Question about 1995 Jeep Grand Cherokee

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Weak Spark to coil

'95 Jeep GC 4.0 (6cyl)-- was running and just died. Tries to crank but does not turn over. Checked fuel pump with "QuickStart" and no go. Have spark to coil but it is very weak. Any suggestions?

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  • jeancfisher May 27, 2009

    (Just now realized I should've said "weak spark FROM coil" rather than "TO coil" -- duh.)



    Thanks for the word, Jery, am R'nRing both Crank Sensor and Coil today... We'll see, I guess.



    Am thinking of lowering tranny to get to sensor on bell housing instead of going through all the changes I've read others went through to get to it (have a lift). Will see how that works out, as well.



    Anyhoo, thanks for answering back -- 'purshee-ate it!







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My dad had a 93 GC and he had to replace somekind of crankshaft sensor then it was fine ever since. I guess those inline 6's are known for that.

Posted on May 26, 2009

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Change Crankshaft Position Sensor. No guarantee, but one very good possibility.

Posted on Jul 09, 2009

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1 Answer

Ignition Coil


Look into the crank sensor or an ecu that needs repairing. Those two, being bad, will cause a no spark condition in your jeep.

Mar 31, 2012 | 1993 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

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

2 Answers

Car died while driving checked fuel pump ok and


The spark is to weak change the crank sensor.If that does not solve the problem then its the coil pack that needs to be replaced

Dec 27, 2009 | 1999 Ford Contour

1 Answer

94' Jeep Gc shuts off while driving. wont restart for hours!!


Sounds like either the fuel pump is going bad and overheating, or, the crankshaft position sensor is going bad...both items will give similar symptoms. Both are not terribly difficult jobs but are time consumers. Before doing either repair, you need a code scan and better diagnosis than I can give you here without a hands-on examination. Fuel pump can be diagnosed by spraying carb cleaner into the throttle body while cranking in "no start" condition. If engine fires up then stalls it's a pump problem. If not then it's a spark control problem.

May 02, 2009 | 1994 Jeep Grand Cherokee

1 Answer

95 Jeep Wrangler will turn over but not start


COULD BE A COUPLE OF THINGS. NO SPARK COULD BE A BAD COIL. I DON;T KNOW IF YOU HAVE THE OLD OR NEW TYPE OF COIL. YOUR NO FUEL PROBLEM COULD BE THE FUEL PUMP IN THE FUEL TANK. JEEPS WERE NOTED FOR THIS PROBLEM. THERE IS A CAP YOU CAN TAKE OFF THE FUEL RAIL IF IT IS FUEL INJECTED AND TURN THE KEY ON TO SEE IF THE PUMP IS WORKING. BE CAREFUL WHEN YOU DO THIS AS FUEL WILL SPRAY EVERYWHERE IF THE PUMP IS WORKING. THAT WILL BE A FIRE HAZARD IF CONTACT IS MADE WITH AN ELECTRICAL SPARK. USE CAUTION WHEN PERFORMING THIS ITEM.

Jan 24, 2009 | 1995 Jeep Wrangler

2 Answers

1996 jeep GC died while driving wont start or even sputter


check your fuel pump relay underneath the hood in your fuse panel box and also check your fuse to your fuel pump it may not be making good contact . so good luck

Dec 27, 2008 | 1996 Jeep Grand Cherokee

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