Well my DI is running on one cylinder. New fuel pump. Compression in both cylinders is 148. I've made sure that I've got spark. Trimmed spark plug wire. Swapped spark plug wires, swapped wires on the Fuel Injectors. Changed the Fuel Injectors and Director Injectors and still the front cylinder is not firing. My next thought is to swap the wires on the Director Injectors and if that's not it, swap out the fuel rail. Any other ideas that I can do before I take it to an "expert"?
-
This site contains eBay affiliate links for which Sea-Doo Forum may be compensated.
2001 GTX DI, Running on one cylinder What to do next
- Thread starter Cossack
- Start date
- Status
Dr Honda
Well-Known Member
You can't swap the wires on the actual injector. If you do... it won't start, since it will be spraying fuel when the piston is at the bottom.
Before we go too deep.... you do realized that a Di engien only idles on one cyl... right?? Have you tried to put it in the water, and put a load on the engine? (and rev it up)
If yes......
OK.... so... you swapped enough parts, so the parts should be OK. I'm going to guess, and say you have broken reeds in the dead cyl. Pull the throttle body, and get a look.
Before we go too deep.... you do realized that a Di engien only idles on one cyl... right?? Have you tried to put it in the water, and put a load on the engine? (and rev it up)
If yes......
OK.... so... you swapped enough parts, so the parts should be OK. I'm going to guess, and say you have broken reeds in the dead cyl. Pull the throttle body, and get a look.
This is why I love this forum. No, I did not know that it idles on only one cylinder. I assumed that since I was told by an "expert" that he thought it was only running on one cylinder when it wouldn't go over 4500 RPM in the water that that was the problem since it was only running on one on the trailer. I haven't tried it on the water since replacing the Fuel and Direct Injectors. Should I try it on the water first since I don't know if it really running on one cylinder or not?
Thanks again Dr. Honda for all your advice on the forum.
Thanks again Dr. Honda for all your advice on the forum.
SabrToothSqrl
Well-Known Member
I'd toss it in the water, worth a shot.
I'll check to make sure the battery is fully charged before I hit the lake. Here are a couple of pictures of the injectors that I took out. The injection shop called today and said that one was completely clogged. One of the Direct Injectors was clogged as well. I've replace both the injectors and the direct injectors, thanks Jess @ Minnesota PWC for hooking me up with some good used ones, and hope that this was the biggest issue. If not I'll take Dr. Honda's advice and check out the Reeds. If the Reeds are damaged, they can't do any damage to the rest of the engine can they?
SabrToothSqrl
Well-Known Member
head pipe? is this a 951 or 787?
on the 951 you can get to the reeds without removing the pipe, or at least on the carb you can.
on the 951 you can get to the reeds without removing the pipe, or at least on the carb you can.
After further inspection it does appear that one of the end sections of the Reed is weak. Not broken but not holding a good seal like the rest. So I'm going to go ahead and replace them since I've already gotten it broken down. Don't know if this would cause enough of a leak to cause it to run this poorly or not.
Dr Honda
Well-Known Member
I've seen them start and run with part of petal missing. (but not well)
The thing that I'm worried about is all the junk on the backing plate. Is it rust? Is it loose? If it's rust.... and couple that to the rust I'm seeing on the tip of the injector... and I'm going to say that the internals of that engine are rotten.
Has the compression been checked?
The thing that I'm worried about is all the junk on the backing plate. Is it rust? Is it loose? If it's rust.... and couple that to the rust I'm seeing on the tip of the injector... and I'm going to say that the internals of that engine are rotten.
Has the compression been checked?
It's not rust, it cleans off pretty easily. The compression was checked when I first started having problems, 148 in each cylinder. I'm going to put it back together with the week REED in the other cylinder and see if that moves the problem. I'll recheck the compression once I have it back together. Which brings me to a question that came to mind. If a REED is leaking, would that affect the compression since it would be releasing some of the pressure?
Im really doubting that would affect it to such a degree.
I hate to say it...but in my experience it seems that when you throw a bunch of stuff at it (looks like it needed injectors regardless) and nothing helps its time to start thinking MPEM.
I've got one I will "loan"...pay for it, plug it in and try it. If it doesnt fix it send it right back for a refund minus shipping.
One other thing Im not sure was mentioned...RFIs and DIs cannot have a drop of water in the gas tank.
I hate to say it...but in my experience it seems that when you throw a bunch of stuff at it (looks like it needed injectors regardless) and nothing helps its time to start thinking MPEM.
I've got one I will "loan"...pay for it, plug it in and try it. If it doesnt fix it send it right back for a refund minus shipping.
One other thing Im not sure was mentioned...RFIs and DIs cannot have a drop of water in the gas tank.
good work...one more variable to not worry about.
I have pretty much everything available for your machine minus the motor.
- Status
