01 GTX DI problem

[Fly-Boy]

Well let me start by telling what has happened. Last year the steering mech. in the rear broke which allowed water to get into the ski and it sank filling the inside to about halfway. It sat in the water for about a week.

After I noticed this I pulled it out of the water and pulled the plugs turning the engine over to spit out all the water. Once it was clear I coated the cylinders with WD40 over and over. I opened the dry compartment inside the ski which holds the starter solenoid and it was full of water as well.

Well after I did all this I had trouble starting it but I eventually found out it was one of the ignition coils so I replaced it and now I am getting spark to both plugs and it fires right up and idles around 1450 rpms.

The problem I am having is that when I pull the throttle it doesn't rev the engine up. It just bogs a little but doesn't shut the engine off. It may go down to about 1300 rpms. The maintenance light is on but from all the post I have read it is on on just about everyone's DI.

At the point I really don't know what to check. I really wanted to fix it myself b/c I have read about 100 post where people take there GTX DI to a certified mech. and they charge them a ton on money and never fix the problem, and usually can not even diagnose it.

Thanks for any help you can give me

 

[Dr Honda]

well... if it starts... then at least the electronics are working.

Did you drain the oil, and fuel... then refill them with fresh?

Do you have a factory service manual?

Have you cheked:

1) compression
2) fuel pressure
3) air pressure

??????


Put in 2 fresh plugs, and start the engine. Give it about 30 seconds, and check the plugs. Are they wet? Are they fouled? Are both cyl's running? (a Di at idle only runs one cyl, so you have to try to rev it up)

 

[Fly-Boy]

OK Lets See

I have not drained the oil or fuel b/c the water was more in the back of the ski since it was sitting in about 3 feet of water when it sank on the bank. The front of the ski was really not in the water.

I do not have a service manual but I am currently trying to find an electronic one online now.

I know how to check the engine compression but I am unsure how to check the fuel and air pressure.

As for the cyl's. I have put a spark tester on both plugs while idling and I am getting spark to both plugs according to my light.

I will put two new plugs in today if it stops raining here to see what they do. As for rev'ing it up, I cant. That is my problem is that it want rev up.

 

[Dr Honda]

OK Lets See

I have not drained the oil or fuel b/c the water was more in the back of the ski since it was sitting in about 3 feet of water when it sank on the bank. The front of the ski was really not in the water.

I wouldn't chance it. It was sunk... and I would drain it. If there is any water... it's going to cause problems in a Di. A carb ski may be able to pass it... but remember... you are injecting fuel under VERY high pressure, directly into the cyl. Water doesn't compress the same, and it doesn't burn. Not to mention... it will rust the pump, injectors, and regulator internally.

I do not have a service manual but I am currently trying to find an electronic one online now.

If you spend the $10 to become a premium member here... you can DL it.

I know how to check the engine compression but I am unsure how to check the fuel and air pressure.

This is why you need the FACTORY manual. You won't get a Di ski running without it. They are complex beasts.

As for the cyl's. I have put a spark tester on both plugs while idling and I am getting spark to both plugs according to my light.

I will put two new plugs in today if it stops raining here to see what they do. As for rev'ing it up, I cant. That is my problem is that it want rev up.

Spark test won't tell you much. You need to look at the plugs to see what the cyl is doing. I know it won't rev up... but if you pull the throttle... it's going to try to run both cyl's. A clean set of plugs is the only way to know for sure. Besides... they are only about $2 each.

 

[Fly-Boy]

OK Gotcha

I just downloaded the manual and wow is it extensive. I will have the get the gauges in order to check the pressures.

Also I will get 2 new plugs today. I will do what you said and run for 30 secs and attempt to rev it up and I will post the pics of what each looks like so you can see.

Thx Nick

 

[Dennis]

There is a possibility that the "MAINT" message and won't rev up mean that the ski is in limp mode. There are two situations that the MPEM will not let the engine rev (idle only). One is the battery voltage is too high. Start the engine and check the battery voltage with a volt meter. It should not be over 14.5 volts D.C.
Second is a problem with the throttle position sensor/s. The service manual will tell you how to test them. Good Luck.

 

[Fly-Boy]

Well crap.... I did not know that about the battery. Since I just got them out I haven't bought batteries yet and I was using the engine start feature on my auto battery charger. I will go get a battery, reset the maint. light and see how that goes as well. I have a 99' GTI and I can start it off my jumper and it will rev up but then again it doesn't have a MPEM system.

Thx for that info.

 

[Fly-Boy]

OK... This is why I love these forums. I hooked an actually battery up to the ski and it cranked right up and rev'd up to 5500 but I didnt want to push it. I will go tomorrow and put it on the lake to see if it is really OK.

Also I will go ahead and drain the fuel and oil to make sure everything is fresh.

Thx for all your help. I really appreciate it.

 

[Dennis]

NEVER,EVER,EVER use that start feature on a charger to start a ski......any ski!!!. You stand a REAL good chance of burning up the MPEM when you do that.

 

[Rotor13B]

Well crap.... I did not know that about the battery. Since I just got them out I haven't bought batteries yet and I was using the engine start feature on my auto battery charger. I will go get a battery, reset the maint. light and see how that goes as well. I have a 99' GTI and I can start it off my jumper and it will rev up but then again it doesn't have a MPEM system.

Thx for that info.

GTI has an mpem, What makes you think it doesn't?

 

[Dr Honda]

Yep... what they said.

Glad it was working better with a good battery.

 

[forrest66]

Hello,
I also have the same seadoo. They are a pain in the butt.. Everything must be exactly perfect for them to keep running good. First if you are able to work on any type of engine then this is no different. Do what i have done in the past and pay to be a full member and use all the resources that they have. They really have alot and you can pretty much do it all yourself. I have fix mine many times just from reading and downloading all the info on here.
Mine is down again. Need to do the top end on it now. By the way my maintenance light is only on when there is a problem. If yours is on the computer is picking up a problem and you need to figure out what it is.

 

[Fly-Boy]

I didnt think my 99' GTI had one since it wasnt fuel injected and I can rev it up when started with the charger. Also the start feature only puts out 265 cranking amps but it must be the voltage.

I want use it ever again on a ski....

Thx though for the info. Learn something new everyday....

 

[Dennis]

Yes, the voltage is the problem and by the way.......BAD Fly-Boy! BAB BAD Fly-Boy! Now go to your room and think about what you have done! :rofl:

 

[Fly-Boy]

LOL!

Thanks Guys for all you help and info... I put them in the water this weekend and they both seem to running great for now. If I need anything else at least I know where to come.

Again Thanks Sooo Much!
Nick