01 GTX Di No start. Getting spark & fuel

[seej918]

Hey everyone. Freshly rebuilt my 947 Di, went to start motor and motor cranked and cranked and cranked. Checked inline spark and it is getting spark. Motor is getting fuel as it’ll shoot a fireball occasionally and can smell fuel on plugs.

When I put key on DESS post, I’ll get the 2 chirps and one long beep which usually means no connection to MPEM. I had a new key programmed and still the same outcome. Becoming very frustrated and discouraged with this. Unsure what to do next, is there a way to check if MPEM is bad? Really don’t want to buy one and still have ongoing issue.

I thank you all in advance

 

[etemplet]

Don't go after the ECM check everything else first. If you're getting spark it's not getting fuel. Verify Battery voltage (hot) check fuel pressure. Verify you have all of the plugs connected in the right places. Check fuel pressure and air pressure. Did you get the fuel and air injectors serviced?? Are all your hoses connected properly? If you known anyone with a Candoo that would help you. You have to make sure your injectors are firing. Take your time, follow the book. Good Luck !!

You got the correct spark plugs in that thing?? That almost got me .... LOL

 

[seej918]

Don't go after the ECM check everything else first. If you're getting spark it's not getting fuel. Verify Battery voltage (hot) check fuel pressure. Verify you have all of the plugs connected in the right places. Check fuel pressure and air pressure. Did you get the fuel and air injectors serviced?? Are all your hoses connected properly? If you known anyone with a Candoo that would help you. You have to make sure your injectors are firing. Take your time, follow the book. Good Luck !!

You got the correct spark plugs in that thing?? That almost got me .... LOL

I've got NGK ZFR4F-11's in it, so those should be the correct plugs. I'm trying to figure out if the solid beep I'm getting will prevent the ski from starting. Fuel pressure may be my next test if the solid beep does not affect the ski starting. I've replaced all o-rings going to fuel rail and o-rings on top of air injectors. After studying air house routing, I'm confident when I say the hoses are properly connected. I even went as far as rechecking my timing on magneto cup and we are good there.

 

[etemplet]

I had a RFI that gave me two chirps and then a long beep. The display indicated "Low Battery Voltage." It wasn't till I opend the ECU that I found it very wet inside along with some corrosion (those ECM are different from the DI) . I cleaned it all up and dried it out and the ski started just fine. Not sure if you checked yet but the Rectifier can cause some strange issues on the DI. One of mine wouldn't accelerate when I applied throttle.

I was tracing a fuel indicator issue yesterday on a RFI. The Bottom plug on the ECM had corrsion inside. I cleaned it up and the gauge began indicating fuel level. Lots of opportunities for bad electrical connections on these skis.

 

[seej918]

I had a RFI that gave me two chirps and then a long beep. The display indicated "Low Battery Voltage." It wasn't till I opend the ECU that I found it very wet inside along with some corrosion (those ECM are different from the DI) . I cleaned it all up and dried it out and the ski started just fine. Not sure if you checked yet but the Rectifier can cause some strange issues on the DI. One of mine wouldn't accelerate when I applied throttle.

I was tracing a fuel indicator issue yesterday on a RFI. The Bottom plug on the ECM had corrsion inside. I cleaned it up and the gauge began indicating fuel level. Lots of opportunities for bad electrical connections on these skis.

I cleaned out the connector and pin side of the ECU. I was hoping I could tear into this ECU but its sealed. If I hooked a Candoo Pro up to it would it possibly tell me what the issue is? Rectifier is about the only thing I haven't replaced on this ski. When I had the cover off, everything seemed very clean. If MPEM was bad would a key not be able to program to it?

 

[etemplet]

Two Chirps is always a good sign that everything is working. Did you check your grounds?

With the Candoo if you are getting activity and it is recognizing the key the Candoo should be able to talk to the ECU. I'd verify the fuel system before anything else.

 

[seej918]

Two Chirps is always a good sign that everything is working. Did you check your grounds?

With the Candoo if you are getting activity and it is recognizing the key the Candoo should be able to talk to the ECU. I'd verify the fuel system before anything else.

Only 2 grounds I know of are good. I received this thing in shambles and of course nothing was labeled

 

[WaarrEagle]

Another benefit of the CanDoo is that you can individually activate the spark plugs and injectors to hear if they work. It may give you some codes as well that could be helpful.

 

[seej918]

I'll get a video up tonight of what is going on. I got rid of my 1 long beep issue so we can rule out bad MPEM. Also have a fuel pressure/air pressure tester on the way. What are the odds bad gas is causing this?

 

[etemplet]

Another benefit of the CanDoo is that you can individually activate the spark plugs and injectors to hear if they work. It may give you some codes as well that could be helpful.

I only used the Candoo on (1) DI and I was surprised at its capabilities with that model. Very cool !!

 

[etemplet]

I'll get a video up tonight of what is going on. I got rid of my 1 long beep issue so we can rule out bad MPEM. Also have a fuel pressure/air pressure tester on the way. What are the odds bad gas is causing this?

Those fuel tanks get get a lot of crap in them. I generally pump the whole tank dry and wipe the inside. You never know what is in there. I have a ski right now the fuel is 15 months old. I'm running it out on the water.

I'd go for a fuel delivery problem first like you are doing. If you didn't get the injectors serviced that could be an issue. I get the fuel injectors serviced on every ski. Most of these engines fail because they run lean. Your engine should start right up when you hit the button. That is a reason to love the DI's

 

[seej918]

Those fuel tanks get get a lot of crap in them. I generally pump the whole tank dry and wipe the inside. You never know what is in there. I have a ski right now the fuel is 15 months old. I'm running it out on the water.

I'd go for a fuel delivery problem first like you are doing. If you didn't get the injectors serviced that could be an issue. I get the fuel injectors serviced on every ski. Most of these engines fail because they run lean. Your engine should start right up when you hit the button. That is a reason to love the DI's

I have not had the injectors serviced (injectors on rail I am assuming?) I did replace o-rings on air injectors.
Planning on pulling pump tonight and replacing strainers. Is there a way to service injectors on rails? Rather mark that off the list too...

 

[etemplet]

I send my injectors to fuelinjectorman.com There is a new owner but he is doing a good job. DALE the original owner told me that the air injectors cause more problems than the fuel injectors on the DI. I send all my injectors to them because i don't want to fool with it. $20 each. People here have tested the injectors and cleaned them. DALE was always adamant about NOT putting injector cleaner or anything through the injectors, said it ruined them. ONLY FUEL he would say.

Of course make up your own mind. I did my reasearch and this is the route I choose to take. Injectors are way easier for me than building carbs and cheaper too. LOL They are either working or they are not.

 

[WaarrEagle]

I send my injectors to fuelinjectorman.com There is a new owner but he is doing a good job. DALE the original owner told me that the air injectors cause more problems than the fuel injectors on the DI. I send all my injectors to them because i don't want to fool with it. $20 each. People here have tested the injectors and cleaned them. DALE was always adamant about NOT putting injector cleaner or anything through the injectors, said it ruined them. ONLY FUEL he would say.

Of course make up your own mind. I did my reasearch and this is the route I choose to take. Injectors are way easier for me than building carbs and cheaper too. LOL They are either working or they are not.

I sent my DI injectors to him as well. Of course my DI is still not running yet, for unknown reasons, but I hope that changes shortly after reinstalling my 2x rebuilt motor!

 

[seej918]

Here’s a short video I made of what I have going on

 

[etemplet]

Here’s a short video I made of what I have going on

I can't believe you're actually trying to start that thing with the exhaust system removed. you're definitely standing in the wrong place. That sucker will shoot and unbelievable flame out of that manifold plus deafen you. Yes, I've done it. I wouldn't do that one.

Looks like you are getting some fuel but that could be misleading. I think a spark would have done something. You didn't swap the Mag flywheel did you? Isn't there some kind of sensor on the exhaust system near the water box? I wonder what effect it has on the system if the exhaust is disconnected and it isn't reading. I'd put everything together and the airbox on. Easier to troubleshoot and you can reach the stuff you need to. Good Luck !

 

[seej918]

I can't believe you're actually trying to start that thing with the exhaust system removed. you're definitely standing in the wrong place. That sucker will shoot and unbelievable flame out of that manifold plus deafen you. Yes, I've done it. I wouldn't do that one.

Looks like you are getting some fuel but that could be misleading. I think a spark would have done something. You didn't swap the Mag flywheel did you? Isn't there some kind of sensor on the exhaust system near the water box? I wonder what effect it has on the system if the exhaust is disconnected and it isn't reading. I'd put everything together and the airbox on. Easier to troubleshoot and you can reach the stuff you need to. Good Luck !

I've gotten a few flames when I put fuel directly in the cylinder and start it. Safe to say spark is there lol.
Negative, as far as I can tell I was the first to take off the mag flywheel. I've even checked part number on mine and it is correct for an '01.

New news to me on the sensor. Yeah I may throw the rest of it together as I think it's a fuel pressure issue. Still working on getting the fuel pump out, definitely not a fun one to do.

 

[etemplet]

In the video I saw some puffs come out of the exhaut manifold but there were inconsistent with timing.

I'll be interested in the set up you use for testing the fuel and air pressure. I bought a DI Fuel Rail with all the parts and lines so I could set something up for testing. The best route I see thus far is the modify the line and install a Tee, one on the air pump side and one on the fuel pump side. I'll use these for testing only. Good Luck !!

 

[seej918]

Here’s the external strainer. Opinions? Also started siphoning fuel from the tank, rather have a fresh start

 

[etemplet]

How did the inside look? Was it breaking down? Better to change them Did you replace the internal filter? I pulled these off my first RFI. REplaciing the filters on the canister are a very high priority for me. Be careful reassembling the canister and insure everything lines up as it should. Good Luck.

 

[WaarrEagle]

It looks in need of replacement but the only real tell is to measure pressure. Dont forget about the in-line filter between the tank and the rail.

 

[Poormanracing]

Number one put the exhaust on!number 2 put the exhaust back on!had a few di skis catch fire.how is the air pressure have had machines do the same thing and it be low air pressure just because the injectors are working and spraying fuel doesn't mean it spraying it into the combustion chamber.compression will block it from coming out of the rail.even with that nasty fuel sock it should at least give you a fire

 

[bsbracing]

did you check the reed valves? also one long beep means there is a code coming up in the ecu.

 

[bradmccullum]

Hey everyone. Freshly rebuilt my 947 Di, went to start motor and motor cranked and cranked and cranked. Checked inline spark and it is getting spark. Motor is getting fuel as it’ll shoot a fireball occasionally and can smell fuel on plugs.

When I put key on DESS post, I’ll get the 2 chirps and one long beep which usually means no connection to MPEM. I had a new key programmed and still the same outcome. Becoming very frustrated and discouraged with this. Unsure what to do next, is there a way to check if MPEM is bad? Really don’t want to buy one and still have ongoing issue.

I thank you all in advance

If it shoots a fireball or backfires than your timing is probably off or carbs aren’t adjusted right. Shouldn’t do that.

 

[Poormanracing]

Reeds would still let it start on a di.one l8ng beep after you get a double beep with it turning over and everything sparking and pumping means a sensor not seeing something.you didn't mess up the air intake pressure sensor and the intake pressure sensor with the throttle position sensor?