99 GSX rfi surging problem at wide open throttle - PWC Forum: The best hang-out for Personal WaterCraft enthusiasts
 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 04-05-2019, 06:15 PM Thread Starter
Junior Member
 
Join Date: Apr 2019
Posts: 4
99 GSX rfi surging problem at wide open throttle

I've got a 99 seadoo gsx that I owned a few years. A year or so back the throttle cable came off of the lever in the handlebars then I attached it and ever since it feels like the ski is on a rev limiter past about half throttle. But at half throttle I seem to get all the power the ski wants to make. 50mph or so. So if i squeeze the throttle past half it will hesitate rapidly and feel almost like it's missing while not accelerating further.

This I've replaced. Rectifier, battery, plugs, I've clipped the ends off the plug wires, I've clean cleaned the injectors.

Now I know that these skis have a tps reset procedure involving a scanner. I'm wondering if that's what I'm going to have to do.

I pulled the raves out a little and they moved freely. I'm not sure if cleaning them would fix this
Kyle Spatula is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 04-05-2019, 06:17 PM Thread Starter
Junior Member
 
Join Date: Apr 2019
Posts: 4
I also replaced
The tps with a used one and no change. Still behaves exactly the way it always does
Kyle Spatula is offline  
post #3 of 6 (permalink) Old 04-05-2019, 07:51 PM
Super Moderator
 
rodsatheart's Avatar
 
Join Date: Oct 2014
Location: Mena, Ar.
Posts: 4,808
Dock
Sounds like the cable is not seated all the way. Double check and make sure the end of the cable is seated. Some cables actually snap into the throttle so it doesnt come out.
rodsatheart is online now  
Sponsored Links
Advertisement
 
post #4 of 6 (permalink) Old 04-06-2019, 12:28 AM Thread Starter
Junior Member
 
Join Date: Apr 2019
Posts: 4
But wouldn't a throttle cable issue mean that the throttle plate wouldn't not fully open? Wouldn't This manifest as just lower top speed and rpm and not a hesitating miss?
Kyle Spatula is offline  
post #5 of 6 (permalink) Old 04-06-2019, 05:31 AM
Super Moderator
 
rodsatheart's Avatar
 
Join Date: Oct 2014
Location: Mena, Ar.
Posts: 4,808
Dock
If it's throwing the tps off even the slightest, the computer doesn't know what to do. The computer is looking for a specific voltage at that throttle position. It could be that the cable was not seated in the first place, and it and the tps were adjusted with it like that. It sounds like it's running lean. If you have the manual, it should outline the correct way to check and adjust the throttle cable and tps. Most tps's can be checked with a digital volt meter. Your check looking at the voltage at closed and full throttle. If you've ever worked with automotive system, the principle is the same. The clincher is it should be throwing a code for a bad tps if that is the issue.
I'll do some hunting and see if I can find the specs and procedure.
Also keep in mind that it may be lack of fuel, so you might want to pull the pump assy. and check the pump sock, and check fuel pressure.
Either way, I would refrain from riding it until it's fixed.

Last edited by rodsatheart; 04-06-2019 at 06:20 AM.
rodsatheart is online now  
post #6 of 6 (permalink) Old 04-06-2019, 06:18 AM
Super Moderator
 
rodsatheart's Avatar
 
Join Date: Oct 2014
Location: Mena, Ar.
Posts: 4,808
Dock
How old is the battery ? If it is even slightly low, the computer will limit rpm.
How old are the plugs ?
Look and make sure the throttle stop is hitting the throttle stop screw. The tps set procedure just sets the tps to the fully closed throttle position, then you have to reset the idle speed.

ENGINE STARTS BUT RUNS
POORLY
If the engine starts but runs poorly, the following
items should be verified in this order:
– Check spark plug condition.
– Check fault codes in the ECU memory.
– Check fuel pressure.
– Check TPS adjustment.
If some work has been performed on the unit,
make sure injector wire connectors were not
mixed. It is also possible that the RAVE solenoid
connector be mixed with one of the injector con-
nector. Refer to the wiring diagram for wire colors
and positions.
ENGINE STARTS BUT STALLS
AFTER APPROXIMATELY
30 SECONDS
The RPM signal (GREY wire) is short circuit to the
ground. Check wire condition. If the wire test
good, either the tachometer or Info Center is de-
fective.
ENGINE CANNOT REACH
MAXIMUM REVOLUTIONS
Check battery voltage. When voltage is too low,
the MPEM limits the engine revolutions.
Recharge or replace battery.
The RAVE system is not functioning properly. The
sliding valves do not open. Check pressure hoses
and check valve from crankcase to RAVE solenoid.
Check RAVE solenoid

Last edited by rodsatheart; 04-06-2019 at 06:27 AM.
rodsatheart is online now  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the PWC Forum: The best hang-out for Personal WaterCraft enthusiasts forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
2001 GP800r throttle sticking wide open. Jmsabo Yamaha Jetski 8 07-05-2016 01:50 PM
1100zxi wide open mediceric Kawasaki Jetski 1 06-17-2012 12:53 AM
Throttle WIDE open!! ronqqq Yamaha Jetski 4 07-11-2011 03:21 PM
Polaris SLT 700- running wide open Troublemaker01 General PWC & Jetski Discussion 1 09-11-2010 11:42 AM
SL 750 Starts/Runs only wide open aclarc Polaris Jetski 5 09-05-2010 07:29 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome