diesel car struggles to start but runs fine

The fuel system needs to hold pressure to the fuel injection in order to start after sitting. The forgoing assumes that as you say the battery.

How To Fix A Diesel That S Hard To Start Cold Cost Effective Maintenance

Or maybe an injector or two issue not atomising quite right.

. The car ran perfect before i started meddling with itnow I have a problem. Other problem causing factors are a bit more complex but can be easily fixed or avoided. Rod-Knox September 19 2016 243pm 10.

By heating up the air twice or more you have a far better chance of it. Problems with the engine intake include faulty fuel injectors throttles and fuel pressure regulators and sensors. Worn injectors not atomizing correctly.

If i leave it it will take up to 5-10 turns of the key to get it started. If it under 123 V then get a new one. This can be caused by a weak battery or starter motor.

If your engine struggles when it is cold but starts fine when hot and the car runs fine afterwards with no loss of power I would check the following. The simplest test would be to take the fuel line off the carb and put it in a jam jar. Some systems will run the fuel pump for a short period when the drivers door is opened or when the key is turned to the ignition stop before being turned to crank.

Up to 8 cash back There are many causes of hard starting but illustrative ones are a faulty engine coolant temperature switch sensor malfunctioning idle air control IAC valve vacuum and EGR leaks inadequate fuel delivery or pressure clogged fuel filter injectors and contaminated or old gasoline. If either of those wires are making a poor connection or have become broken or corroded they could be giving a weak signal or insufficient power for your car to start. Turn the ignition switch to the run position so that the dash lights come on for two seconds and turn the ignition switch off.

If your car is hard to start when warm you can trace the issue to one or more several potential faulty components for example. Slow to crank over. Excess carbon around glow plugs or spark plugs.

Looking like a cylindrical coil of wire basically solenoid is a component to bridge the connection and allowing power to flow from the battery to the starter. However it could be forced to start by switching the ignition on and off for ages. Check your battery with a voltmeter from the posts.

A loss of pressure over time will cause the fuel not to be at fuel injectors when starting. But after running for lets say 8mins or moreand you switch off the engine. In this time it wont respond to revs.

If this isnt happening for some reason you may be having to wait until the fuel pump provides enough pressure at the fuel rail to start the vehicle. They make up more than 1 of the cars we go out to which wont start. Maybe there is something wrong with it causing it to not get off cold start mode which is fine when the engine is cold but once it warms up floods the engine and makes it hard to start.

The problem can be in the solenoid or electrical but for now it runs fine with the plunger removed. It will take you roughly 30 secs or more before the engine will start. So the fuel pump doesnt cycle enough times to reprime the fuel system.

Carbon build up etc preventing ignition. Hard to start when cold can be the mixture is too lean. To remove the plunger just unplug the connector unscrew the solenoid from the injection pump and remove the small circlip that holds the plunger in there.

Such cleaning should be part of routine maintenance. This issue only when starting cold seems more likely to be lack of pre heat where ever that engine has it. Turn the ignition on and see how much fuel the pump is pumping you shouldnt need much on a carb engine so.

One or more electrical sensors. Ill try to zero in on the most common ones for diesel engines. There can be many reasons for a vehicle not starting in cold weather and some can be as simple as a weak battery that needs replacing.

You will have a very hard time to start it again since the starter will just keep on cranking fast good batt and starter But thenengine just wont fire up that easily this time. Diesel engines without glow plugs would probably start up in warmhot weather but would have no chance in the winter unless it had only just been switched off. Corroded or loose engine ground connection.

Thats because the fuel pump only runs for a second or two and then shuts off when the ignition switch is turned to the run position. Engine control system problems. When you turn the key at least in the Jeep you could hear the glow plug relay switching on and off.

After that it will start 8 of 10 times and run for the short period of time described. Up to 8 cash back The most common problem encountered that will cause this problem is a fuel pump in the fuel tank not holding fuel pressure up to the engine for any length of time. If you struggle to start the car and have also noticed a whining or sputtering from the car recently it could be a problem with the fuel system.

If it is an EFI which just about every car has been for a long time car maybe the car has a bad 02 sensor if it is a very old car it could be a carburettor car with a carburettor problem. If there is not any sound from the starter when you turn the key then it is highly that the solenoid is bad. If it reads 127 V or above then the battery is good.

If that is the case you can try replacing the wires or cleaning the connections. Consider these the low hanging fruit. George_San_Jose1 September 22 2016 307am 11.

That is why your car struggles to start if solenoid is broken or worn out. Vapor lock in the fuel system. Corroded or loose battery terminal or cable.

Often a thorough cleaning of the throttle body including the idle air control valve passages will correct that problem. The car will start and run fine but only for 4-5 seconds at a time. Sometimes this issue makes your car hard to start but runs fine once it gets going.

An engine needs a minimum cranking speed to start if the starter or battery is weak the engine cranking RPM will be low which causes the engine to build compression slower and make it harder to start. As in any machine there can be many reasons for poor or absent performance. Unburnt diesel in the exhaust will show as white smoke so any of these things can cause it.

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