New motor installed and won't start

[Matt9712]

Hey guys I have 2006 four winns 210 horizon that has the volvo penta 5.7 Gi-F engine. Last summer the crankshaft broke still not sure how but anyways since I have installed a new longblock and reinstalled in the boat. The motor will crank and crank but won't fire. I have a very weak spark coming directly from brand new ignition coil. I replaced the camshaft position sensor as I've run into this before with a spark issue. It didn't fix the problem. My timing is close as I can get manually with out the engine running so I don't believe that to be the issue. I feel it's either the ignition module and or distributor but that's just guessing by what I've read on forums and more forums. Any ideas if it sounds more like ignition module,distributor, timing off a little or something else? Also does anyone know if I have to use a computer or shunt tool to set timing on this model engine once I get it fired up? Thanks in advance for your help

 

[alldodge]

Not a VP guy but do know your motor is not timed using a timing light. You have the HVS distributor and the motor is brought around to TDC on number one. Then the distributor is installed as in the pic below. There is no further adjustment unless its not running very well

 

[Matt9712]

Thanks for the help. I reset timing to look exactly like pic and there was no change. I replaced the ignition module this afternoon too. Boat still won't fire it seems to have a little better spark but doesn't seem strong. It is a yellowish spark and I would expect a blur right from coil. I pulled the plug they were all wet and black which makes me believe it's definitely a spark issue as it seems fuel is getting there. But I have been wrong before

 

[Matt9712]

Seems like I figure one thing out another issue pops out..... It seemed to have a bad ground so I ran a new cable to a good ground on block and now have spark. I put noid tester on injectors and not getting a consistent pulse on the light cranking. I ohmed them all out and they are 12.4 ohms so it appears injectors are good. Really wish the scan tools weren't big money and shops aren't 3 weeks out as this eating up my water time. Back in the 90's I could short the OBD out with paper clip and count the light flashes is this possible on these? Shot in the dark but be nice if I could. Thanks

 

[Matt9712]

1 more thing if I dump gas into throttle body it will run for about 3 seconds and then die.

 

[alldodge]

You previously said that your plugs were all wet and black and its probably a spark issue.
Now you can put gas down the throat and it runs for a few seconds.

Maybe you have water in your gas, :noidea: but pulling the plugs and finding them wet its either fuel or water

Since you just pout the motor in, I'm still thinking you have something connected wrong or something not connected, or water in the fuel

 

[Matt9712]

Ya I didn't have spark originally. It appeared to be a bad ground that's why I ran new cable from existing stud to known good ground stud on block. Seemed to have spark for at least a couple minutes as now I have strong spark at coil but only about 4-5 While cranking and then just stops sparking. I put fresh gas in so I don't think water in gas is issue. After I filled it up about 10 min later I noticed gas coming from cap and that floor was bowing up above gas tank. I removed access plate to investigate and pulled vent line off........ when I did it was like I popped a balloon crazy air came out and gas tank deflated. My day gets better and better

 

[alldodge]

pulled vent line off........ when I did it was like I popped a balloon crazy air came out and gas tank deflated

You happen to have the fuel pump connected backwards?

 

[Matt9712]

No because when I put fuel pump in the other day I used gas can to pull new fuel into system. That would be my luck tho lol

 

[alldodge]

OK so what pressurized the tank?

 

[Matt9712]

No clue.... I had just topped it off when this started happening. I only had to add about 3 gallons to top it off. Been cranking this thing all weekend with same setup and had it pulling fresh gas out of gas can that's my only reasoning that it couldn't be backwards and I label everything when I take things off so I know they go back to right spot

 

[Dave-R]

First off Matt your vent line must be plugged in order to pressurize the tank. Lucky it did not burst. I would disconnect the main tank, and try to operate from a small tank or can of gasoline. I have a hard time thinking a pump could be pumping backwards. If your vent was plugged, just the heat of the day will pressurize the tank, like a plastic gas will when warmed up. Then If the engine will not start, check fuel pressure on both the low and high pressure pumps. Let us know what you fine. Dave-R

 

[alldodge]

IF you have spark and your not getting gas, then put a ounce of gas down the throat of the TB and see if it fires

 

[Matt9712]

Ya it was definitely hot here today too. I think I might have just over filled it and reason being is I disconnected vent line from gas cap side and blew into it. I heard bubbling and then it shot more air out.so I think the vent might actually blocked by gas in tank if that's even possible. I need to check fuel pressure but I have to get the tools to do it. I had spark for a little bit ( not sure why it's intermittent) when it did fire I put gas directly in throttle body and it fired up for prob 2-3 seconds. Now I have good spark right at coil while cranking but it only fires about 4-5 times then stops even while boat is continuing to crank. But I have no spark at plugs ( not even a couple like coil does). I changed the rotor but the cap is still the same as it takes time to order a marine one. Not sure why it's intermittent I would much rather have it not work at all....

 

[alldodge]

I'm a Merc guy and with what your telling me I would be thinking about the CPS, but VP are a bit different so
Hey muc this guy needs some help with a VP

 

[Dave-R]

There is probably something the ECC does not like. Without a Rinda or some other scan tool it is very difficult to find. Kinda like chasing your tail on some of the electronics. I had to bite the bullet and buy the Rinda Diacom . Best investment I ever made. Include are many troubleshooting manuals. Make sure you have power to the fuel injection relays, and check all the fuses for power. Good luck Dave-R

 

[Matt9712]

Thanks. I finally threw in the towel and dropped off at a shop on Monday.... hopefully it won't take too long and turns out to be a quick not too overly expensive fix

 

[Matt9712]

Shop called.....they "think it's the ECM. They said they cleared all codes with the exception of one that won't clear. It's 0330 ( should've wrote it down but I know it's 03 something pretty sure 0330 ) it's something to do with the crank sensor. Said when they pulled my crank position sensor it looked beat up and installed a new one they had around shop and the code still wouldn't clear and boat still not fire consistently. They said they checked for bad grounds and all wiring seemed fine. They also said the tach was inconsistent just like the spark. ........ ECM is around $1600 and an expensive guess to be wrong. This is a very reputable boat shop with great reviews so it's not a backyard mechanic but still not fond of dropping all that money on "think it's the problem ". Does anyone know if they can be reflashed, and or tested and wouldn't the boat not get any spark if ECM is bad and not an inconsistent one? Thanks

 

[alldodge]

You can send it to Bob at ODB Diagnostics and he can test and fix if its fixable. If not fixable he also sells them

https://www.obd2allinone.com/mefiecms.asp

 

[Matt9712]

I'll have to look into that. Thanks. Is there anyway to check a crankshaft position sensor? Should it be seeing 12v at connection? Should sensor have continuity? Thanks again