Question about 1998 Ford Explorer

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Vehicle turns over but does not catch and start. We put a new starter on, took the battery out and had tested, it is good, put a new fuel filter on. When you unhook the line opposite where the fuel filter is, no gas comes through. I do not see wires to be able to tell if their is voltage to turn the pump on when the ignition is engaged. Is this a fuel pump problem or possibly something else. This is a 4.0 6cyl engine

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Hi!!
Every time you turn the key to RUN position, you should be able to hear a humming noise that lasts 2 seconds coming form the fuel tank, it is the fuel pump kicking in. I you don't hear any noise at all, on the engine compartment fuse box you'll find the fuel pump relay, swap it with another relay with the same numbers on top, like the AC Clutch or Cooling Fan relays, have someone turn the key to RUN while you hear and feel the relay, you should hear a click and feel it, if you do, try to start the vehicle, if you don't, check starting system wiring.
If you hear the click and the pump still do not work, check wiring at the fuel pump electrical connector, check for12 volt using the ground cable on the harness, not from the chassis. If 12 v is present when the key is turned to RUN, your fuel pump may be defective.
Keep me posted!!

Posted on Sep 12, 2010

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My starter was replaced early this year but I am having difficulty starting the vehicle, it seems as if it doesn't want to catch.


If the car is turning over good, but just won't start that is not your starter. You could have a weak fuel pump, need a good tune up or a problem with spark. If you keep turning it over without starting you will ruin your starter. A fuel injcted car should start righ away. Save the cost of another starter and have it diagnosed.

I would start with testing for spark, then fuel, then compression.

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You may have to replace your spark plugs. I recommend you remove two or more plugs and check them for carbon build-up that would prevent a good spark. Also check your air filter, if these dont solve your problem you may need to replace your fuel filter which should be located inside the drivers side frame rail.

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1994 S10 Blazer Tahoe starting problems


Well, obviously someone didn't tell you the truth because spraying into intake doesn't make the vehicle turn over any better. You have ignition or fuel delivery problem. Start by taking fuel line off at intake and crank engine a couple times catching any gas in a cup or something. If none, then trace fuel line back and under vehicle til you find filter. Should be under driverside midway back on inside of frame. Change this and try test again. If no gas, see if fuel pump is on motor(mechanical pump). Change this and test again. If not on motor then it's in gas tank(electric pump). Most cases the tank has to be lowered to take out pump, careful not to drop, dent or make sparks. Some came with access through the floor so check that first. Normally you can hear an electric pump come on when you turn the key. Good Luck

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Replace AC fan motor now car doesnt turn over right away.


You can try this to verify that the starter is good or bad.

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Starter Testing Starting System Voltage Drop Tests NOTE: The battery must be in good condition and fully charged prior to performing this test.
There are three area of the starter motor circuits that voltage drop test can be performed on. These include:
  • The starter feed circuit
  • The starter ground circuit
  • The starter solenoid.
Starter Feed Circuit
  1. Disable the fuel system by removing the fuel pump fuse or the fuel pump relay.
  2. Verify that the vehicle will not start.
  3. Connect the positive lead of a voltmeter to the positive terminal of the battery.
  4. Connect the negative lead of a voltmeter to the starter B+ terminal.
  5. Turn the ignition key to the START position and note the voltage displayed on the voltmeter.
    • Ideally, there should be no more than 0.1 volt drop for each connection displayed on the voltmeter. No voltage should be consumed by the vehicle wiring
      1. If the battery cable connects directly to the starter motor there should be no more than a 0.2 volt drop measured
      2. If the vehicle uses a starter solenoid between the battery and the starter motor terminal there should be no more than 0.4 volt displayed on the voltmeter
Starter Ground Circuit
  1. Disable the fuel system by removing the fuel pump fuse or the fuel pump relay.
  2. Verify that the vehicle will not start.
  3. Connect the positive lead of the voltmeter to the case of the starter motor.
  4. Connect the negative lead of the voltmeter to the negative terminal of the battery.
  5. Turn the ignition key to the START position and note the voltage displayed on the voltmeter.
    • Ideally, there should be no more than 0.1 volt drop for each connection displayed on the voltmeter. No voltage should be consumed by the vehicle wiring
      1. If the battery cable connects directly to the starter motor there should be no more than a 0.2 volt drop measured.
Starter Solenoid
  1. Disable the fuel system by removing the fuel pump fuse or the fuel pump relay.
  2. Verify that the vehicle will not start.
  3. Connect the positive lead of the voltmeter to the case starter B+ terminal.
  4. Connect the negative lead of the voltmeter to the lug (the starter M terminal) that connects the starter solenoid to the starter motor.
  5. Turn the ignition key to the START position and note the voltage displayed on the voltmeter.
    • Ideally, there should be no more than 0.2 volt drop across the starter solenoid displayed on the voltmeter.
In general, there should be no more than a 1.0 volt drop throughout the entire starter motor feed and ground circuit. Any voltage drops measured in either the feed or ground circuits after connections have been cleaned will require replacement of the affected battery cable. Typically, any voltage drops measured in the solenoid are repaired by replacing the starter motor.

I looked at all the steps for replacing the blower motor...they should not have messed with anything that would have affected the operation of the starter.

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what you are describing is a slow start. Start your vehicle and remove the positive battery cable. if the truck dies than change your alternator. your alternator may be going bad not allowing the battery to keep a charge through the night.

If it is good than remove your starter and have it tested. any auto parts store can test it.

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