jun 06, 2012 | Garden

1 Answer

My john deere 210 runs for about 40 min just fine then it dies. Then the problems begin and the engine hood is so hot I cant touch it. I can restart it and limp it back to the garage and wait for 20-3


was the piston replaced with the wrong one?locking up in the bore when hot?where the rings wrong as well take it apart and check the clearance before the bore is damaged

Apr 24, 2012 | John Deere Garden

1 Answer

96 F 150 5.0l stalls out. possibley heat related. wont restart right away. 2x have gotten restarted after 10 min. both times on highway. seems like ign. cant troubleshoot since it restarts. driving me...


The coil wire slide on type ( not Bolt on ) have a tendansy to expand if they get to hot, thus causing an open in your ignition system and shutting down your engine. much the same as driving down the highway and sudenly turning off your key.After a period of cool down you turn the key and the motor firers up right away because the coil cap has had a chance to cool down as well and cuntract to its original shape ounce again and is ounce again making proper contact,untill it gets to hot again and then the same thing will happen.Solution replace the coil half cap and wires to it.

Nov 21, 2010 | 1996 Ford F150 Regular Cab

1 Answer

Engine hesitates and dies when hot, restarts fine, then dies agai


Check the fuel pump.Thanks for asking and I hope this helps out.Please leave me 4 thumbs up.

Jul 20, 2010 | Craftsman Garden

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