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Hello to all,
This is my first post. History time: several weeks ago the motor (LQ9) would not turn over while using the key. We, my neighbor and I, just got the standard clicking, symptom of a starter solenoid gone bad. Battery had a good charge but we tried boosting it with no different results. BTW the boat (2003) only has 40 hours total on it. Its pretty sweet. So the starter Solenoid was replaced and now the motor turns over just like its suppose to but...... no ignition. We had ignition before the starter /solenoid problem.
Heres what I do know:
1. when the key is turned on the fuel pump spins up and pressurizes the fuel system. The shrader valve on the fuel rail has pressure, I did not use a gauge, just a rag to keep the fuel from spraying too far.
2. The dash gauges power up and the check engine light comes on. The cel turns off during start attempts.
3. The 3 relays at the back of the motor(fuel pump, ignition,and ecm) all click when the key is turned on.
4. If we attempt to start we get no ignition but we do smell fuel , not a leak, just from turning key off and on during several start attempts. Just confirms that fuel is present, but not the psi.
5. If we remove the kill safety lanyard the fuel pump does not pressurize when the key is turned on. I'm assuming the kill switch is fuctioning properly.
6. The 3 fuses down near the big red engine breaker visually apear to be good.
7. The big red engine circuit breaker is firm with no play. It sticks out about 1/4 inch and does not appear to be popped. According to other post one would definitely know if it was popped visually.
8. All breakers under the dash are in.
I have not had a chance to test the relays, but my other neighbor has an 02 prostar, different engine but same cadillac northstar ignition system, and I may swap a relay if they have the same part number.
I have not tested to see if the plugs spark during start. I'll do that today time permitting. My gut feeling is no spark signal is getting to the system. Is there a crank shaft or speed/rotation sensor on the motor that signals the fuel system or ignition and if so where is it located?
I guess I also need to check the grounds on the fuel pump and the motor.
I've looked for inline fuses (info from other threads) from the ignition switch under the dash but did not see them.
I dont know if the injectors are functioning
Does anyone have a wiring diagram they can send me.
Can anyone recommend a good service manual for this boat, a book that walks you thru the diagnostic steps needed to narrow down the cause of this problem.
I'm hopng its not the ECM but is there a DIY test for this? Hopefully the ecm didnt get fried when we tried to jumpstart the boat.
The nearest dealer is 60 plus mile away in Richmond VA. I'm not ready to throw in the towel yet.
But I need a good diagnostic resorce or some help from my MC friends/family.
I spent most of yesterday trying to analyse the problem and I caught my wifes cold, didnt sleep well so I may not get to far today. Summer colds suck..
I do plan to go back and check the wiring/connections at the starter and batterry terminals. Those are the 2 things that changed since the motor was last running. Correct me if I'm wrong here but there isnt a wire at the starter that has anything to do with ignition spark is there? Thanks
This is my first post. History time: several weeks ago the motor (LQ9) would not turn over while using the key. We, my neighbor and I, just got the standard clicking, symptom of a starter solenoid gone bad. Battery had a good charge but we tried boosting it with no different results. BTW the boat (2003) only has 40 hours total on it. Its pretty sweet. So the starter Solenoid was replaced and now the motor turns over just like its suppose to but...... no ignition. We had ignition before the starter /solenoid problem.
Heres what I do know:
1. when the key is turned on the fuel pump spins up and pressurizes the fuel system. The shrader valve on the fuel rail has pressure, I did not use a gauge, just a rag to keep the fuel from spraying too far.
2. The dash gauges power up and the check engine light comes on. The cel turns off during start attempts.
3. The 3 relays at the back of the motor(fuel pump, ignition,and ecm) all click when the key is turned on.
4. If we attempt to start we get no ignition but we do smell fuel , not a leak, just from turning key off and on during several start attempts. Just confirms that fuel is present, but not the psi.
5. If we remove the kill safety lanyard the fuel pump does not pressurize when the key is turned on. I'm assuming the kill switch is fuctioning properly.
6. The 3 fuses down near the big red engine breaker visually apear to be good.
7. The big red engine circuit breaker is firm with no play. It sticks out about 1/4 inch and does not appear to be popped. According to other post one would definitely know if it was popped visually.
8. All breakers under the dash are in.
I have not had a chance to test the relays, but my other neighbor has an 02 prostar, different engine but same cadillac northstar ignition system, and I may swap a relay if they have the same part number.
I have not tested to see if the plugs spark during start. I'll do that today time permitting. My gut feeling is no spark signal is getting to the system. Is there a crank shaft or speed/rotation sensor on the motor that signals the fuel system or ignition and if so where is it located?
I guess I also need to check the grounds on the fuel pump and the motor.
I've looked for inline fuses (info from other threads) from the ignition switch under the dash but did not see them.
I dont know if the injectors are functioning
Does anyone have a wiring diagram they can send me.
Can anyone recommend a good service manual for this boat, a book that walks you thru the diagnostic steps needed to narrow down the cause of this problem.
I'm hopng its not the ECM but is there a DIY test for this? Hopefully the ecm didnt get fried when we tried to jumpstart the boat.
The nearest dealer is 60 plus mile away in Richmond VA. I'm not ready to throw in the towel yet.
But I need a good diagnostic resorce or some help from my MC friends/family.
I spent most of yesterday trying to analyse the problem and I caught my wifes cold, didnt sleep well so I may not get to far today. Summer colds suck..
I do plan to go back and check the wiring/connections at the starter and batterry terminals. Those are the 2 things that changed since the motor was last running. Correct me if I'm wrong here but there isnt a wire at the starter that has anything to do with ignition spark is there? Thanks
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