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Fuel & spark but won't start

Will you still have spark at the plugs with a bad crankshaft sensor?

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You can on and off but mostly no

Posted on Jan 04, 2009

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97 oldsmobile achieva wont fire changed coil pack spark plugs cam sensor still wont start


Make sure battery has a full charge and battery connections all good.
If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse.
If you having a problem with more than one system, I want to check for rpm signal, that usually comes from the crank sensor. Not sure why you replaced cam sensor? I always want to check sensor wiring circuits before replacing anything. Don't replace anything unless your testing points in that direction.

Nov 04, 2016 | Oldsmobile Cars & Trucks

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Have changed to crankshaft sensor the oxygen sensor spark plugs and wire and wont start even when it is turning over


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.

Mar 14, 2013 | 2000 Pontiac Sunfire

1 Answer

I have a 94 chrysler concorde. The problem is it won't start, I have replaced the fuel pump and the fuel pump relay fuse. And it still won't start. What should I do now?


check see if you getting spark if not.have vechicle code scan could have faulty ECM .faulty camshaft sensor and crankshaft sensor.make sure engine has been tuned up.replace fuel filter change spark plugs and wires. before engine can run need fuel and spark.either one not working car will not crank.

Jan 12, 2013 | Cars & Trucks

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I have replaced the camshaft sensor, Crankshaft sencor, computer, crankshaft pully, and new spark plugs on my 1999 Mitsubishi Eclipse and it still won't start, what could it be?


Engine needs spark, fuel and air to run. I assume the starter is turning the engine over. Have you verified you have spark at the plugs? Have you verified you have fuel pressure? Can you hear the fuel pump when you first turn the ignition key? If, yes to those, check the timing belt settings to make sure something hasn't caused the timing to change.

Mar 22, 2012 | 1999 Mitsubishi Eclipse

1 Answer

It won't start


You need to find out if you have fuel pressure to the fuel injectors, and if not you may have a bad fuel pump. If you do have fuel pressure, then check if the spark plugs are firing. If they are not there could be a bad sensor, like a crankshaft position sensor.

Dec 31, 2011 | 1999 Acura SLX

1 Answer

The vehical turns over but it won't start


You need to find out which is missing...spark, fuel, or BOTH. If there is no spark on any of the cylinders, a common cause is a bad crankshaft position sensor. It could also be a bad ignition module. If there is spark, then You need to diagnose your fuel delivery and fuel injection systems to find out what the problem is.

Aug 06, 2011 | 1999 Jeep Cherokee

1 Answer

Dear Fixya, My 1993 excel hyundai turns over but won't start, we put plugs and wires and new fuel gasket. we r wondering where the fuel pump is, is there one or two pumps and how to get to them to fix...


Have you checked for spark first? Sometimes a car won't start due to no spark. This condition is usually caused by: Security system, bad ignition module, crankshaft sensor, camshaft sensor. You check it by pulling a plug wire and putting a screwdriver in the wire to see if it arcs. If it is getting fire look for the fuel pressure release valve usually located on the fuel rail, looks like a tire valve stem. If it shoots out gas, and you hear the fuel pump prime, check the fuel pressure regulator. It could also be the timing. There are four things needed for a car to start: fuel, spark, timing, compression. As for your question, as far as I know there is one fuel pump, you have to drop the tank to fix it. Hope this helps.

Jun 10, 2011 | 1994 Hyundai Excel

1 Answer

The engine will turn over but won"t start


Check for spark and gas.

If you spray starting fluid into the intake and it starts for a few seconds it could be a fuel pump or circuit that is bad, assuming there is gas in the tank.

If it doesn't start, then there is likely an ignition problem.
Test the spark from the spark plug wires to make sure.

If the ignition system doesn't have spark, check to see if the crankshaft position sensor is faulty.

Good luck on this repair.

Oct 17, 2010 | 2001 Pontiac Grand Am SE

1 Answer

1998 elantra was running fine and motor just died. Will turn over fine but will not start. I had filled up with fuel and driven about 50 miles when this happened.


Is the engine getting fuel and spark?

Try to put a few teaspoons of gas in the throttle body to see if it starts up. If it doesn't then the engine's spark plugs may not getting spark.

A possible coil may be the root of the above problem.

If it does start and run for a few seconds then the spark is good, but the fuel pump may not be pressurizing (bad fuel pump) or the fuel injectors are not firing (possible PCM or Powertrain Control Module).

A crankshaft position sensor can also cause a no start condition.
It is located near the Crankshaft of the engine.

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Here's more information about the crankshaft position sensor which if bad, can cause a no start or no run condition.
Crankshaft Position Sensor Engine speed is a very important input to the Engine Management System (EMS). Crankshaft speed and position are the basis for many calculations made by the computer. Crankshaft position values are transmitted to the computer by pickup coils also known as Permanent Magnet (P/M) generators, hall-effect sensors or optical sensors. The Crankshaft Position Sensor (CKP) also known as engine speed sensor is located in close proximity to the crankshaft.
In addition, the EMS uses minute variations in the CKP sensor data to determine engine misfire. The EMS uses this information in conjunction with the camshaft position sensor to perform misfire diagnostics.
Related Symptoms No Start / Intermittent Start Condition – Can be caused by a faulty crankshaft position sensor due to loose connections, bad grounds, high resistance in the circuit, or opens in the circuit. (See also Engine Mechanical)
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These are just a few possibilities, and if one takes it to the dealer to have the engine diagnosed, that might be a good place to continue of the above doesn't isolate the problem sufficiently for repair of the no start condition.

Aug 06, 2010 | 1998 Hyundai Elantra

1 Answer

Cranks but won't start put in new


It may be the crankshaft sensor.Some cars use sensors that "watch" the crankshaft.When you turn over the car the sensor sees the crankshaft moving and tells the computer to send fuel,spark,etc. I am not real keen on your particular car but it sounds like this may be your problem.

Jan 29, 2010 | 1991 Plymouth Laser

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