Question about 2004 Jeep Liberty

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The jeep is turning over, just not cranking. Could that be a spark plug issue?

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Pull you plug wires 1 at a time while someone cranks the engine. hold the wire close to the engine. you should see some spark from the boot. if all plugs DONT have a spark,then the ECM is bad. if all DO have a spark,then listen for the fuel pump powering up,this will make a whirring sound from the back of the vehicle for about 3 secs. if you dont hear this sould,then the fuel pump is bad.

Posted on May 02, 2010

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3 Answers

Why is my 2003 Jeep Liberty- Starter turning, but eng won't start (intermittent problem)?


you didnt stated the symptoms correctly

it either cranks or it does not.
that means the starter ACTUALLY turns the cranks shaft over
robustly.
the crank shaft damper pulley is the clue to this , it turns or not.
if it always turns this is a :
cranks ok but wont start.
so, that means tune up the engine,
1: low battery voltage (slow cranks)
2: never tuned up this decade?.
3: bad fuel.
4: weak spark at any of the spark plugs, sure all must be good.
5: flooding, (wet spark tips)
6: fuel starvation.
7: any of 50 other engine mech. issues,(burned valves, is 1)

Sep 02, 2014 | 2003 Jeep Liberty

1 Answer

2001 jeep grand chorkee long crank times replaced crank sensor cam sensor and fuel pump cold starts only 4.7 engine


Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.


To confirm the problem, the basic troubleshooting is required.


Click this link below and follow the troubleshooting:------

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

---------

This will help.

Thanks.

Feb 25, 2012 | 2001 Jeep Grand Cherokee

1 Answer

1994 jeep grand cherokee doesnt like to start when warm


Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.


To confirm the problem, the basic troubleshooting is required.


Click this link below and follow the troubleshooting:------

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

---------

This will help.

Thanks.

Feb 12, 2012 | 1994 Jeep Grand Cherokee

1 Answer

Engine won't start


If you turn the key to ON position and its not cranking at all,then its battery fault.If its cranking but not starting at all.That means the starter is also getting power.So if its cranks but not start then there are few possibilities to be checked.But if its not craning and no noise then battery and starter are to be checked.In other case :----

A jeep that cranks over but doesn't start, in many cases will be due to a bad fuel pump, a broken timing belt, an inoperative cam sensor or crank sensor. Also these problems are related to faulty spark plug. Check the spark at spark plugs when you start the jeep. Do you notice any spark. Actually you should see. If in case there is no spark then it's a spark plug problem. Also the coil pack gives power to spark plug. So check the voltage at coil pack. It will show 12 volt. If there is no voltage noticed at coil pack then its faulty coil pack that has to be replaced. If all the possible options checked out ok then check the jeep starter. The starter gets power from battery to start the jeep. If the starter is faulty then it will not let the jeep to start. Also check and confirm that there is fuel in the jeep. If its very low fuel then in some cases this causes the problem. Also check and confirm that fuel pump is functioning properly and the fuel filter is not clogged. One of the easiest ways to check for a fuel pump related problem is to spray a little starting fluid into the air intake while trying to start the jeep. If the jeep starts momentarily, then there's a good chance the fuel pump is not working or the jeep is out of gas. You can also listen for the fuel pump's humming sound when the key is first turned on. Also if a inoperative fuel pump is suspected, a good technician will always check to verify there is power and ground being supplied to the pump, to eliminate the possibility of a bad relay or electrical issue. Fuel pressure can be checked with a pressure gauge and if there is pressure, pulse can be checked at the fuel injectors in several ways including the most common, with the use of noid lights. If the injectors don't have pulse the engine won't start. ---------- This troubleshooting tips will help you to solve the problem. Thanks. Helpmech.

Feb 01, 2011 | 2000 Jeep Grand Cherokee

1 Answer

1994 jeep grand cherokee won,t start. no fire on the spark plugs.


these jeeps have a problem with the crank position sensor which cause most all of the issues with no spark condition, it is located on top of the transmission where it bolts to the engine(bellhousing)

Jan 30, 2011 | 2000 Jeep Grand Cherokee

1 Answer

I was driving my 1993 Jeep and it turn off will turn over but won't what could it be ?


Check for blown fuses. You need to find out if it is getting fuel and spark. To check for fuel, crank the engine for about 10 seconds, Remove a spark plug. If the plug is wet and smells like gasoline, then the fuel is ok. It the plug is dry, then you are not getting fuel. While you have the plug out, reattach the spark plug wire to the plug, lay the plug down somewhere on the engine so you can see it when you crank the starter. If your getting spark, there will be a spark jumping between the electrodes on the end of the spark plug as you crank the starter. Let me know what you find and we will try to find out what the problem is.

Jan 13, 2011 | 1993 Jeep Wrangler

1 Answer

Crank, won't start problem. I checked the spark plugs on Jeep 98. Looks good. Could it be the crank sensor or starter coil?


Yes it is very much possible.But there are many other possibilities too,including starter and spark plugs issue.

If your engine cranks normally but will not start because it has no spark, or it stalls and won't restart because it has no spark.

You can also do a test to confirm the problem .The procedure to do the test is as follows:---

If your engine has spark plug wires, disconnect one of the plug wires from a spark plug and place the end of the wire near a metal surface on the engine. Then insert a small Phillips screwdriver into the end of the wire (the plug boot), or a small bolt or nail to provide a conductive path. Then crank the engine and look for a spark to jump from the screwdriver, bolt or nail in the end of the plug wire to the engine. If you do not see a spark, there is an ignition problem.

OR-----------

If your engine has a coil-on-plug ignition system with no plug wires, In that case remove one of the coils from the spark plug and insert an old spark plug, a spark plug tester or a screwdriver into the end of the coil. Ground the spark plug or plug tester to the engine, then crank the engine and look for a spark. No spark indicates an ignition problem.If the engine has no spark, check for voltage at the coil positive terminal when the ignition key is on. If NO voltage, then problem is on the trigger side of the coil (pickup, crank sensor, ignition module or primary wiring circuit).

But If there is NO voltage at the coil itself, then in that case the problem is on the supply side (the ignition switch or ignition wiring circuit).-----------------

Jeep cranks but no start:----------------

A jeep that cranks over but doesn't start, in many cases will be due to a bad fuel pump, a broken timing belt, an inoperative cam sensor or crank sensor. Also these problems are related to faulty spark plug. Check the spark at spark plugs when you start the jeep. Do you notice any spark. Actually you should see. If in case there is no spark then it's a spark plug problem. Also the coil pack gives power to spark plug. So check the voltage at coil pack. It will show 12 volt. If there is no voltage noticed at coil pack then its faulty coil pack that has to be replaced. If all the possible options checked out ok then check the car starter. The starter gets power from battery to start the jeep. If the starter is faulty then it will not let the car to start. Also check and confirm that there is fuel in the jeep. If its very low fuel then in some cases this causes the problem. Also check and confirm that fuel pump is functioning properly and the fuel filter is not clogged. One of the easiest ways to check for a fuel pump related problem is to spray a little starting fluid into the air intake while trying to start the jeep. If the car starts momentarily, then there's a good chance the fuel pump is not working or the jeep is out of gas. You can also listen for the fuel pump's humming sound when the key is first turned on. Also if a inoperative fuel pump is suspected, a good technician will always check to verify there is power and ground being supplied to the pump, to eliminate the possibility of a bad relay or electrical issue. Fuel pressure can be checked with a pressure gauge and if there is pressure, pulse can be checked at the fuel injectors in several ways including the most common, with the use of noid lights. If the injectors don't have pulse the engine won't start. ---------- This troubleshooting tips will help you to solve the problem. Thanks. Helpmech.

Jan 07, 2011 | Jeep Cherokee Cars & Trucks

1 Answer

95 jeep wrangler cranks but won't start. replaced crank shaft sensor, coil, plugs. battery is good.


After you crank it for a while, take out one of the spark plugs. If it is dry then you have a fuel issue. If it is wet and smells like gas you have a spark issue. Find that out and report back and then we can get more specific.

Dec 19, 2009 | 1995 Jeep Wrangler

1 Answer

My Jeep sounds like it's going to start but never fires up!??


pull a plug at a time to see if ur getting spark use spark plug pliers takes 2 people,turn over u should see a flash and hear a popping,make sure the coil is good,fuel pump,tap on the fuel filter to clear any debrease,do theme 1 at a time so u can diagnose the issue,make sure u got enough cranking amps as well good luck hope this helps

Aug 29, 2009 | 2000 Jeep Grand Cherokee

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