Please HELP! 04 air 210 won't crank been at shop for a month

[Bennett652]

I sure hope someone can help me before I go crazy messing with this boat it's a 2004 air nautique limited 210 with PCM Excalibur 330 428 hours on it. I was pulling a tube on July 4th and the motor acted like it was running out of fuel and cut off and would not crank back only spit back through the intake. When it was acting like it was running out of fuel oil pressure was normal, temp was around 165 everything was within rang and did not give any warning lights what so ever. To top off my day it was pulled back to the ramp by a ski ray...... But his boat was running so.. Took it to the shop they have checked all the fuses non blown kill switch was good relays where also checking good, hooked to computer and it's not showing any codes. So with that its spinning over and trying to crank but will kick back through the intake like its out of time. They have checked the timing and its spot on changed cam shaft sensor didn't change a thing they where certain that was the problem but it wasn't boat has in range fuel pressure on the rails spark and oil pressure builds while spinning. It's like everything is trying to work just in the wrong order I personally pulled a plug and I felt it was dry for as much as it had spun over nor did I feel like I felt a pulse from the injector while I was holding a screwdriver on it so I guess my ? Is the ECM a very expensive part to just replace not to know if that will fix the issue or not and this boat place is telling me hey that's about all we know to try now. I know there are places to pull and they can test and repair the ECM's but still it's been down a month im ready to be burning up some high test again can someone please help point me in a better direction or give any ideas other than just swiping parts now because a computer is to showing anything wrong
thanks in advance

[kylem03]

Pull all the spark plugs and see if she'll spin without any compression. Any water in the oil? You may have hydro lock if a head gasket failed or an exhaust rider gasket failed and let water in to a cylinder.

Kyle

[kmarine]

Just an idea, sometimes swapping out relays can get you going again especially if your issue is a fuel relay or operates ignition components. I would also double check all electrical connections and grounds. Welcome to computer controlled boats. My issue took only two years to solve.

[Quinner]

Initial symptoms say fuel pump. low pressure side? Have you replaced the cap as those are a known issue on that motor? What happens when u prime it before cranking? Is your mechanic a PCM dealer or a SBC guru??

[gary s]

Pull all the spark plugs and see if she'll spin without any compression.

I know nothing about Chevy's but the OP is confusing cranking with firing,a common mistake these days. It sounds as if it is turning over just fine just not starting

[surroundsound64]

I know nothing about Chevy's but the OP is confusing cranking with firing,a common mistake these days. It sounds as if it is turning over just fine just not starting

If it is indeed turning over and just not starting, did he check both the crank and cam position sensors? If it indeed will not crank, you have bigger issues. Lol

[Bennett652]

Thanks for the replies so far, no water in oil and all the plugs have been out to check them all are fine and have spark on them, there is nothing in the cylinders to keep it from firing, i tryed swaping the relays on the water that didn't help, they done fuel pressure check first 60psi on both fuel rails so it has fuel and pressure, the crank and cam sensor where replaced , still won't crank just spins over with occasional kick back through intake like it's out of time but it's not out of time mechanically, and computer is not showing any problems so I'm fairly sure it's in the ECM. I'm guessing the more I think about it I just hate to spend that kind of money on a maybe it's at a boat shop but.... the mechanic is like but the computer is saying nothing is wrong no codes or anything he is researching a company in California that he can ship the ECM to and they will test fix and send back but has anyone delt with any place like that and can make a recommendation wish I had a friend with same motor so we could swap and see but I'm the only one with the 330 and also weighing the turn around around time on checking the ECM rebuild vs new if it was for sure the problem I would have ordered already but there pricey for the maybes like I said this is making me miss my 85 ski as long as you had fuel spark and timing it would rumble down the lake

[beamons]

Have you checked the emergency switch?


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[CharlieP]

You tried replacing cap, rotor and the coil wire?

[Nautiquehunter]

How did you check the spark at the plugs? I agree with Quinner the spark will travel to the point of least resistance . When the plugs are under compression the may not be the easiest path to ground. Check Cap Rotor and Coil wire .

[Fgroce]

I also agree air, spark and fuel. Since plugs are out check compression, rule out major engine issue. Replace cap and rotor like Quinner said. Get a set of noid lights and see if voltage is getting to the fuel injectors. By all means keep a fire extinguisher around while testing. We don't want to be reading about another boat fire.

[Skidave]

Where is this boat and OP located?

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[Skidave]

I want to see this in person just to trouble shoot.

Not that I would commonly do this to a fuel injected engine, but I would shoot some starter fluid into the cylinders and see if it turns over just for a bit. If you have spark, it should At least ignite the starter fluid.

This sounds electrical or computer, but I sure would make sure the basics were well covered before sending the ecm out.

Do you have a car 'tuner' shop around? They may have a better system to probe the ecm and trouble shoot.

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[funkster]

Sure sounds like the emergency kill switch. How did you check it? New switch or did you bypass it?


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[scottb7]

old school, but can't you just pull a plug and ground to block to check for spark?