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Car wont start changed the crankshaft sensor fuel pump and it does turn over but doesnt start up.and there is spark comming from coils also

Changed crankshaft sensor new,checked fuel pump good,check for sparks good it ha gas also,engine light does come on wen the key is turned and lights work door locks work everything works but just wont start.was driving on freeway wen car just turned off and started back up made it home next day it started up warmed it up and it turned off again didnt start for a while tried 30 mints later and it started but shutt off and now nothing just turns over but wont start up

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  • Cars & Trucks Master
  • 2,101 Answers

What is the make and model have you check the fuel pressure regulator

Posted on Jan 04, 2013

  • 2 more comments 
  • lloyd Jan 04, 2013

    95 oldmobile 88 supercharger and no i havent checked it but i took out all the gas from the top nozzle and it throws it out with good pressure done this over and over and it does pump the gas up but nothing

  • lloyd Jan 04, 2013

    i do remember wen i would drive it on the freeway and i would press the the gas pedale to get speed up hills it would not get that good speed it would rock back and forth

  • lloyd Jan 04, 2013

    i checked all relays and fuses also

  • teds repairs
    teds repairs Jan 04, 2013

    have you tried to spray starter fluid in the throttle body.if it starts then it is afuel problem . if it does not start then the spark is not at the spark plugs

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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justuscc
  • 360 Answers

SOURCE: car will just turn over

main relay contacts get burned up...... common on the hondas its under the drivers side dash

Posted on Oct 10, 2008

  • 1 Answer

SOURCE: Engine died while driving, cranks but won't start.

not all scanners a created equal. You need to check for trouble codes...............but it must be fixec by now.

Posted on Feb 08, 2009

Davaith
  • 56 Answers

SOURCE: 2000 chevy venture doesnt start

Not the IAC, or MAF, or 02

Does the Van Crank over?
Have you checked the IGN Relays? 1,2,and 3?
How did the Battery test out?
Anything below 11.9v battery is dead.
So I suggest that you do not throw any more parts and check the battery again.

Posted on Jul 15, 2009

blueextc3221
  • 15935 Answers

SOURCE: 2001 Chevy Malibu, 89,000 miles, 3.1 engine, won't start

CLICK HERE for the injector schematic.
CLICK HERE for the Ignition schematic.

Since the PCM uses info gatheres from the crank and cam sensors to calculate ignition - and there are no OBD codes - in all likelihood, the PCM itself is bad.

The Ignition Module, also transmits to the PCM.

It appears after all your testing - that the PCM is at fault.

It does not error report on itself (unfortunately).

The ignition timing is controlled by the Powertrain Control Module (PCM). No adjustment is necessary (distributorless ignition) or possible.

Please see the following....

The ignition timing is controlled by the Powertrain Control Module (PCM). No adjustment is necessary or possible.
The engines covered by this manual are equipped with distributorless ignitions, ignition timing is controlled by the Powertrain Control Module (PCM), as applicable. No adjustments are possible. If ignition timing is not within specification, there is a fault in the engine control system. Diagnose and repair the problem as necessary.
Ignition timing is the measurement, in degrees of crankshaft rotation, of the point at which the spark plugs fire in each of the cylinders. It is measured in degrees before or after Top Dead Center (TDC) of the compression stroke.
Ideally, the air/fuel mixture in the cylinder will be ignited by the spark plug just as the piston passes TDC of the compression stroke. If this happens, the piston will be at the beginning of the power stroke just as the compressed and ignited air/fuel mixture forces the piston down and turns the crankshaft. Because it takes a fraction of a second for the spark plug to ignite the mixture in the cylinder, the spark plug must fire a little before the piston reaches TDC. Otherwise, the mixture will not be completely ignited as the piston passes TDC and the full power of the explosion will not be used by the engine.
The timing measurement is given in degrees of crankshaft rotation before the piston reaches TDC (BTDC). If the setting for the ignition timing is 10 BTDC, each spark plug must fire 10 degrees before each piston reaches TDC. This only holds true, however, when the engine is at idle speed. The combustion process must be complete by 23° ATDC to maintain proper engine performance, fuel mileage, and low emissions.
As the engine speed increases, the pistons go faster. The spark plugs have to ignite the fuel even sooner if it is to be completely ignited when the piston reaches TDC. Spark timing changes are accomplished electronically by the engine and ignition control computers.
If the ignition is set too far advanced (BTDC), the ignition and expansion of the fuel in the cylinder will occur too soon and tend to force the piston down while it is still traveling up. This causes pre ignition or -knocking and pinging-. If the ignition spark is set too far retarded, or after TDC (ATDC), the piston will have already started on its way down when the fuel is ignited. The piston will be forced down for only a portion of its travel, resulting in poor engine performance and lack of power.
Timing marks or scales can be found on the rim of the crankshaft pulley and the timing cover. The marks on the pulley correspond to the position of the piston in the No. 1 cylinder. A stroboscopic (dynamic) timing light is hooked onto the No. 1 cylinder spark plug wire (2.2L engine only, on the 2.4L engines, special adapters are needed) . Every time the spark plug fires, the timing light flashes. By aiming the light at the timing marks while the engine is running, the exact position of the piston within the cylinder can be easily read (the flash of light makes the mark on the pulley appear to be standing still). Proper timing is indicated when the mark and scale are in specified alignment.


WARNING When checking timing with the engine running, take care not to get the timing light wires tangled in the fan blades and/or drive belts.

The engines covered by this manual are equipped with distributorless ignitions, ignition timing is controlled by the Powertrain Control Module (PCM), as applicable. No adjustments are possible. If ignition timing is not within specification, there is a fault in the engine control system. Diagnose and repair the problem as necessary.




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Posted on Aug 18, 2009

  • 55 Answers

SOURCE: 2005 hyndia accent check engine light came on,1

Check that the timing has not jumped, incorrect timing will trigger a cam sensor code as the ecu can not work out the correct position of the cam.

John

Posted on Dec 02, 2010

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1 Answer

3.3 96 gran voyager not getting fuel or spark


try changing the crankshaft position sensor but first for the fuel turn the key and listen for the fuel pump to kick on if it does and it still wont start find the gas line to the fuel regulator and pull it off and have someone crank it if it has a good pump it will have good pressure and as for the spark if its not getting spark im guessing it has one coil pack together its computerized so it could of gone out but anyway check the fuel stuff first and then change the crankshaft position sensor im almost competly sure that will fix your problem

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do you hear fuel pump operation if yes replace fuel filter.if you dont hear fuel pump running could have open short in fuel pump harness or could have faulty fuel pump relay faulty automatic shut down relay,fuse or PCM.if fuel system okay check for spark at spark plugs no spark could have faulty ignition coil,camshaft sensor or crankshaft position sensor.

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Borrow a fuel pressure tester from Auto Zone and test the fuel system. It could be that you have a bad fuel pump or fuel pressure regulator. It also could be a plugged fuel filter.

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Changed fuel pump but it wont start


Check for spark, if spark then spray start fluid into throttle body, if it starts check your fuel injectors with a noid light also check crankshaft position sensor. If the pump wont pump check the fuse and connection to the fuel pump for voltage.

Apr 01, 2012 | 1995 Dodge Intrepid

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Replaced bad fuel pump, installed new relay and fuel filter, engine turns over but is not firing on..... positive the fuel pump is pumping gas and checked to see if gas was going thru fuel filter. Tried...


Hi, Ok you have confirmed that it's not a fuel problem. You need to check for spark. Pull the coil wire off of the coil(secondary lead-looks like a spark plug wire) Have some one crank it over and listen for a popping sound. IF yes, spark is at the coil, that means all ignition sensors are working. Next check for spark at ends of wires after cap. IF no replace cap and rotor. IF yes remove a couple spark plugs and check for fouling(wet, fuel etc...) IF yes replace or clean plugs and retest for starting. IF no spark is present at coil you need to scan computer and watch for rpm signal. IF no rpm signal, replace crankshaft sensor with OEM delco part. BIGGEST problem with these engines is Cap and Rotor burn out.

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check the color of your spark if it is blue your good if orange replace coil dependig on your setup and if you have 1 coild or 8 coils you many have to check each cylinder seperate just pull out spark plug replace the spark plug wire have someone try to start car and lood at color of spark i should note dont hold the wire just let it rest close by

if that is ok replace your crankshaft postion sensor as it tells the cars ecu when and to what cylinder to fire spark to faulty crankshaft postion sensors 99 percent of the time wont allow car to start or very hard starts the other 1 percent

if it helps please leave good review 4 thumbs

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could be a bad crankshaft position sensor or a bad camshaft position sensor. Either would cause no spark. I would check to see that you have fuel coming up to the throttle body

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