Starting problems when car is hot but stayed shut off for more then 20 minutes. when its cold it's ok. When is started he doing well but may be poor perform a low rpm during acceleration. When i try starting if it's not working for 3 seconde i stop then retry and it start instantly. What could it be ?

It would help to know what the engine is on and what make?
Yamaha XT500
Honda SL125
Generator
Rovovator
Whale Pump
Cement Mixer

Overheating on the fuel line causing an air lock?

What would cause 1995 Chevy blazer to run for 20 minutes ...

answers.angieslist.com > Auto > Auto Repair & Service

Mar 30, 2014 - For example, can you start the car cold, it will warm for 20 minutes, and shut ... While not a car, my Motorcycle (also fuel injected) would run for a little bit and shut off. The issue ... Answered 1 year ago by WoWHomeSolutions.

Car starts and it shuts off/loses power - CarGurus

www.cargurus.com > Questions > Audi > A4

CarGurusJun 20, 2013 - Car starts and it shuts off/loses power - I have a 2003 Audi A4 Turbo.93K on it. ... \n check out these few options 1. loose or faulty electrical connections at, .... After drying it for a few minutes and cleaning with a dry cotton cloth, I have ... you can't fill your car while its running the gas tank is a vacum while its ...

Car starts then dies in a few seconds - CarGurus

www.cargurus.com > Questions > Ford > Crown Victoria

CarGurusFeb 3, 2014 - Car was running fine, and then engine stops. ... 1 out of 1 people think this is helpful. ... my car will start run for a second an shut off . ... under load, dies,starts 15 minutes later, runs fine then stumbles and dies again 3 answers.

Chevrolet Silverado 1500 Questions - Engine Shutting off ...

www.cargurus.com > Questions > Chevrolet > Silverado 1500

CarGurusMay 20, 2015 - Engine Shutting off after about 10-20 seconds on 2004 Silverado ...When the engine is hot, two things occur: (1) thermal effect on .... my 2000 chevy silverado just randomly die then it will start back up idle .... It will run fine for 15minutes. ... run down behind or beside the powersteering pump, that the car will ...

blocked heater core or faulty supply valve or pump

change air filter and fuel filter clean fuel injectors.faulty coolant temperature sensor will cause cold start problems.

Are you sure the relay isn't getting weak? Try swapping with another.

I have exactly the same problem started last winter, ran fine all summer then as soon as it got below freezing again if I start it and run for 15 20 minutes wont restart I have to let it sit for 20 minutes or so and then it will start again. no codes and just turns over without starting. cant be fuel pump like i said had this problem last winter then ran fine all spring summer and fall! Anybody got the answer for this one??

Sounds like you are losing fuel pressure or the ignition module is shutting down when it gets hot. Check for spark when the car is in the no start condition. If spark is ok then install a fuel pressure tester and let car run. When it dies the pressure should be less than 15 psi. You may need a mechanic for this. Best possibility is that you will need a new fuel pump or ignition module.

golfs coldstart system works when you open door/shut door/put key in hole and turn on (in that order)if you delay puting belt on for longer than say 30 secs the coils go cold,hence poor starting.if engine labours after cold start try using (really)one gallon of petrol in tank to clean injectors.
british army put petrol (30%)in diesel tanks of challenger tanks in arctic
to stop fuel freezing.....most parts replacement jockeys in garages will say if you put diesel in tank it will have to flushed out.lot of bollocks.
trust me.have put petrol in by mistake loads of times,only get hot start
problems if you put in too much.

When you remove your thermostat check the number stamped on the thermostat. In cold weather you want a high number and opposite cold weather. Right back with number

Check to make sure your thermostat works right by monitoring the warming up of your engine. With a completely cold engine, start and run the engine for a few minutes, then put your hand on the top radiator hose to monitor if and when it gets warm as the thermostat opens more and more and note the gauge reading( if it works) the top radiator hose should be unbearably hot within 5-8 minutes. If the therm. opens right it should close right aswell, staying open a little while eventhough the radiator may have cooled may be what you are experiencing causing the rapid cooling and is nothing to worry about. The Hose should not get warm very soon after starting the engine. Regarding you gauge, lets take one step at a time, verify proper op. or the therm.