I copied this from an old post but here is my problem and all of the things I have done. Good fuel, air pressure.
Hi guys! Im new to this site and this is my first thread, if being a premium member will help me diagnose better i will sign up in a heart beat! ok, this is my issue: 03 RXDI. It doesnt get up to over 8 miles a hour in the water. The plugs are telling me something.. The mag cylinder seems to be making all the power. Heres a list of everything ive checked out, and changed. First off- the pto cyl, plug is coming out very black everytime. Black! Not tan, or even close. The mag cyl plug is coming out white! not even tan but looks like brand new white. it will rev out to 7000 rpms out of the water. When you put it in the water it wont rev over about 3200. It seems the mag cyl is the only one making power off idle. If, while i am running it in the water and pull the pto cyl plug wire the mag cyl will keep the engine running at idle by itself. Then if i do just the opposite with the pto cly..it sort of sputters then stalls out, and wont keep the engine running by itself. Also, with just the rear cyl plug wire hooked up out of the water on the trailor (pto cyl) it will barly idle, touch the throttle and it doesn die, but will NOT gain any rpms at all. chokes out... Do exactly the same thing but with the mag cyl while the rear is disconnected from the plug wire. It will gain rpms slowly... But it will rev on just the lead cyl. Ehhhhh im suprised i Havnt pulled all my hair out yet. And i have spent a few hours reading threads and posts of other people with the same ski, similar problems. here is a list of things i have checked out. i have tested the comp, both cyl are exactly the same at about 125psi. I have replaced the fuel pressure regular. I have checked both the fuel pump pressure AND i installed a t in the air line with clamps and a air pressure gage in line, thats pumping about 78-80 psi according to my gage. Drained all the fuel and put new fuel in, 92 oct. Also, we have the exact same year and model also of another ski... So i didnt want to waste more money so i took the air pressure reg out of the other one and put it in this ski to test it... None of anything i mentioned above has made a difference. (note: the other ski is running great) so i got frustrated and then swapped out the entire fuel rail with everything on it still, with the good running ski. Still have the same problem... Rear cylinder dies out off idle after everything i just mentioned. Am i doomed!?? please help me i so so much appreciate it
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Hi guys! Im new to this site and this is my first thread, if being a premium member will help me diagnose better i will sign up in a heart beat! ok, this is my issue: 03 RXDI. It doesnt get up to over 8 miles a hour in the water. The plugs are telling me something.. The mag cylinder seems to be making all the power. Heres a list of everything ive checked out, and changed. First off- the pto cyl, plug is coming out very black everytime. Black! Not tan, or even close. The mag cyl plug is coming out white! not even tan but looks like brand new white. it will rev out to 7000 rpms out of the water. When you put it in the water it wont rev over about 3200. It seems the mag cyl is the only one making power off idle. If, while i am running it in the water and pull the pto cyl plug wire the mag cyl will keep the engine running at idle by itself. Then if i do just the opposite with the pto cly..it sort of sputters then stalls out, and wont keep the engine running by itself. Also, with just the rear cyl plug wire hooked up out of the water on the trailor (pto cyl) it will barly idle, touch the throttle and it doesn die, but will NOT gain any rpms at all. chokes out... Do exactly the same thing but with the mag cyl while the rear is disconnected from the plug wire. It will gain rpms slowly... But it will rev on just the lead cyl. Ehhhhh im suprised i Havnt pulled all my hair out yet. And i have spent a few hours reading threads and posts of other people with the same ski, similar problems. here is a list of things i have checked out. i have tested the comp, both cyl are exactly the same at about 125psi. I have replaced the fuel pressure regular. I have checked both the fuel pump pressure AND i installed a t in the air line with clamps and a air pressure gage in line, thats pumping about 78-80 psi according to my gage. Drained all the fuel and put new fuel in, 92 oct. Also, we have the exact same year and model also of another ski... So i didnt want to waste more money so i took the air pressure reg out of the other one and put it in this ski to test it... None of anything i mentioned above has made a difference. (note: the other ski is running great) so i got frustrated and then swapped out the entire fuel rail with everything on it still, with the good running ski. Still have the same problem... Rear cylinder dies out off idle after everything i just mentioned. Am i doomed!?? please help me i so so much appreciate it
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