Question about Acura Legend

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Car cranks get fuel psi but does not start. How to check Ingition control module. Changed main relay already.

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  • racerx203 Sep 10, 2010

    Yes getting sprak,shouldn't the car flood if i press gas pledel when cranking, is not

  • racerx203 Sep 10, 2010

    1991 acura legend L crankes but won't start. Changed main relay,gas filter. The gas pump turns on when cranking,I do get spark but no fuel. I hold the pedel down still nothing and i check sprak plugs there is no gas on them would'nt you think they should be flooded?

  • racerx203 Sep 10, 2010

    The car has spark there is no distributor, coils. The injectors are not coming on what would cause this to happen. I changed relay already, pump turnes on, would low fuel psi do this and if so what should the psi be.

  • racerx203 Sep 11, 2010

    Do i disconnect injector then crank, how many times will it click, every revelution. So if it does not click most likely will be ignitor or fuel pump with low psi ,can't find a psi tester for fuel.

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Did you check for spark at your spark plugs? if is there no sparks, check the crank sensor.

Posted on Sep 10, 2010

  • Ruben Diaz Sep 10, 2010

    did you check for spark at your spark plugs? if is there no sparks, check the crank sensor. follow spark cables, if your car have a distributor chrck the cap and rotor, etc. dont assum that your module is bad, or your going to spend lots of money guessing, it could be something simple a electri wire for example. bye

  • Ruben Diaz Sep 10, 2010

    ok racer is got to be your gas pump! did you tried differnt relay? i think you did. well try to find the gas pump conector disconnected and check for continuity there will be 3 or for wires 2 or i positive and 2 negative cables one is for the pump itself and the other for the sending unit. you want to makesure is the gas pump. if there is no continuity on gas pump wire you know what that means but go for the pump, and good luck.

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The Ignition Control Module (ICM) is a common part to fail. When they get old they get heat sensitive. That is to say when they get hot, they stop working. Then when they cool off, they will start working again. By the time you give up getting it started and get it towed to the shop, the technician will go out and it will start right up for him.

This would apply to the Main EFI Relay located under the dash, near the brake pedal. But the Main Relay usually craps out when the car has been parked in the sun for a while and the interior of the car heats up. In this case opening the door and letting it cool off gets it working for a while.

Car cranks get fuel psi - b817217.gif

However, when ignition coils go bad, they stay bad. The Crankshaft Position Sensor (CKP), Camshaft Position Sensor (CYP) and Top Dead Center (TDC) are prone to going bad as well.

Junk yard is a good place to start looking replacement parts, but dealership is your last choice. Also, can try here: prestigeacura.com/parts

Also, its possible that you are interesting in this info: Acura-Integra-1998-2001 - Service-and-Repair-Manual

Hope helps.

Posted on Sep 10, 2010

  • ZJ Limited
    ZJ Limited Sep 10, 2010

    1) The fuel pump; or...
    2) The Main Relay Assembly under the steering wheel

    Keep in mind that you will need reset the computer; the PCM reset (fuse or Battery disconnet) cancels the PCM Memory for idle control. The following procedure is needed to reset:

    1 - Start engine. Hold RPM at 3k with no load (P or N) until radiator fan comes on.

    2- Let engine idle for 5mins in Park (P) or Neutral (N)


    With A/C off, headlights off and rear defog off.

    Engine cranks but won't start, these might be your issues:

    - Main relay
    - Igniter
    - Engine grounds
    - Injectors
    - Timing belt
    - Fuel pump/filter
    - Air filter
    - Cam/Crank Position sensor
    - Ignition switch

    Check here for one complete test Legend-crank-but-does-not-start-heres-diy-diagnostic-procedure

    Also, Here is another link on how to troubleshoot the ignition: techautorepairs.com/ignition

    Keep us updated.

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Fuel Pump Electrical Circuit
OPERATION
When the key is turned ON with out the engine running, the control module turns a fuel pump relay ON for two seconds. This builds up fuel pressure quickly. If the engine is not started within two seconds, the control module shuts the fuel pump OFF and waits until the engine starts. As soon as the engine is cranked, the control module turns the relay ON and runs the fuel pump.
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