Question about 1987 Nissan Pathfinder

2 Answers

Engine rotates but won't start

Alternator good,coil good,rotor good.But no spark from plugs.I've got compression from cylinder.

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 15 Answers

Either The CoilPack, or Ignitor Module, or engine position sensor (in distributor)

Posted on Jan 25, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Governor:

    An expert whose answer got voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 99 Answers

Sounds like the coil pack

Posted on Dec 01, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

1993 Subaru loyale no compression, have spark at the coil just won't start


The engine can't run without compression in the cylinders. The plug will still spark, but without a compressed air/fuel mixture to burn and power the cylinder down, the starter will just keep spinning the engine over, cranking forever and not starting.
Check if your timing belts are good and not broke. Cylinder compression is dependent on good piston rings, intake and exhaust valves that open and close at right times and that seal good when closed, and a head gasket that seals up the cylinder from leaks where compression could blow into the water passages, or oil passages, or to outside of engine.
If the timing belts are good, a leak-down test of each cylinder will pinpoint where compression is lost.
Good luck with the Sube, great cars, great engines, but the head gaskets are a common problem.

Jun 11, 2013 | Cars & Trucks

1 Answer

How to install a distributer on a 2000 mazda millenia 2.5L


You'll need to rotate the engine only in a clockwise direction, to get it to TDC on the compression stroke. When the engine is on the compression stroke, both valves to that cylinder are closed completely.

You can hold your finger over the #1plug hole with the plug removed, and as the engine is turned, you will notice pressure building, use a long rubber hose or something you won't drop into the cylinder, to put into the cylinder to feel the piston as it comes up to the very top. If you go past it, rotate the crankshaft 2 full times (almost) to get back to the TDC position.

There is also a mark on the crank pulley that will tell you when you reach TDC. Identifying the compression makes sure it's on the compression stroke, not the exhaust stroke. The engine turns 2 full turns for one turn of the camshaft.

Once you have TDC on the engine, rotate the distributor in your hand, to where the rotor will be pointing at the #1 position where it would send spark to the #1 spark plug wire & plug. Install and adjust as necessary to get the best idle, then hook up your timing light to set it to the factory specs.
Good luck!

Mar 30, 2012 | 2000 Mazda Millenia

2 Answers

I have a 93 dodge caravan van that wont start it wants to turn over but won't.


For an engine to run, you need three things to happen inside the engine, compression, fuel and ignition, without any one of these components the engine will not run.
  • Compression - Engine compression caused by crankshaft rotation and pistons moving up and down inside the engine block. If the timing belt or timing chain fails it will cause the camshaft to become out of correlation with the crankshaft or allow the camshaft to stop rotating. Either of these conditions will cause the engine to lose compression and sometimes cause internal engine damage.
  • Fuel Delivery System - The fuel system includes: fuel pump, fuel injectors, pressure regulator, fuel filter and pressure lines. This system is used to supply fuel under pressure to the fuel injection system, the lack of fuel pressure or volume will cause the fuel delivery system to fail and the engine to stall or not start.
  • Ignition Spark Delivery System - The ignition system components include: spark plugs, spark plug wires, distributor (if applicable), crankshaft angle sensor, camshaft angle sensor, ignition coil, ignition module, knock sensor and ECM (engine control module). The engine relies on the ignition spark to be delivered to the combustion camber at the correct time. If the ignition spark stops or is delivered at the wrong time the engine will not run or run poorly.
If Your Engine Cranks but Does Not Start Follow this Troubleshooting Guide
Most vehicles operate by the same principle; basic troubleshooting procedures apply to most cars.
  • Step 1: Anytime you have a problem with electronically controlled components such as an engine, transmission, ABS brake, or SRS (supplemental restraint system, Air Bag) inspect all fuses using a test light and check the under hood power distribution center and under dash fuse panels. If all fuses test ok continue to the next step.
  • Step 2: To check for problems with electronically controlled components such as an engine, transmission, ABS brake, or SRS (supplemental restraint system, Air Bag) and the fuses test ok a trouble code scan is needed to identify any system trouble. Use a simple scanner tool to retrieve trouble codes and see if they relate to the specific problem, like a crank angle sensor failure code. If the trouble code present does not pertain to the immediate problem like an EVAP code ignore it until a later time, after the car is running. The reason we repair non-related codes after the engine is running is because sometime false codes can be triggered by the engine not running. Once the engine is running again the code present might cycle and turn itself off. You might say "if the engine doesn't run shouldn't it have a trouble code?" Sometimes conditions occur that will not be detected by the computer, example: if the fuel pump fails the computer cannot detect the failure, so the engine doesn't start and the computer thinks everything is ok with no codes. If no trouble codes are present proceed to the next step.
poster.jpg?1292981965 Scan for Trouble Codes
  • Step 3: The spark plugs in your engine are used to ignite the compressed fuel air mixture. If the condition of the spark plugs are fouled by excessive fuel or carbon the engine will not start, backfire or run rough. Remove all spark plugs to inspect their condition. Please use this spark plug condition reference guide to see how the spark plugs are operating.
  • Step 4: Determine if the engine has compression, this can be done a number of ways but the most complete method is to perform a compression check. Remove the spark plugs and perform a compression test on one cylinder. If one cylinder has compression then the remaining cylinders usually will be close to the same. Crank the engine over about 5 seconds, normal compression readings should be between 125 psi and 160 psi on each cylinder. If no or little compression exists additional tests will be needed. The most common reason for an engine to lose compression is a timing belt or timing chain failure. If low or no compression exists remove the oil fill cap and observe camshaft rotation when the engine is cranked over. If no rotation exists the timing belt or chain has failed. If your engine has a timing belt and you cannot see the camshaft easily remove the upper bolts to the timing cover and gain visual access to the belt, recheck cam rotation by cranking the engine over. Sometimes a timing belt or chain can jump causing the camshaft to lose correlation with the crankshaft and therefore causing low compression. The best test for this condition is to remove the timing belt/chain cover and inspect timing marks. If the compression is ok proceed to next step.
  • Step 5: Test the ignition system output, ignition systems can vary in configuration but operate on the same principal. Ignition systems can consist of a coil, pick up coil, crank angle sensor, cam angle sensor, spark plugs, spark plug wires, distributor cap, ignition rotor and a distributor and any variations of these components. An ignition coil is a voltage stepper coil that transforms a low voltage (12 volts) signal into tens of thousands of volts needed to jump the gap of the spark plug. This coil is activated by an ignition module triggered by using the camshaft/crankshaft angle sensor; timing is adjusted by the ECM (computer).
    This primary electrical signal is generated by the ECM which calculates spark timing by using a variety of sensors including coolant temperature, mass air flow, and oxygen sensors. To perform a basic ignition output test you must have a test light and follow this ignition system output test video.
    crank_trigger_ignition_system.jpg
    Distributor less Ignition System Configuration
    Some ignition systems have a coil for each spark plug. This is called Direct Ignition (DI) system; there are no plug wires in this system just individually controlled ignition coils. The amount of coils or spark plugs depend on the number of cylinders the engine is designed with, example: four cylinders, six cylinders etc. To perform a basic ignition output test you must have a test light follow this ignition system output test video and substitute the ignition coil for the plug wire (Note: leave the coil trigger wires connected).
    coil_over_plug.jpg
    Coil Over Spark Plug
    If the ignition system test is weak or non-existent test the car fuses, both under hood power distribution center and the fuse panel under dash. This test is performed with a test light tool. The test light should illuminate on both sides of the fuse, if not the fuse has failed and needs to be replaced. If the fuses are ok a manufacturer specific repair procedure is required and an online auto repair manual is needed to continue. If the ignition system tests ok proceed to the next step.
poster.jpg?1292969781 Test Ignition System Video

Jan 12, 2011 | 1993 Dodge Caravan

3 Answers

The engine turnes but it wont start.


Free Auto Repair Advice by Professional Mechanics




Troubleshooting / Car Engine Cranks but Will Not Start / Engine Crank But Wont Start 2

* Why does my engine stall at idle?
* How do I change my spark plugs?
* Why does my engine stall?
* Why does the engine stall after replacing the battery?
* Why won't my engine crank over?
* How to retrieve trouble codes
* How to test fuel delivery system
* Engine cranks excessively
* Engine has excessive smoke
* Rapid ticking sounds when engine is cranked
* How to tune up your engine
* How to jump start your engine
* How to test an oxygen sensor
* How to open a car hood
* How a flywheel - flex plate works

Engine Cranks But Will Not Start

For an engine to run, you need three things to happen inside the engine, compression, fuel and ignition, without any one of these components the engine will not run. Follow the repair guide below:


Engine Configuration with Camshaft Operation

*

Compression - Engine compression caused by crankshaft rotation and pistons moving up and down inside the engine block. If the timing belt or timing chain fails it will cause the camshaft to become out of correlation with the crankshaft or allow the camshaft to stop rotating. Either of these conditions will cause the engine to lose compression and sometimes cause internal engine damage.
*

Fuel Delivery System - The fuel system includes: fuel pump, fuel injectors, pressure regulator, fuel filter and pressure lines. This system is used to supply fuel under pressure to the fuel injection system, the lack of fuel pressure or volume will cause the fuel delivery system to fail and the engine to stall or not start.
*

Ignition Spark Delivery System - The ignition system components include: spark plugs, spark plug wires, distributor (if applicable), crankshaft angle sensor, camshaft angle sensor, ignition coil, ignition module, knock sensor and PCM (engine control module). The engine relies on the ignition spark to be delivered to the combustion camber at the correct time. If the ignition spark stops or is delivered at the wrong time the engine will not run or run poorly.

If your engine cranks but does not start follow this troubleshooting guide:
* Step 1 - Anytime you have a problem with electronically controlled components such as an engine, transmission, ABS brake, or SRS (supplemental restraint system, Air Bag) inspect all fuses using a test light and check the under hood power distribution center and under dash fuse panels. If all fuses test ok continue to the next step.
* Step 2 - To check for problems with electronically controlled components such as an engine, transmission, ABS brake, or SRS (supplemental restraint system, Air Bag) and the fuses test ok a trouble code scan is needed to identify any system trouble. Use a simple scanner tool to retrieve trouble codes and see if they relate to the specific problem, like a crank angle sensor failure code. If the trouble code present does not pertain to the immediate problem like an EVAP code ignore it until a later time, after the car is running. The reason we repair non-related codes after the engine is running is because sometime false codes can be triggered by the engine not running. Once the engine is running again the code present might cycle and turn itself off. You might say "if the engine doesn't run shouldn't it have a trouble code?" Sometimes conditions occur that will not be detected by the computer, example: if the fuel pump fails the computer cannot detect the failure, so the engine doesn't start and the computer thinks everything is ok with no codes. If no trouble codes are present proceed to the next step.
* Step 3 - The spark plugs in your engine are used to ignite the compressed fuel air mixture. If the condition of the spark plugs are fouled by excessive fuel or carbon the engine will not start, backfire or run rough. Remove all spark plugs to inspect their condition. Please use this spark plug condition reference guide to see how the spark plugs are operating.
* Step 4 - Determine if the engine has compression, this can be done a number of ways but the most complete method is to perform a compression check. Remove the spark plugs and perform a compression test on one cylinder. If one cylinder has compression then the remaining cylinders usually will be close to the same. Crank the engine over about 5 seconds, normal compression readings should be between 125 psi and 160 psi on each cylinder. If no or little compression exists additional tests will be needed. The most common reason for an engine to lose compression is a timing belt or timing chain failure. If low or no compression exists remove the oil fill cap and observe camshaft rotation when the engine is cranked over. If no rotation exists the timing belt or chain has failed. If your engine has a timing belt and you cannot see the camshaft easily remove the upper bolts to the timing cover and gain visual access to the belt, recheck cam rotation by cranking the engine over. Sometimes a timing belt or chain can jump causing the camshaft to lose correlation with the crankshaft and therefore causing low compression. The best test for this condition is to remove the timing belt/chain cover and inspect timing marks. If the compression is ok proceed to next step.
* Step 5 - Test the ignition system output, ignition systems can vary in configuration but operate on the same principal. Ignition systems can consist of a coil, pick up coil, crank angle sensor, cam angle sensor, spark plugs, spark plug wires, distributor cap, ignition rotor and a distributor and any variations of these components. An ignition coil is a voltage stepper coil that transforms a low voltage (12 volts) signal into tens of thousands of volts needed to jump the gap of the spark plug. This coil is activated by an ignition module triggered by using the camshaft/crankshaft angle sensor; timing is adjusted by the ECM (computer).

Hope helps (remember rated and comment this).

Aug 11, 2010 | 1999 Chevrolet Blazer

2 Answers

Toyota ceilca 2000 gts will not start


try reseting the alarm,maybe all thats needed.....

May 01, 2010 | 2000 Toyota Celica

2 Answers

My 94 Toyota 4 Runner does not start.3 weeks ago it stopped working, would not start in the morning but would start later in the day. we took it to garage and they told us that Alternator and batt. are...


Make sure you have the timing right. Best way is to take #1 spark plug out, stick your finger in the spark plug hole, and turn th engine until it starts to blow your finger out. Now you're sure it's on compression stroke. Then, trun the engine by hand to get the timing mark set to zero. Now, take your distributor cap off, and make sure the rotor is pointing to #1 spark on your distributor cap. Where ever the rotor is pointing, is #1. Check rotor direction of rotation before you put the rest of the wires on.
You still may have to turn the distributor a bit once you have it close. When you start turning it over, turn the distributor slowly one direction and then the other until it starts.
If you have all that done right, check for spark, and fuel, and get back to me.

Nov 05, 2009 | 1994 Toyota 4Runner

2 Answers

Spark plug wires aren't corrextly attached to coil


153624Bring # 1 piston up on compression stroke and see where the rotor is ointing, That is the tower you put #1 on. then 53624 in the direction of rotor rotation. Put a piece of tissue in #1 plug hole and when it blows out, its on the compression stroke.

Oct 17, 2009 | 1992 Buick Century

3 Answers

Engine cranks but will not start


If Your Engine Cranks but Does Not Start Follow this Troubleshooting Guide
Vehicles operate by the same principle; basic troubleshooting procedure applies to most cars.
  • Step 1 - Anytime you have a problem with electronically controlled components such as an engine, transmission, ABS brake, or SRS(supplemental restraint system, Air Bag) inspect all fuses using a test light and check the under hood power distribution center and under dash fuse panels. If all fuses test ok continue to the next step.
  • Step 2 - To check for problems with electronically controlled components such as an engine, transmission, ABS brake, or SRS (supplemental restraint system, Air Bag) and the fuses test ok a trouble code scan is needed to identify any system trouble. Use a simple scanner tool to retrieve trouble codes and see if they relate to the specific problem, like a crank angle sensor failure code. If the trouble code present does not pertain to the immediate problem like an EVAP code ignore it until a later time, after the car is running. The reason we repair non-related codes after the engine is running is because sometime false codes can be triggered by the engine not running. Once the engine is running again the code present might cycle and turn itself off. You might say "if the engine doesn't run shouldn't it have a trouble code?" Sometimes conditions occur that will not be detected by the computer, example: if the fuel pump fails the computer cannot detect the failure, so the engine doesn't start and the computer thinks everything is ok with no codes. If no trouble codes are present proceed to the next step.
  • Step 3 - The spark plugs in your engine are used to ignite the compressed fuel air mixture. If the condition of the spark plugs are fouled by excessive fuel or carbon the engine will not start, backfire or run rough. Remove all spark plugs to inspect their condition. Please use this spark plug condition reference guide to see how the spark plugs are operating.
  • Step 4 - Determine if the engine has compression, this can be done a number of ways but the most complete method is to perform a compression check. Remove the spark plugs and perform a compression test on one cylinder. If one cylinder has compression then the remaining cylinders usually will be close to the same. Crank the engine over about 5 seconds, normal compression readings should be between 125 psi and 160 psi on each cylinder. If no or little compression exists additional tests will be needed. The most common reason for an engine to lose compression is a timing belt or timing chain failure. If low or no compression exists remove the oil fill cap and observe camshaft rotation when the engine is cranked over. If no rotation exists the timing belt or chain has failed. If your engine has a timing belt and you cannot see the camshaft easily remove the upper bolts to the timing cover and gain visual access to the belt, recheck cam rotation by cranking the engine over. Sometimes a timing belt or chain can jump causing the camshaft to lose correlation with the crankshaft and therefore causing low compression. The best test for this condition is to remove the timing belt/chain cover and inspect timing marks. If the compression is ok proceed to next step.
  • Step 5 - Test the ignition system output, ignition systems can vary in configuration but operate on the same principal. Ignition systems can consist of a coil, pick up coil, crank angle sensor, cam angle sensor, spark plugs, spark plug wires, distributor cap, ignition rotor and a distributor and any variations of these components. An ignition coil is a voltage stepper coil that transforms a low voltage (12 volts) signal into tens of thousands of volts needed to jump the gap of the spark plug. This coil is activated by an ignition module triggered by using the camshaft/crankshaft angle sensor; timing is adjusted by the ECM (computer).

Jul 19, 2009 | 2004 Nissan Altima

2 Answers

Engine rotates but will not start


Does the engine rotate at all when trying to start, or won't rotate at all? Clicking sound?
Blown fuse somewhere?
hope this works or clarify some more.

Jun 17, 2009 | 1991 Chevrolet Lumina

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

112 people viewed this question

Ask a Question

Usually answered in minutes!

Top Nissan Experts

yadayada
yadayada

Level 3 Expert

61292 Answers

Phil Lovisek
Phil Lovisek

Level 3 Expert

705 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Are you a Nissan Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...