Question about 2002 Hyundai Accent

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I have a 2004 hyundai accent. It is getting no pulse to the injecters. I have tried grounds, crank sensor ,cam senor. If you have any ideas let me no. Thanks

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  • Martin
    Martin Mar 24, 2011

    You say no there a live and no switched earth, or a switched earth and no live?



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Computer or ignition module at fault

Posted on Mar 24, 2011


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My almera 1.6 2004 model coils not recieving power.

ok, i will try and help you as much as i can. first you should be getting 12 volts a pulse and a ground( negative ). if you're getting the 12 volts and the grounds but no pulse the the car has 2 sensors, one is the cam and the other is the crank. those sensors provide pulse to one for the injectors and the crank is for the coil packs. you can test for pulse by using a noid light or the normal test light. just connect the test light to 12 volts terminal and have someone crank over the engine. if you don't get a low flickering light then you neeed to change the sensor

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You describe an electrical issue. First of all, how do you know the injector pulse is 'erratic'?
Is the ignition spark ALSO erratic? If so, how so? I need specifics, details regarding your description of 'erratic'. I can assume/presume you have experience/education/training in automotive diagnostics... ??

In my electrical/eagelectronics experience, you definitely have an electrical/electrodynamic problem/issue.

Tell me what you've done, diagnostically, to determine (isolate) the 'CAUSE' of this erratic injector pulse. What have you inspected/checked? What have you NOT inspected/checked?

Get back to me, then we can go from there.

However, first thoughts
The engine management computer (ECM/ECU/PCM) can cause/create the symptom you describe
The engine wiring harness also (chafed wires, bad ground circuits, etc.)
Malfunctioning senors (Crank Position Sensor (CKP), Cam Position Sensor (CPS),
Low Voltage Condition, etc.

Feb 08, 2011 | Hyundai Tiburon Cars & Trucks

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Put timming chain and cam and crank sensors still no injecter pulse

Check that there is voltage at the cam and crank sensors, particularly the crank sensor. And, maybe swap out a computer ito see if that rectifies the problem, since the computer controls the injector pulse assuming it gets a signal through the wiring to the crank sensor.

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so you have no drivers for the injectors.... every thing is connected, no shorts..... the main thing that comes to mind is the computer....

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dear friend-i get the idea that your crank angle sensor is faulty ,best thing to do is take your vehicle for a diagnotic test befor changing anything.

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You can access the connector from underneath the car by removing the black plastic engine splash shield and looking in under the battery box. The shield is held by a few 10mm bolts and pushpins.

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make sure crank sensor is all the way seated care taken 10mmnut dont over tighten or you will break sensor

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