Seadoo gtx rfi problem

[steven howie]

Hi All - new member here - ive had 3 great trouble free years with my seadoo GTX RFI milleniom edition. Last outing the engine would turn over but no start - I have checked for compression and spark and they are fine - replaced fuel pump and filters and regulator. Since found that with a test light on my injector plugs they just glow dimly for a second when cranking then nothing - these should be flashing away during cranking similar to the spark plug. So i dont know if my ecu is broken or if one of its input sensors is broken - Any ideas how to check for codes or do i need a dealer to run a diagnostic ?

 

[etemplet]

I'd check your coil and if you have a spare or a buddy with a coil try swapping it out. I find the Candoo and any software is limited on what it can tell you about the RFI. Basic troubleshooting and a multi-meter work best for me.

 

[steven howie]

hi - thanks for reply - i dont think its the coil as the spark plugs are working fine - its the injectors that arent getting a signal to spray

 

[etemplet]

Oh sorry.... misread your post. Hmmmm.... Now that is an issue. I don't have those cool little devices. LOL I pull the fuel rail and have a look at the firing. Since it is shutting the injector down electrically you might not have an issue with the MPEM. What year GTX? Still need to pull that Number 4 plug off the MPEM, download those pages in the manual that show how to check each individual sensor and get out the multi meter. It's not a bad job. Warning I Noticed a misprint in the manual It shows terminal 1 instead of 11 during the TPS sensor check. If memory serves. Good Luck.

 

[steven howie]

thanks for info - its a year 2000 gtx rfi millenium edition - what manual has the info on sensor testing ?

 

[etemplet]

The repair manual. If you join here as a premium member you can view and download the manuals.

 

[steven howie]

thanks for help - not getting a resistance reading from TPS - so going to try replacing it first

 

[etemplet]

Manual says to check the wires to the TPS if you are not getting readings. Don't go thowing parts at it. LOL Good Luck.