2004 GTI LE RFI FUEL ISSUE MAYBE

[NIL8er]

-rebuilt engine, new crank, pistons, rings, cylinders honed, compression in spec.
-swapped ALL electrical from running exact same year model seadoo.
-fuel pump and injectors from running ski.
-will not start .. injectors are spraying, spark is there will start with gas in intake, pistons are oriented correctly
*definitely seems like not getting fuel but injectors , rail , pump are from from working ski.
TPS set with Candoo pro.
CPS clean
ANY THING IM MISSING? cheers!
**DOES ANYONE KNOW DEFINITIVELY IF THE RFI MAGNET CUP HAS A SPECIFIC ORIENTATION ON THE FLYWHEEL SINCE THERE IS NO MAGNETS RAISED UP ON OUTSIDE OF THE CUP?

 

[etemplet]

I have never checked spark timing on any of these engines. That might be someting to consider. Is the Candoo able to check this? Are your plug wires on the correct cylinders?? I don't think they are long enough to swap but it is worth a check.

I posted some pictures of my mag flywheel on another thread dealingwith the same question about hub orientation. What numbers are on your hub and is it the correct one. I'm wondering if Seadoo used a different hub on different models.

Check fuel pump pressure.

Go to plug 4 on the ECM and begin checking the resistances on the components. Pay special attention to the air pressure sensor. That one is sneaky. Also, do you have the air pressure sensor and TPS plugged in correctly? Those plugs can be swapped as can one of the fuel injector plugs (I think the PTO).

Personally I've never had a RFI even try to start when I induced a little extra fuel into the intake system.

 

[NIL8er]

Thanks yeah that's my thread also. The pics didn't help with orientation. It got muddy with all the changes therefore I'm starting over.
It's not the mpem. It's been swapped from a running ski as with ALL other electronics even wire harness.
Definitely fires up for a few seconds with fuel in the intake.
I'm 99% sure on the correct plugs to tps and aps, the length and way there shaped. I'll switch them if possible.
The injectors are working fine.
Plug wires can't be swapped. Length.
It's getting spark and fuel is working but it seems like they aren't getting to each other. So I'm thinking timing but wouldn't it even try to fire. It doesn't even spark or sputter, like the fuel never meets the spark.

 

[etemplet]

If it is timing you'll generally get a backfire on occasion but it won't even try to run. If it runs after putting fuel in the intake I'd say your spark and timing are good so you have a fuel issue. I don't remember the other thread but did you check fuel pressure? Could be fuel quality also.

 

[NIL8er]

If it is timing you'll generally get a backfire on occasion but it won't even try to run. If it runs after putting fuel in the intake I'd say your spark and timing are good so you have a fuel issue. I don't remember the other thread but did you check fuel pressure? Could be fuel quality also.

The fuel pump is off a running ski so I'm sure pressure is good.
It's fairly new gas and it is what I put in intake.
Thanks for your time. Keep the suggestions coming. We'll get it

 

[etemplet]

You don't know the fuel pressure unless you check it. That is one of the most important issues. 56 PSI and the pressure regulator should hold pressure with the pump not running. I've had skis where the regulator didn't hold but it stil ran fine.

You have 2 filters in that canister for the fuel pump and I had a ski where the filters were very very bad and coming apart.. The pump nozzel can become disloged and cause a pump leak which will prevent pressure building up. I don't think many people replace the filters until after they have a problem so the filters in that ski could be 20 years old. Anyway... good luck.

 

[NIL8er]

You don't know the fuel pressure unless you check it. That is one of the most important issues. 56 PSI and the pressure regulator should hold pressure with the pump not running. I've had skis where the regulator didn't hold but it stil ran fine.

You have 2 filters in that canister for the fuel pump and I had a ski where the filters were very very bad and coming apart.. The pump nozzel can become disloged and cause a pump leak which will prevent pressure building up. I don't think many people replace the filters until after they have a problem so the filters in that ski could be 20 years old. Anyway... good luck.

Thanks. As I said The fuel pump worked a few days ago on another ski so I'm sure it's working

 

[Poormanracing]

Did you have the rotary valve off by chance is rotary valve spinning.if injectors are working and spraying you might not be pulling air.and not pulling fuel thru the transfers.just a thought

 

[Poormanracing]

I read it again and see new crank so is your rotary valve timed correctly.did you In stall the rotary valve shaft with a new gear and seal and mess up the brass gear?

 

[NIL8er]

Thanks for all the responses. After tearing 2 skis down and swapping all electronics starter, fuel injectors, double checking rotary valve timing, double checking piston orientation. Ultimately it was water in gas. New gas but one way valve in can let water in canister I'm guessing while in truck . Running now.