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I have a civic 04 ex automatic the key don't come don't have spark and the injector not pulsing does the inmovilizer have something to do with this problem ?

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  • Cars & Trucks Expert
  • 230 Answers

Just went through similar issue with a 99 accord spark would be out because of the crank sensor but wouldn't kill injector pulse there is what is called a main relay honda used it controls both the injectors and fuel pump my car wasn't getting fuel pump power if you pull relay down should be next to brake pedal under dash and 7 wires and pull internals out and check circuit board for burnt solder or cracked solder when i wouldn't hear fuel pump i would take and apply light pressure to circuit board then fuel pump would kick in the injector side should be 6 volts and fuel pump should be 12 volts i would change crank sensor and get spark to return and then trouble shoot injectors also my car had after market remote start and keyless entry and was causing the key not to be recognized i removed alarm and got the coded key to read then had to trouble shoot the other problems after rectifying others first

Posted on Apr 23, 2015

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Posted on Jan 02, 2017

  • 1894 Answers

SOURCE: no injector pulse

hello sir,

absence of ground pulse means there is some kind of shorting circuit in your control circuit.

which can make the ground pulse to get shorted there itself preventing it to reach the circuit properly.

thank you

don't forget to rate the solution

good day

Posted on May 27, 2008

  • 158 Answers

SOURCE: 04 lancer no start,no spark or injector pulse.

it sound to me like the modual has fried it self in the distributor if it has you will have no spark or fuel pulse . have you checked the ignition fuses

Posted on Mar 24, 2009

Molson02536
  • 3854 Answers

SOURCE: 1985 corvette no pulse to injectors

Very important that if you are not savvy of working on your Vette ...you would be better off - taking your car to a dealership for repairs on your trouble codes. However if you feel that you want to, First locate your car's alcl this component is located just below the instrument panel and to the left of the center console. Remove the plastic cover the first two slots to your right are the A & B slots.
The A slot is the diagnostic slot and the B slot is the ground slot. Insert the computer key into these slots if you do not have a computer key, a paper clip or wire jumper clip will do, (with the engine off) this is very important...now only put the ignition key to on ( not start !!!) the check engine light will display a code 12 which is one flash followed by two flashes. This code will be flashed three times ..followed by the trouble code stored in your car's computer.

What ever the code is it will be flashed three times. Have a paper and pencil ready and write down the code.

Code #12: Normal No Codes. 
Code #13: Open Oxygen Sensor Circuit. 
Code #14: Coolant Sensor Circuit Low.
Code #15: Coolant Sensor Circuit High. 
Code #21: Throttle Position Sensor High. 
Code #22: Throttle Position Sensor Low. 
Code #23: Manifold Air Temperature Circuit High.
Code #24: Vehicle Speed Sensor. 
Code #25: Manifold Air Temperature Circuit Low. 
Code #32: EGR System Failure. 
Code #33: Mass Air Flow Sensor High.
Code #34: Mass Air Flow Sensor Low. 
Code #36: Mas Air Flow Sensor Burn-Off Function Fault. 
Code #41: Cylinder Select Error. 
Code #42: Electronic Spark Timing.
Code #43: Electronic Spark Control. 
Code #44: Lean Exhaust indication. 
Code #45: Rich Exhaust Indication. 
Code #46: Vehicle Anti Theft Fault. 
Code #51: Faulty Mem-Cal. 
Code #52: Fuel Calpak Missing.
Code #52(1990-91 Corvette Only): Engine Oil Temperature Sensor Low. 
Code #53: System Over Voltage. 
Code #54: Fuel Pump Circuit Low Voltage. 
Code #55: Defective ECM. 
Code #62: Engine Oil Temperature Sensor Circuit High.

Please remember that if you have the computer key installed in the alcl and you start the engine (you will ruin the engine's computer) only put the ignition to on (not to start).

If you should get a check engine soon display.. you can use the above procedure and codes to buy the right part or at the very least to keep from getting taken for a ride and be made to pay hight prices for some inexpensive module that you could have installed yourself.

If your engine displays a trouble code ... your engine will go into limp mode ..it will still run but very poorly. You might be able to reset the computer if it will not start (just to get home) by disconnecting both battery cables and re-installing them ...this is not recommended ..but if you are stranded it might help unitl you get your car home or to a repair shop..good luck.

Good luck and hope this helps. 

Posted on May 08, 2009

  • 784 Answers

SOURCE: I have no spark.. have replaced crank sensor,

The coil is good after you check resistance from primary and secondary terminals, but it won't generate spark if there is not pulsing at the primary terminals. You can generate sparks by connecting at the primary coil to 12 volts from the battery. Connect the secondary terminal to a spark plug. Now the primary connection has to make pulses on off continuously (either positive or negative ) to generate the spark from the secondary terminal (now is at the spark plug). If you have spark here then the problem is the ignition module. It is a electronic device to perform the function as you just did to generate the spark. Good luck.

Posted on Nov 10, 2009

  • 7 Answers

SOURCE: crank but no start,no spark, has no pulse to

check crank sensor rear of engine.

Posted on Jan 16, 2010

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