2000 GTX RFI not running full power

[gator97531]

Hi All. I have 2 x 2000 GTX RFI doo's. Out this weekend one runs like a champ. Great hole shot and 59mph on the gauge.

My issue is the other one. At idle in the water it's only about 900rpm ( other is about 1850 ). Pushing the throttle it's slow and sluggish and only reaches about 3,400 rpm ( other is 7,650. It sounds like it's stuggling. Every once in a while your can hear it sound like it's getting ready to take off and the rpm's jump to 4,400 for a second but then dies back to 3,000 or so.

I changed the plugs thinking maybe a foul but no change.

Any ideas?

Thanks,

Gator

 

[Minnetonka4me]

UMMM....RFI are fuel injected...so you would not have replaced the fuel lines and would have no carbs.

 

[gator97531]

Rave valves? Injector cleaner?

Owned since 05 with no issues other than replacing wear rings. About 150 hours each.

Thanks for the help...

 

[Minnetonka4me]

Sorry I didnt see you edited...

I bet you have water in the gas tank....or the fuel pump is failing.

DONT dump cleaner in...take the fuel pump out and suck every last bit of gas out and swab out the tank. Check the filters in the pump while you are at it.

 

[gator97531]

thx... will do it tomorrow.

 

[ski-d00]

The RFIs are notorious for having bad rectifiers and they can do all kinds of weird running things when they go bad. Since you have two identical models, swap the rectifiers to test. It's the black box in back with two connectors. Should only take 10 minutes or so. If you buy one, I've had good luck with the aftermarket rectiers, they are only about $50 and seem to last as long or longer than the OEM.

 

[gator97531]

Okay so I put on a new rectifier and nothing. New gas and nothing. Checked wires and ohms were within reason. When I put the key on I hear the fuel pump and sounds okay. Pulled plugs to check for spark and was strong arc. New plugs and the RPM's went from 850 to 1600. Still below the normal 2000 or so that the other runs.

Going to take to lake tomorrow and see how it runs.

 

[Minnetonka4me]

New gas...did you actually take the pump out and clean the tank out?

 

[q45lover]

I am having the exact same problem with the exact same ski... Please keep us posted on what your fix ended up being...

 

[Bills86e]

RFI performing poorly

Go to Basics: Doo a compression test first. Then fuel pressure test. 59 pounds. See If those check out.
Could just need *plugs gapped correctly!
An RFI engine that runs poorly or does not run at all may be the result of a sensor malfunction, poor fuel pressure, clogged fuel filter, bad throttle position sensor or a throttle position sensor that is not adjusted properly, Incorrect spark plus and last but not least a BATTERY That does not have proper voltage while cranking over the motor. Voltage should read above 12.4 before start-up, and about
10.5 while cranking. Do you have any moisture/water in the E-box? http://partsfinder.onlinemicrofiche.com/seadooforums/Seadoo_oem/Seadoo_PWC.asp?Type=13&A=77&B=7

 

[q45lover]

Go to Basics: Doo a compression test first. Then fuel pressure test. 59 pounds. See If those check out.
Could just need *plugs gapped correctly!
An RFI engine that runs poorly or does not run at all may be the result of a sensor malfunction, poor fuel pressure, clogged fuel filter, bad throttle position sensor or a throttle position sensor that is not adjusted properly, Incorrect spark plus and last but not least a BATTERY That does not have proper voltage while cranking over the motor. Voltage should read above 12.4 before start-up, and about
10.5 while cranking. Do you have any moisture/water in the E-box? http://partsfinder.onlinemicrofiche.com/seadooforums/Seadoo_oem/Seadoo_PWC.asp?Type=13&A=77&B=7

What is the best way to test the fuel pressure? I am not getting a maintenence light.. Is there not a fuel pressure sensor that will alert the computer that there is a fuel pressure problem? I appologise if that is a dumb question I am new to the RFI 2 strokes...

 

[Minnetonka4me]

Did you actually clean the tank out, or just put new gas in?

 

[q45lover]

Did you actually clean the tank out, or just put new gas in?

I am not the tread originator but I am having the exact same problem he is... I have not changed the fuel or cleaned the tank... I really think my fuel is fine... The ski has always been garaged and i always keep the tank full... Plus it ran great in the morning and then started to act up in the afternoon without any fuel addition...

 

[Minnetonka4me]

You can assume it...but you never know. these machines cannot deal with water in the gas.

OK...so start at the basics...check compression, do you have a low voltage light? You maybe able to rent a pressure tester from an auto parts store...I'm pretty sure its the same connector as a car has.

I just pulled apart this machine with 250 original hours...this thing must have run for 10 of it with bad gas...





The ring was nowhere to be found!!!



The funny thing is the cylinder hadly had a scratch in it!

 

[gator97531]

Okay so best as I can tell. I changed the rectifier and nothing so I changed back. Checked wires and no issues. Pulled plugs and plenty of spark.

Changed plugs, added can of sea foam and a bottle of stp water out ( or something like that )... Ski is now idle at 1400 in the water vs 800 but runs strong again. Top RPM's were 6900 and speedo hit 57. Ran for an hour, sat for 10 mins ran for 30 and all seemed okay. Still not happy with 1400 rpm at idle ( other exact same ski is at 2200 in the water ) but I am going to research changiing the idle setting.

I will run again during the week. Going to try and run the ski as close to out of gas as possible then dry the tank and put fresh gas and see if that brings rpm's back up. besides the low idle ski ran good and great day on the water in central florida.

 

[Minnetonka4me]

I would top it off for sure...using additives isnt the way to fix the problem.

 

[q45lover]

I took it to the dealer and they told me it had like 30 fault codes... They wanted to clear the codes and do a water test... I told them to clear the codes and I would take it out again knowing that I had ordered the CanDoo Pro Scanner. I took it out and it still ran poorly... It runs but wont go over 3,500 RPM's... it wants to take of with a few sputters but it never does...

Ok so I bought the CanDoo Pro and scanned my 2001 GTX RFI today and these were the error codes that came up... I have no idea where to start...

P0604 RFI ENGINE MODULE RAM OR EEPROM DEFECTIVE
P0605 RFI ENGINE MODULE EEPROM DEFECTIVE
P1600 CLOSED TPS OR IGNITION OFFSET NOT PROGRAMMED
P1601 RFI ENGINE MODULE DATA OUT OF RANGE 1/3 BYTES
P1602 RFI ENGINE MODULE DATA OUT OF RANGE 3/3 BYTES
P0562 RFI ENGINE MODULE POWER-UP VOLTAGE UNDER LOWER LIMIT
P0563 RFI ENGINE MODULE POWER-UP VOLTAGE OVER UPPER LIMIT
P0117 ENGINE TEMP SENSOR ABOVE UPPER LIMIT
P0118 ENGINE TEMP SENSOR UNDER LOWER LIMIT
P0116 ENGINE TEMPERATURE SENSOR MALFUNCTION
P0122 TPS UNDER LOWER LIMIT
P0123 TPS ABOVE UPPER LIMIT
P0219 MAXIMUM ENGINE SPEED EXCEEDED
P0335 ENGINE SPEED SIGNAL NOT DETECTED
P0336 ENGINE SPEED SENSOR SYNCHONIZATION ERROR
P0112 INTAKE TEMPERATURE SENSOR ABOVE UPPER LIMIT
P0113 INTAKE TEMPERATURE SENSOR UNDER LOWER LIMIT
P0107 INTAKE PRESSURE SENSOR UNDER LOWER LIMIT
P0108 INTAKE PRESSURE SENSON ABOVE UPPER LIMIT
P0262 MAG FUEL INJECTOR SHORTED TO BATTERY VOLTAGE
P0261 MAG FUEL INJECTOR SHORTED TO GROUND
P1200 MAG FUEL INJECTOR OPENED
P0265 PTO FUEL INJECTOR SHORTED TO BATTERY VOLTAGE
P0264 PTO FUEL INJECTOR SHORTED TO GROUND
P1201 PTO FUEL INJECTOR OPENED
P0230 FUEL PUMP RELAY SHORTED TO BATTERY VOLTAGE
P0478 RAVE SOLENOID SHORTED TO BATTERY VOLTAGE
P0477 RAVE SOLENOID SHORTED TO GROUND
P0479 RAVE SOLENOID OPENED