07-10-2011, 06:47 PM #1
- Join Date
- Jul 2011
1100 STX DI power issue please help
I am new to the forum I have a 2000 1100 STX DI
I took it out on the last week it would only rev to 4000
Rpm and barely do 22 mph. After about 10-15 minutes of riding
The motor started sputtering and she would only do 7 mph
Also The check engine light came on.
Yesterday I hook the jetski up to the hose and she would
Rev up to 8000 rpm so after that I go take
Her back to the lake and the exact same thing
That happened last week happened again.
What could be causing this?
07-11-2011, 02:52 PM #2
On DI, you need to hook up to KDIAG/pc and check what kind of error codes are stored in the ECU (aka EMM). Otherwise you will be swapping out parts like a shot-gun repair.
07-12-2011, 03:29 PM #3
water in the fuel tank will cause all kinds of problems and will def kill the fuel pump and injectors.
07-13-2011, 11:56 AM #4
07-13-2011, 12:29 PM #5
07-13-2011, 01:42 PM #6
When was last time you worked on a bad EMM?
Water in fuel tank will ONLY cause poor running.
It will not make the fuel pump run hot and cause the EMM driver chip to overheat.
You are just copying the info from the page 2-35 of the service manual.
I am speaking from my own working experience with 100's of bad EMM over 10 years.
Water in fuel tank does NOT cause the error code 59.
Do you even know which one is the fuel pump driver chip on the EMM circuit?
Bad EMM needs to be hooked up the KDIAG and see what the error code is if there is any.
That's the very first step.
Assumuption is a mother of all mistakes.
07-13-2011, 02:20 PM #7
Whatever Mr. Copy and Paste man, the internet if full of photos isnt it ? pic 2 is of what ? an Injector Driver.
go back to ya toy box now !
07-25-2011, 09:17 PM #8
- Join Date
- Jun 2011
- Dallas, TX
Meangreenman , seems like that you have lots of experience on these EMM modules. So I have couple questions for you. If this is a flaw design, is it worth it to get it repaired? in other word, how reliable is it after repair? do they just repair it or fix the flaw? if I order a new one from dealer, is it gonna be the same design?
07-27-2011, 11:01 AM #9
07-27-2011, 12:42 PM #10
> I'm not a a circuit designer so I can't say whether there is a design flaw or not. But a common sense is telling me that cooling system is extremely critical on the circuit board (EMM) with three 17-amp injector driver chips. Even if you get the EMM repaired, if your ski's cooling system has some kind of problem, the repaired EMM won't last long.
> EMM reliability mainly depends on the cooling system of your ski.
> EMM repairing shop (ie DFI) only replaces what's burnt out or broken. They are just a part replacer, not a circuit designer.
> A new EMM from dealer will have the same design as your original.
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