gp1300r throttle position sensor bad?

[tom21]

I'll try to summerize. 02/2003 gp1300r, cust. had it maybe 8 mo. Tied to dock. Tide came in=ski sank. not completely but maybe 1/2 or more nose down..once out tried to blow air into cyl with plugs out and aluminim tip of air blower fell into cyl. now he is f'd.. now I get to deal with it, got tip out and blew rest of water out of intake and engine (not good, I know!) So I tell him get some money together it needs a crank, he's no way, im yes way, he says just run it and if its good :) if not rebuild. well the result of that was now it needed a piston/cylinder and the crank. fast forward a year and all the parts are finally purchased, ski rebuilt, running with no codes on the display. but if you try to give it the least little bit of throttle there if a big dead spot. any part or more than idle just winds up but you cant get a steady rpm at any place but idle. it just misses.

At first I thought the crank was the culprit, but now im wondering if maybe some salt water may have affected the injectors and or the TPS. The oil injector lines were never removed, but I did bleed them just incase. The fuel is not great but wouldn't that affect the idle too. it just seems like the injectors may be spraying irregularly or dribbling and the shooting open trying to adjust to the right spot and not gettin it.

The compression is 125 on all 3. and I tried to find an intake leak with MAP gas and i also tried with carb spray (carefully- that exhaust is close)

Any ideas? your help is greatly appreciated.

[tom21]

Re: gp1300r throttle position sensor bad?

hey whats up with the time? its 4 hours fast. You're still in Clearwater drinking coke, right? duh never mind I see now. Sorry

[anapg77]

Re: gp1300r throttle position sensor bad?

Backprobe with some pins and check it.

1 wire is a signal reference, normally about 5 V, 1 wire is a ground and the last wire is the signal return. (not always in this order)
May have a 4th for a closed throttle switch.

[tom21]

Re: gp1300r throttle position sensor bad?

sometimes worrying about everything being 100% perfect bites you in the butt. apparantly fuel injected skis don't respond well to being run with no load. Once I put the ski in the water and rode it I realized the throttle response was just dandy. and when I got back and flushed it same thing idle or blip the throttle anything else and it does not work well. Very different from carbed.

So just for the future record, F.I. skis have a wacky throttle response on the trailer. Totally fine in the water.

Thanks for the crankshaft SBT! Why don't you offer a rebuilt engine for the gp 1300r?

[Technical Support]

Re: gp1300r throttle position sensor bad?

Because they have already junked the first itteration of it, and neither version sold well compared to the older 2 stroke models. There isn't enough market demand to offset the considerable development costs, not to mention we would have years worth of stock to pay taxes on, just from our initial batch runs.