03 gti le rfi

[Saigon]

Will not run when I put it in the water but will start on the hose fine . Compression, fuel,charging, is all checked and good . Any help in what to look for I got the stator cover off cause it backfired this last time I fire it up .

 

[1of500]

Check your rotary valve timing

 

[Saigon]

Check the clearance or ?

 

[mikidymac]

What’s the actual compression?

Too much rotary valve clearance will make it impossible to start in the water just like low compression.

 

[Saigon]

Compression is 155 on both I will check clearance what is it supposed to be ?

 

[etemplet]

Clearance spec is like .010" - .014". I've had engines with .018" start and run just fine.

 

[etemplet]

RFI. What's your fuel pressure? Needs to be 56-58 psi.

 

[Saigon]

Fuel was holding at 50 I've checked everything but the valve clearance it runs good on the hose that's what's getting me confused.

 

[KyleW2]

Fuel was holding at 50 I've checked everything but the valve clearance it runs good on the hose that's what's getting me confused.

Running good on the hose means absolutely nothing so don’t let that confuse you. There’s no load on the engine when it’s running on the hose, being in the water is the only true test. A shop near me actually has a water tank in their shop that they lift the ski into so they can test them under load.

 

[Saigon]

I'm gonna check the valve timing cause in the water it cranks good and wants to fire up but doesn't.

 

[etemplet]

Fuel was holding at 50 I've checked everything but the valve clearance it runs good on the hose that's what's getting me confused.

What is your peak fuel pressure? When you test the holding pressure you are looking at the regulator function. I had one that dropped off to 20psi in less than a minute and the ski still ran fine.

 

[etemplet]

Running good on the hose means absolutely nothing so don’t let that confuse you. There’s no load on the engine when it’s running on the hose, being in the water is the only true test. A shop near me actually has a water tank in their shop that they lift the ski into so they can test them under load.

I have considered a test tank as that would be a great thing to have. I read about a few of them, complaints people had and such. Everything could be safely tested right there, no hooking up hoses, worring about runaways, good cooling water tests, water seal stays cool. It's a win all the way around.

I could do it on my property easy. Get an old 18' center console boat. Cut off the console and bury it. Viola !! You now have a cajun water test facility.

 

[Saigon]

Fuel was around 55 while running