2004 Yamaha 225 throttle problems

[davidemo]

Hey Guys,
I've had nothing but problems since July trying to get the motor to throttle up. It just coughts, sputters and back fires when ever I try to hit the throttle. Idle's just fine. I've had the injectors cleaned, the fuel filters changed, and the throttle position sensor changed. NEED Help!
Thanks,
Davidemo

[mrv8outboard]

Did you set the tps with the software? It is a lean condition. Look for air leaks at the intake side of the engine? More details on your engines and set up would help.

[davidemo]

No, the mechanic only changed the tps after another one checked it out with the software. The engine is a 2004 225 4stroke. I'm done to finding guys on Craig's list because the first "authorized" yamaha marine center couldn't find the problem and just kept charging me.

[boats.net]

Synchronize throttle body and throttle linkage and then reset TPS. Check cam belt timing. Check compression to test condition of valves(do a leak down test if compression uneven). Have idle control valve tested.

[davidemo]

Thanks,
I plan on taking it to "another authorized" dealer. I've already have over a grand in these repairs.