Question about 1998 Hyundai Elantra

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1998 Elantra not starting / No spark to from plugs

No spark to plugs Fuel pump works and pressure is high Cam position sensor changed. original had burn mark. No signal to coil pack. Not sure if crank position sensor is working. Auto computer taken from vehicle and tested in another elantra. Computer starts test vehicle. Test vehicle revs out clean and drives without issue. Not sure if info provides sufficient base to suggest possible way forward but would greatly appreciate any and all assistance.

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  • roger barnes Feb 29, 2012

    they are known for crank sensers provided you did all the diagnostic checks first

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6 Suggested Answers

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Posted on Jan 02, 2017

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SOURCE: hyundai accent 2001 no spark at start but once started runs fine!

I had this problem on my 2001 accent too. It turned out to be the front O2 sensor. Try disconnecting that by the exhaust manifold. If it starts right up that's your problem

Posted on Dec 17, 2008

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SOURCE: how to aline timing marks

what are the timing marks for a hyundia elantra

Posted on Jan 19, 2009

michigan man
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SOURCE: oil change procedure on a 2005 Hyundai elantra

it is very easy to change the oil put the car on ramps secure the back end look for the drain plug underneath the engine make sure you have the right size wrench and when you remove the plug also check the gasket on the plug to make sure it is not cracked you will also need an oil filter wrench and my other suggestion to you is to go to autozone to see if they have a Haynes repair manual for your car and if they don't see if they can order you one in the mean time they can also print you off a diagram of how to change the oil in you car safely

Posted on Jan 20, 2009

  • 1 Answer

SOURCE: DLC communications with OBD not possible

OBD II connector troubleshooting 101

I had the same problem with my 2000 Elantra. the OBD II connector pins get squished and won't make cantact with the scan tool, therefore no connection. the solution is to bend the pins back so they will connect to the scan tool.


FIRST! check your lighter and radio fuses (which you have already done). If possible, make sure your scan tool is working properly, try it on another car. If it is functioning properly, remove the 2 screws holding the obd II connector to the dash. Look for obvious signs of corrosion, damage, or stuff that shouln't be in the connector (rocks, gum, etc.) clean the connector with a good electronics cleaner (I use the CRC stuff), you can usually find it at you local parts store, radio shack, or even wal mart. hose down the inside of the connector thouroughly and allow time to dry.

check for voltage between 4 (gnd) & 16 (+vcc) then 5(gnd) and 16(+vcc) with the ignition on the voltage should be between 12v-16v (these pins may be different on other cars, look for an OBD II connector pinout diagram if your car is different). If this voltage is not present at either pin, the problem is not the connector. check your fuses and wiring. if this voltage is present at both pins continue.

Here's what I did. with the connector free from the dash, you can see the back of the connector where the wires enter the connector. on either side of the connector there may be a white clip. pop both of them off. you should be able to push a small screwdriver or pick in that space to pull the pins back out towards the outside of the connector. do one at a time so you can tell if the pin has moved back out into position. do this for all of the pins. Try to connect. if still no luck try again to push out the pins and reconnect.

If your connection is restored, replace the clips, screw it back into the dash. Return your car to the lousy DMV where they will proceed to tell you something else is wrong which they neglected to tell you on your first 10 visits!! :-)

Stuff thats good to know:
some auto parts stores will connect their OBD II scan tool to you car for free. auto zone is one place
some times the computer will need to reset to restore a connection to the scan tool. to do this simply cycle the ignition off (wait a few seconds) then on again.
online auction places are a excellent resource for USB to OBD II connectors to connect your laptop to your car. there is lots of OBD II diagnostic freeware out there to go with your newly purchased connector.

Good Luck

Chris
-CL Systems

Posted on Feb 06, 2009

  • 16 Answers

SOURCE: 2002 Hyundai Elantra not starting

check fuel pump

Posted on Mar 14, 2009

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Sudden no starts are usually gas or ignition related. That's why the mantra check for spark and check for gas. If you check for spark at a spark plug and have a blue snapping spark, the ignition is probably good. To check for gas, best to check fuel pressure, as high fuel pressure against the injectors ensures that proper amount of gas will be sprayed out by the injectors. Do you hear the fuel pump buzz on for a couple of seconds when the key is turned to on? If not, try banging on the bottom of the gas tank to see if pump will work. If it does, you will need to replace the pump-may work a couple more times by tapping on the tank, but the pump is basically gone.
If gas and spark is present, one would next need to check the injector circuit.
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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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Aug 06, 2010 | 1998 Hyundai Elantra

1 Answer

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Check the spark, remove the fuse to the fuel pump and remove one of the spark plugs. Connect the plug to its lead and position it well away from the engine against the truck frame (do not hold it) and turn the engine over, check the spark. If no spark it most probably a faulty coil. Check the impedance of the spark plug leads and replace any that are much higher than the rest. My guess is that you have spark but no fuel, What?... OK this is what I think is wrong. Your pump is fine when at position 2 on the ignition switch however when you switch to position three to fire the engine the power to the fuel pump is momentarily disconnected. A leaking fuel pressure regulator or injector would drop the pressure in the fuel line and at the same time flood the engine making it impossible to start. Once you start the engine with ether the ignition is back to position 2 and the pump can make good any loss in pressure but because the intake mix is rich this will cause the engine to run rich too. A good fuel system is capable of delivering 40 - 50PSI of fuel pressure and when switched off up to 90% of this pressure should be maintained for about 5 minutes, if it cannot check out the fuel pressure regulator and injectors. The fuel pipe should be capable of filling a pint pot in about 15 seconds, if it cannot check out the fuel filter is clogged.
Hope the above gives you some pointers

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