Why is my car hard to start after warm up?

Sometimes, a faulty fuel pump check valve may cause starting problems when the engine has been warmed up.Keep this in mind when your fuel pressure regulator or fuel pressure damper test OK, but there seems to be something wrong with system pressure. Also, check the throttle position sensor.

Why does my Harley Davidson not start when hot?

Found that when bike is hot, doesn’t want to start. It doesn’t stall when hot, but if I shut it off it doesn’t want to restart. So far, if I sit there and hit the start button enough it will finally fire, but concerned that one day it won’t start.

Why is my Chevelle 350 hard to start?

Fuel pump check valve doesn’t maintain pressure in the fuel rail so it boils and then you have to crank excessively to get rid of the vapor before it will start. Bought a 1972 Chevelle 350 a couple years ago. Every time I drove it it wouldn’t restart easily or sometimes not at all unless I waited a while.

What to do when your car is hard to start?

Sometimes, diagnosing a hard-to-start warmed engine can take you a few minutes; othertimes, it may take some probing around different potential components or systems. To make it easier, the following sections outline the most common sources of trouble and what you can do to check them for potential problems. II.

What causes a car to have a hard warm start?

Hard warm starts can also be traced to a leaking fuel pressure regulator (FPR) or fuel injector. Sometimes, a fuel pressure dampener may cause the same symptoms. At the beginning, a worn FPR or fuel injector may give in to pressure in the fuel line and then stop leaking.

Why does my Dyna hard start when hot?

You can spend a ton of money to only find the Least expensive things are the problems.. Hard starting when HOT, but the engine spins up fine, means either lack of fuel or weak, no spark. If your Dyna is EFI, your fuel pump is losing prime/pressure due to fuel line leak…look here:

Why is my starter so hard to start?

BUT, more compression and starting load means more strain and stalled current draw on the starter….all things being equal. “Usually hard starting is a tossup between aged battery or bad starter depending on duty of service time and stress wise.

When to know if your car is hard to start?

At one time or another, the starter motors will wear out and suffer a breakdown. You should check the starter when absolutely nothing happens after turning the ignition switch, or the car turns over slowly with faint dash lights. 5. Failing Solenoid

Why does my car take so long to start?

When your engine is warm and running normally it has lots of sensors to help determine the right ignition timing and fuel to keep it running smoothly. When your engine is first started, these sensors can’t help for a few seconds so the computer makes an educated guess at what the engine needs to run.

Why is my car cranking but not starting?

Your vehicle may still start with your battery as low as 50% but at that level, it may also leave you stranded on a cold day. If you’re having other starting problems, we’d like to help out with that too! Why is My Car Cranking but not Starting? If your engine will turn over but just won’t start you could have a few different problems.

What should I do if my car misfire after warm up?

Misfire after warm up. Runs great when cold. Has new engine new plugs wires injectors when starts misfiring can shut down start back up and runs fine until a few minutes then starts again. have the same problem? This sounds like you have an intake valve that is leaking. Can you do a leak down test to confirm the issue? This guide can help as well.

Why does my car not start in the morning?

Used best quality fuel system cleaner 3-4 times when tank was empty (to diagnose the problem) Recently changed oil/oil filter (to make sure I’m using correct viscosity oil) The problem is still there. The reason why I’m not leaning towards fuel pump / filter is because first thing in the morning it starts perfectly.

What happens when a car warms up at idle?

We can look at what happens when a car warms up, what comes to mind is it leans out. So saying this problem is caused by a small vacuum leak and the system its self compensates while car is cold would be fine if we only have issues at idle, but we have them at speed.

What should I do when my car is warm?

Check And Replace Spark Plug And Wires (If Needed) Turn on the car’s ignition and let the engine warm up. While the engine is warming, make sure it deactivates the choke linkage. Then, using insulated plug wire pliers take out the wires from the plugged location.

Why does my Car start up when the engine is off?

You very well may have a leaky fuel pressure regulator or fuel injector dumping fuel into the motor when the car is off. Have the mechanic check these things. no, it cranks up pretty much as “normal” warm or cold. it doesn’t take a long time before the engine fires up.

Why does my Car start when the engine is warm?

Second possibility also has to do with the injectors. When worn they can get out of resistance spec from the internal wires developing an open condition that gets exacerbated when the engine is warm thus demanding too much current to jump the gaps to fire which would also cause a warm start issue.

What kind of car does not start after warm?

Pontiac Grand Prix Questions – Car will sometimes not start after warm. – CarGurus Car will sometimes not start after warm. When i start my car, for the first time during the day- I have no problem. When I go somewhere and shut it off, sometimes it won’t resatrt.

Why does my car starter not crank when it’s Hot?

If your starter easily cranks a cold engine, but “drags” or cranks very slowly when hot, there may be a “heat soak” problem. Before you condemn the starter as bad, you should perform a system diagnosis of the battery, cables and starter.

Is the engine not to start when hot?

Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Engine Not To Start When Hot. This topic contains 13 replies, has 6 voices, and was last updated by EricTheCarGuy 7 years, 6 months ago. Recently my 1995 Toyota Camry US 5S-FE (4-cylinder, 2.2 liter, 16-valve) engine always can start when cold.

What to do when your car won’t start?

Checking camshaft timing is an extensive process. Keep in mind, your failure is only occurring when it is hot. For a mechanic to diagnose your car, you will need to reproduce the problem. Reproducing the problem could be the most challenging part of this diagnosis.

What to do if your car won’t start in cold weather?

If Your Car Won’t Start in Cold Weather, First Check for Proper Maintenance. Make sure you have the right oil. Most cars now recommend 5W-20 for year round use, or synthetic such as Mobil One. Have your battery checked. In our area, most auto parts stores will do this testing for free.

What to do when your car wont start?

Try: Cycling the Key. If your car turns on but won’t start, turn on the dome light and watch it while you try to start the engine. If the light goes out, it’s a sign the battery is really weak—almost dead. To heat up the battery, terminals and starter, try the “key cycling” trick. The trick is to turn the key to the start position repeatedly about 10…

Why is your car hard to start?

Normal wear and usage can cause a hard start condition due to lack of fuel pressure, poor intake air management, false readings to the car’s computer or weak spark. Some of these repairs are simple and are included in the normal maintenance of the engine.

Why does my car won’t start when it’s cold?

When cars won’t start, it’s often because their engine oil has thickened in the cold, which increases friction and makes it harder for the starter motor to spin the engine. Cold, damp weather can sometimes play havoc on batteries as vehicle electrical systems have to work a lot harder.

Why is my boat hard to start after warm up?

My theory is a leaky carb float valve (is that a carb or injection motor?) or maybe primer valve, just slightly flooding the engine. At home on the muffs, engine is much easier to start without backpressure on the exhaust. On the water, lifting the hi-idle lever advances the timing, let’s it start right up.

Why is my riding mower hard to start when hot?

Higher temperatures create higher resistance to the flow of voltage, that’s why coils usually fail when the mowers hot, and starts working again when the engine cools. The enemy of electrical systems is moisture, so a mower should always be kept indoors in a ventilated area. These are the tools that make mower maintenance and repair easy!

Why does my car lose power when it gets up to temp?

My car has an automatic transmission. Heat causes electrical resistance in a circuit or component to increase. If you have a bad component that may have a bad internal connection, the increase in temperature could cause a voltage drop in the component. Also, heat can cause a crank position sensor to act up if it is starting to fail.

Why does my car run slow with no power?

If your oil is old, dirty or thick, this may cause the engine to run slowly and not be properly lubricated. Not only is this not ideal for your engine run quality, but this may also damage internal engine components. Adjust the carburetor’s choke lever — it may be closed or partially closed.

What kind of car won’t start when hot?

Won’t Start When Hot – SOLVED! I am so damn happy! I was here a couple years ago with a problem I just could not get solved. My 1996 2.4L Tacoma would not start when hot. After operating at temp, and leaving it for 10-20 minutes it would not start. It cranked hard, but would not start.

What does it mean when your car won’t restart?

When it won’t restart, it will turn over and crank and act like it’s not getting fuel. We have checked the coils, fuel pressure regulator and just now replaced the fuel pump. The car has 192,000 miles on it and is well maintained- tune up, etc.. When it won’t start, I have to put the gas pedal to the floor, and it will start.

Why does my Mazda MPV LX not start?

My Mazda MPV LX (2000) is doing the same thing. Starts most of the time, then after a few days or a week, after a short stop, it won’t start. Alternator was changed 6 months ago. New battery after the first non- start, new Neutral Safety Switch, too. Still didn’t help.

Why does my Mazda RX-8 engine not start?

At the time it sounded like the battery, because engine turned very slowly. Since, I’ve changed battery, checked all fuses, and engine still doesn’t start (though it engine turns fine). Would you please assist me with any info which will help me to determine what’s wrong.

Why does my RX8 not start after a hot soak?

RX8 No Start & Hard to Start when Hot soak. This RX8 came into our shop for diagnosing no start when it is hot. When you drive for a while and turn off the engine, then if you try to restart after a short period, it refuses to restart (cranks ok). After at least fifteen minutes to half an a hour wait the car will start.

What should I do if my Mazda RX-8 stall?

Try puting your car in neutral at the light – the vibration should stop or be barely noticeable. Mazda had a regional rep come out to look at my car, and his solution was to give me my 7th set of motor mounts. The vibration was a little better for about 10 feet, then it was back and worse than ever.

What to do if your Mazda3 won’t start?

One way to do this is to start your car and let the engine run for a while to recharge the battery. One thing to know: if the battery is over 4-5 years old, it may be completely dead, so it will not recharge and the car will not restart after you turn it off. In this case, you may need a new battery.

Why does my car not start when I try to start it?

But if the battery doesn’t have enough juice to start the engine or repeatedly needs a jump start, the problem may originate elsewhere, and jumper cables or even a new battery won’t solve the problem. Here are eight possible reasons your car won’t start.

When to restart a car with a temp problem?

If you pay close attention you will notice that when you make a short stop say 5 minutes that is when you have restart problems . As long as you hold idle for a few minutes with gas pedal everythings OK. I am almost certain a temp part is the problem. If my car sits 30 minutes or more never a problem. Any one witn addl thoughts. Please jump in.

Why does my car not start when it’s warm?

Several faults can cause your car not to start when warm. Photo in the Public Domain. If your car is hard to start when warm, you can trace the issue to one or more several potential faulty components, for example: Corroded or loose battery terminal or cable Corroded or loose engine ground connection

Why does my truck run bad when it is really warm?

If it is telling the ECM that your engine is cold but it is really warm, it can cause it to run poorly. Usually, if the ECT sensor was bad, the truck would restart after the engine cooled down. I wonder if the cat is plugged. You should remove the 02 sensor from the exhaust manifold and try to start it.

Can a car start when the starter is cold?

So yes, listen for it to prime next time. Well it looks as tho this post is about 10yrs old and you never got a answer. Other forums dont have a answer to this problem either talking about heat soaked starters as if it doesnt turn over when hot. The starter is fine hot or cold it just wont start the engine unless cold.

What does it mean when your car won’t start?

Today, I first drove it at 8pm, and the problem happened. A couple months ago, after driving for about 30 minutes or so, the engine would make a “Pfft” noise and would start popping and I would have to drive with 2 feet to keep the engine running. Did you do any testing, when the vehicle refused to start?

What can I put on my lower back to warm it up?

Other options to warm the lower back include hot water bottles and microwaveable cloth bags filled with rice. It’s important to apply heat for only a limited amount of time. Fifteen to 20 minutes of moist heat can often provide the temporary relief needed at the moment.

How often should I apply heat to my lower back?

It’s important to apply heat for only a limited amount of time. Fifteen to 20 minutes of moist heat can often provide the temporary relief needed at the moment. For chronic lower back pain, all-day heat wraps are available and can be worn and reheated throughout the day for constant relief.

When does your car run hot or cold?

If you are like most drivers, our guess would be almost never. Most drivers look at their temperature gauge so rarely that many vehicle manufacturers don’t even include temperature gauges any more but just lights that will come on if your car is either extremely cold or extremely hot.

What can I do to keep my car from running hot?

To give your cooling system a boost, add BlueDevil Engine Cool to your coolant to give it that extra cooling capacity to keep your car from running hot. You can find BlueDevil Engine Cool at any of our partnering local auto parts stores like: AutoZone Advance Auto Parts

Why does my GM Truck start so cold?

Look up piston slap to study it more its mostly from the short piston skirts that allow the piston to rock around more when cold. Also different oils help, i run moble 1 truck 5w30 in my truck with 116k on it. I have heard that gm top end cleaner and the 3m kits work well.

What to do when your engine thermostat is stuck?

When an engine is cold, the thermostat should be closed, thus bypassing the radiator. Warm (not hot!) engine test: Open hood and remove radiator cap. Start engine. Observe coolant action. It should be swirling vigorously. When an engine is warm, the thermostat is in the open position.

Why does my car heater take so long to heat up?

Time how long it takes the engine to warm up enough to produce heat when the heater is turned on. If it takes more than five minutes for the heater to produce heat, it is a sign that the thermostat is stuck open, allowing all the coolant to flow all the time.

Why does my car AC blow cold air then blow warm air?

But that cold air turns warm fairly soon after because the high side pressures build to the point that the high pressure switch shuts off the compressor clutch. Once pressures equalize, the high pressure switch allows the compressor to start up again. The cycle repeats over and over, providing a short period of cold air, followed by warm air.

Why does the Cold motor start longer than the warm motor?

Reason being, with bleeding injectors, the longer they sit, the more fuel gets dumped into the cylinder (until all the pressure is bled off). The OP would see the issue more on the cold side than on the warm. Also, there shouldn’t be any “gaps to fire” in the injectors. If there are, they wouldn’t fire at all.

What kind of car stalls after engine heats up?

The Chevrolet Cavalier is a compact automobile produced from 1982 to 2005 by General Motors. car starts and runs fine until engine heats up to operating tempature, then it stalls, it will restart but keeps stalling until engine cools down. What can cause this? Answered!

Can a bad ECM cause a car not to start?

4. Car Not Starting. A bad ECM may lead to a vehicle that won’t or is difficult to start. If the ECM fails completely, it will leave the vehicle without engine management control, and will not start or run as a result.

What is the ECM in a car called?

As the name suggests, ECM is all about engine performance and can help in the diagnosis of engine and transmission problems. The ECM is also sometimes referred to as the PCM (power-train control module), which consists of the engine control unit (ECU) and the transmission control unit (TCU).

What are the signs of a failing ECM?

Common signs of a failing PCM/ECM/ECU include the Check Engine Light coming on, engine performance issues, and the car not starting. 1. Check Engine Light Turns On 2. Engine Stalling or Misfiring 3. Engine Performance Issues 4. Car Not Starting

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