Question about Hyundai Motor 2002 Elantra

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2002 Hyundai Elantra not starting

Cranks but won't fire at all. No spark, no injector pulse, fuel pump isn't getting a signal. All fuses ok, Crank and cam sensor are getting 5V. My diagnostic tool cannot communcate with the ECU. How could I make sure it is an ECU fault?

Posted by Anonymous on

  • avbas33 May 03, 2009

    2000 hyundai elantra - my car wont start... the engine cranks and there is a spark (i believe) - i checked the fuses and none are melted....

    when i turn the key i dont hear the sounds you normally hear from the fuel pump which leads me to believe that its the fuel pump but i am not sure

    i had used fuel starting spray a couple of times and it had worked but it no longer works anymore.... so im all out of ideas and i really dont want to have to replace the fuel pump - i was wondering if anyone knew what might be the issue and if they had done anything to resolve this problem.....

    thank you


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  • 16 Answers

Check fuel pump

Posted on Mar 14, 2009

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What would be wrong when my car has gas, but no spark?


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Feul pump is good . fuse good . still wont fire


What is year--make--model? 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. Also, check for fuel injector pulse.


Can you check for applicable trouble codes?

May 12, 2015 | Cars & Trucks

1 Answer

1999 volkswagon jetta v6 cranks but wont start


I'm having a similar issue with my '97 Golf K2 with a 2.0 I checked the resistance to the crank sensor and it was almost 900ohms with the replacement one being 500 ohms. Changed it, didn't work.


Mine was running fine driving 70MPH on the highway and just shut off. Now it cranks, fuel pump runs and it seems to be getting fuel but still no spark. I have a coil/module on order and will try it tomorrow.


UPDATE

Replaced the coil. Coil sparks once when you first turn the key on, that's it. crank sensor has already been replaced yesterday.
Injectors seem to fire (I smell fuel if I crank it a while) but still no spark.
I have 12V to the coil and 12V when cranking.

I see tons of posts with this issue but no resolutions. Come on somebody has to have been here before....

UPDATE #2

I do NOT have an injector pulse or a pulsed signal to the coil. When I crank the car the oil pressure light blinks on and off (just noticed this not sure if it is relevant)

I do get a check engine light when I turn the key on and when cranking, thought this meant ECU was good?

Any other way to test the ECU?

Could the pick up in the distributor be bad? Doesn't the pick up signal the ECU to fire the coil and injectors, I thought the crank sensor was just a TDC reference point?

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2 Answers

Car cranks but doesn't start


Take the car in and have the fuel injector computer tested. If you're hearing the crank, you're getting good spark, but the fuel/air mix is off. Ensure your air filter is clean, and have that computer checked, all it takes is a little bit of bit-wander to make your fuel-air mix go completely haywire.

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2002 hyundai elantra cranks but doesn't start cleaned battery terminals checked fuses n relays fuel pump coils all function ok timeing belt also looks great car only has 80000 miles what I noticed is no...


You said you checked the fuses,relays and coils and they were okey. Then you said no power to coils or fuel pump. What tests where performed and how?

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1998 Lincoln Town Car cranks but does not start. Fuel pump, cam sensor, crank sensor, fuel pump relay, fuses and breakers are OK. No fuel to the injectors. What about ignition or computer


possible just not probable. you need to see if there is any pressure to fuel rail. if not youre going to have to by pass the fuel pump and see if it is getting voltage. if so then apply a seperate voltage and ground wire to the pump to see if it kicks on. come to think of it, it could be the PATS system(security) that shuts down the system. it will crank but will not fire. your ford dealer will need to reprogram the system.

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1 Answer

Crank no start: has no spark and only has injector pulse on cyl # 1. if you spray starting fluid directly into throttle body car starts and stays running and has spark and inj. pulse. once you turn the car...


Fuel pump, you have to have press in the rail to fire all injectors- she will run on ether but not good for her. Ck your pump and any related fuses,relays,wiring.

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2 Answers

Cranks but wont start


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.
Basic Checks:

A. Test Fuses. Test both under hood power distribution center and the fuse panel under dash. This is done 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.
B. Testing Fuel Pressure Test for proper fuel pressure with a test gauge on the fuel rail, most throttle body injection cars (TBI) are between 13 psi and 17 psi. and most (DPI) direct port inject systems are between 40 psi and 55 psi. If no or little fuel pressure is observed and there is 12 volt power present the fuel pump, the fuel pump needs replacing.
C. Checking Timing Belt Test for compression by removing a spark plug and insert a compression gauge. Crank the engine over about 5 seconds the gauge should read between 125 psi and 165 psi, if no compression is observed remove front engine cover to inspect timing belt or chain. Crank engine to observe cam rotation, if the cam does not rotate the timing belt or chain has failed. (note: if the timing belt drives the water pump it is best to replace the water pump at this time)
D. Test for Injector Pulse Remove injector connector to insert injector test light (node) or volt meter. Observe light flash or gauge pulse while cranking. If light/voltmeter doesn't respond, an ignition distributor/crank angle sensor (CKS) or an ignition module is most likely your problem.
E. Test for Ignition Spark Remove spark plug wire, insert an extra spark plug into end of wire, rest spark plug next to a ground source then crank engine. You should observe a blue spark between the spark plug gap and ground source. If no spark is observed, an ignition coil, ignition rotor or spark plug wires might have failed. (always keep hands away from engine when cranking)

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