My car wont start. the check engine light is not on when I try to started It 'll cranck but wont start

CRANCKS AND WONT START OR WONT CRANCK AT ALL?BATTERY OK?LET ME KNOW..

Hi there:
You will have to pinpoint what the engine is missing... spark / fuel / compression

All three of these are tested when the engine is being cranked over. There are two way of checking for fuel. Fuel pressure and fuel trigger. Both are very important and must be present for the engine to start. Fuel pressure is self explanatory. You just hook up the gage and see what the reading is. Fuel trigger is check with a noid light. The injector gets unplugged and the noid light gets plugged in to the injector clip. With the engine cranking over, this light must blink. This is the signal to the injectors from the computer. You can have all the fuel pressure in the world, but it wont matter if the injector is not pulsing gas into the cylinder like it should.

Compression tester, spark tester, fuel pressure gage and noid light are all accessible at your local auto store. All three tests play a very important part in diagnosing a no start condition. Be extremely careful when doing these tests.

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If a starter is able to crank the engine but it won't start you usually have either an electrical or fuel problem. It's also remotely possibly that it's compression.

If an engine has proper fuel, spark and compression, it will start when you crank it. So your challange is to find out which part isn't working right. Start with fuel. Spray a little starting fluid into the air intake while someone tries to start the engine. If it starts briefly when you're spraying starting fluid, you probably have a fuel delivery problem. That could be injectors, fuel pump, fuel filter, relay, fuse... who knows what until you check into it.

If it doesn't start with starting fluid, check the spark. Pull a plug wire and attach it to a spare sparkplug and set the plug on a solid metal part of the engine. Have a helper crank the engine while you watch the plug. If you have a good spark, it might just be out of timing.

In any case, you'll need to start isolating the problem. Find out which part isn't working then you'll know what to replace/repair.

Hello! You'll need a OBDII scanner to identify the trouble code that has the Service Engine Light on...Once you have that code send it to me and i'll fix your vehicle...Saailer

I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

Won't-start symptoms

Your car may not start for a number of reasons. The following list outlines the most common circumstances and tells you what action you can take to try to remedy each situation:

• The car is silent when you turn the key in the ignition. Check the battery terminal cable connections If they look very corroded, force the point of a screwdriver (with an insulated or wooden handle) between the connector and the terminal post and twist it to lodge it firmly. Then try to start the engine. If it starts, you need to clean or replace your cables.

• The car makes a clicking noise but won't start. This sound usually means a dead battery. If not, check the wiring to and from the starter for a loose connection.

• The car cranks over but won't start. Check the fuel supply to your engine. If that's okay, check whether the electrical spark is getting to your spark plugs.

The engine starts but dies. If your car has a carburetor, check your carburetor adjustment and your choke to see whether the choke is first closing and then opening. If you have fuel injection

What happenes when you try to jump start the vehicle? If it starts - then it is most likely the battery or alternator. If it doesn't start then the solenoid or the starter or the engine. To get it down to the starter or engine - disconnect the serpentine belt and turn the crankshaft with a wrench. If it turns - then it is your starter/solenoid.

Try having the codes pulled so you'll get an idea or know whats causing the check engine lights. Then you'll know how to proceed. In my opinion this just may be an oxygen sensor failed.

Im not really understanding everything that youre saying, but if it just all of a sudden wont start and youre sure that it doesnt have spark, you may want to check to see if the timing belt broke. One way to check, is to take the oil cap off, and have someone try and start the truck. While its trying to start, shine a light into the valve cover and see if the cam is turning. If its not, your timing belt broke and if that broke, youre not going to get spark because the distributer only spins when the cam spins. Good luck!

check crankshaft sensor hope thishelps!

are they the same engines? and i mean exactly the same? if the arent the same maybe check and look at the starter ring gear and count the teeth...also check the camshaft sprocket...is it different?