Have a 1996 Jeep Cherokee Country that will not start. The fuel pump has already been checked as well as the battery, what would be the next step/thing to fix??
An engine needs five things to run;
One of these is lacking on your Jeep. Diagnosing a problem is just simple elimination.
You can be pretty sure the motor is getting the air it needs, unless you haven't changed the air filter for a loooong time. You can be pretty sure the motor has compression, as this problem takes a long time to manifest, and usually occurs in only one or two cylinders first. That leaves Fuel, Ignition, and Timing. Chances that something went wrong with the timing of the Spark or Cam are pretty nil, it just doesn't go bad all by itself. So, Ignition, or Fuel.
First, you should check that you have the proper spark (ignition).
This is usually the problem. Just remove one of the plug wires, insert a screwdriver into the wire end, and hold it near one of the engine's brackets. (about 1/4 inch) Hold on to the screwdriver's handle, not the metal part, or you may recieve a very hard shock!! And have someone crank over the motor for you. You should see a spark.
Is it sparking at all? Is the spark a bright white/blue color? If no spark, or if the spark is yellow or orange, there is your problem, and you will have to get some new Ignition Components. If you have a brilliant blue spark at the wire, and the car still won't start, then check the Spark Plugs. Has it been awhile since you changed them? Pull one out, connect it to its wire, and lay it on a metal engine part, then have a friend crank over the engine for a moment. Again, the spark should be brilliant blue/white. If not, then replace your plugs. Once you have established that there is GOOD spark, and the motor still won't start, then go back to Fuel.
While the pump in the tank may be working fine, the Inline Gas Filter may be plugged.
Your Multi-Port Fuel Injected engine has to have the correct amount of fuel getting into the fuel Rail, and a plugged filter might be the culprit. There is a way to check that Fuel is getting to the Fuel Rail. On top of the motor, there will be a long tube, with what looks like a Tire Valve in it. It will probably have a little black screw off cap on it. Turn the key to the 'Run' position. which will pressurize the pump, then, turn the key back to the 'Lock' position, and then MOMENTARILY, and I mean MOMENTARILY (like for only a split second) depress the little valve. Gasoline should spurt out. If not, then there is the problem. Be careful, as you are going to spurt raw gasoline on to the engine, although a very small amount, which is a fire hazard. Make sure you do this in a well ventilated place with NO IGNITION sources.
I must emphasize that if you are not comfortable with doing this (or any of these) procedures yourself, then I suggest taking your Jeep to a Qualified Mechanic.
I hope this helps you.
Jun 21, 2011 |
Jeep Cherokee Cars & Trucks