POS won't start

[troublemaker230]

Re: POS won't start

OK Still no luck. I fuled it so that there is gas. I "jumped it" and heard the pump running BUT when I cranked it, it would not start. Is there something I'm forgetting? I took off the filter and there is gas in it. I hear the pump running when its jumped. The motor is turning won't but won't start. Also, how come the buzzer won't go off when I turn the key?
Any ideas?

 

[troublemaker230]

Re: POS won't start

If the pump is running and the boat is not starting I'm guessing no ignition? What is the chance of the ECU beeing fried?

 

[Don S]

Re: POS won't start

Do you have spark when cranking the engine?

So far no pictures or information about your relays you said you would get.

 

[troublemaker230]

Re: POS won't start

The fuse box is identical to the picture above (4.3gxi-e.jpg). The single braker (second picture (socket.jpg)) is nowhere to be found.
There is no spark when cranking. Tried to call around and the only thing i was told that it is either ECU or ground????

 

[Don S]

Re: POS won't start

Yes, there is a possibility the ECM is bad. I was just hoping to check things out to make sure everything else is ok before saying you MIGHT need a new $1500.

The single braker (second picture (socket.jpg)) is nowhere to be found.

Not even close to what I asked or asked for.

 

[glenn property of pam]

Re: POS won't start

ok we get the idea that the relay is not closing because.......... don is asking you to check terminal 86 of the fuse panel for power when the switch is turned on so you will need to use the probes of the meter and touch where the relay plugs in. if you have power between 86 and a clean ground point then see if you have power between 86 and 85. this test should will ans 3 important questions that will help to decied where to test next

 

[Don S]

Re: POS won't start

ok we get the idea that the relay is not closing because.......... don is asking you to check terminal 86 of the fuse panel for power when the switch is turned on so you will need to use the probes of the meter and touch where the relay plugs in. if you have power between 86 and a clean ground point then see if you have power between 86 and 85. this test should will ans 3 important questions that will help to decied where to test next

Not exactly, on the fuel pump relay, there should be constant power on the 86 and 30 terminals. Ground is controlled through the ECM, not power. The ignition relay would give him spark but has nothing to do with the fuel pump relays.

I just find it hard to believe that some mechanic could destroy the ECM by cranking the engine to run the pumps. Now, if the idiot tried to jump the fuel pump relay and went to the wrong terminal with power, then he could take out the fuel pump circuit, but I don't know if that would happen or not. If it did, the the mechanic should be the one troublshooting this FOR FREE. because it would be his mistake that caused the problem.

I went to Volvo and kept after the publications guy to find a wiring diagram for the E model MPI engines, and they finally sent me a wiring diagram from Sweden. Of course there is no way to easily understand what it says, but with that and a training diagram, I think I finally figured out how it all goes together.

In case it helps anyone else wants to join in on this problem here is what Volvo sent me,

View attachment 3863226.pdf

And from my training manual.

 

[glenn property of pam]

Re: POS won't start

i see as theres power on 30 that counts out f7 as a problem. voltage between 85 to 86 should prove if the relay is a problem.

 

[troublemaker230]

Re: POS won't start

i see as theres power on 30 that counts out f7 as a problem. voltage between 85 to 86 should prove if the relay is a problem.

Are you in SW Florida?

 

[Don S]

Re: POS won't start

i see as theres power on 30 that counts out f7 as a problem. voltage between 85 to 86 should prove if the relay is a problem.

He replaced F7 and also checked it with a meter (POST 9 & 13) and jumped the relay and the pumps ran jumpered but still wouldn't start ( post 21).

So now I would guess there is problems in the ignition relay that controls the power to the ignition system and fuel injectors. Need to check relay 1 or better yet replace it with the spare and see if it runs. I know it clicks, but it could click and not be making contact electrically inside. You could also jumper it between 30 and 87 while doing the same with the fuel pump relay and see if it starts.


There was a service bulletin that replaced that relay box with a different one that had shock mounts on it. Must have been some failures with the old style. Wonder if that could be the problem.

View attachment P-37-2.pdf

 

[glenn property of pam]

Re: POS won't start

Are you in SW Florida?

im near moorehaven sw florida

 

[glenn property of pam]

Re: POS won't start

He replaced F7 and also checked it with a meter (POST 9 & 13) and jumped the relay and the pumps ran jumpered but still wouldn't start ( post 21).

So now I would guess there is problems in the ignition relay that controls the power to the ignition system and fuel injectors. Need to check relay 1 or better yet replace it with the spare and see if it runs. I know it clicks, but it could click and not be making contact electrically inside. You could also jumper it between 30 and 87 while doing the same with the fuel pump relay and see if it starts.


There was a service bulletin that replaced that relay box with a different one that had shock mounts on it. Must have been some failures with the old style. Wonder if that could be the problem.

View attachment 187211

makes sense. i was wondering if there was a trick a mechanic would use to make a fuel pump run like removing the fuel pressure switch but i do not see a fuel pressure switch on the print. Im wondering where the mechanic tied into to drain the fuel from the system.

 

[Don S]

Re: POS won't start

makes sense. i was wondering if there was a trick a mechanic would use to make a fuel pump run like removing the fuel pressure switch but i do not see a fuel pressure switch on the print. Im wondering where the mechanic tied into to drain the fuel from the system.

There is no pressure switch for the pumps. When the engine is running, idle or WOT, the pumps are running at a single speed. They do need a signal from the ignition that the engine is turning, or when the key was first turned on and they run for 2 seconds to prime the system. He gets neither.
The problem seems to be the "Mechanic" that really didn't know what he was doing, and may have damaged the ECM. That is what we are trying to determine before he spends a lot of money on a new ECM that may not be the problem.

I know if I had a boat with a lot of garbage fuel in it, I sure wouldn't want to run it through my engines very expensive fuel system to remove it from the tank.

 

[glenn property of pam]

Re: POS won't start

if i took a running boat into a shop and picked up a boat that didnt run after they worked on it then i would just return it and tell them to fix what ever they did to it. would rebooting the ecm help (remove pos lead for 5 mins to clear the memory)

 

[Don S]

Re: POS won't start

would rebooting the ecm help (remove pos lead for 5 mins to clear the memory)

No, they are designed to keep memory when the battery switch is shut off.