Hey all, been lurking here but decided to register today as I am currently getting my butt handed to me by a 95 GTX.
Been sitting for a few years, luckily inside. So the tasks I did were fuel lines, removed and cleaned the tank, it wasn't bad, just a little stale fuel but not terrible. Rebuilt the carbs and cleaned the fuel selector. The jets in the carbs are stock and the pop off is 26 on both.Settings are 1 1/4 LS and 1/4 HS. Replaced the 3/32 oil lines.
So initially it started great on the trailer, didn't run it but a little bit. Lots of smoke, presumably from oil weeping into the crankcase while sitting.Took it to the lake and left it on the trailer, started right up, still smoking but cleared up in a few minutes. Had fuel leaking from the fuel pump sides of them so I took it back home. Made sure the flanges were flat on the pump housing and the other carb, took a little sanding to get them so. Put them back together and all was fine. Put in the lake and went for a ride. Ran alright, kind of hesitant on accel but if you nursed it you could get it past that and it ran well at speed. Really I was surprised at how quick it was. The wife has an 02 with the 951 and this one is at least as quick, power to weight I suppose.
Anyway, I fiddled with the adjustments a bit and didn't make any real progress, I could make it worse but not much better. So Back out and home. Plugs were fairly crappy looking so I got a new set of NGKs and went and filled the tank completely. Went out this morning and had kind of the same thing, I wanted to make sure it was warm so I ran it about 10 minutes then stopped to make an adjustment. I did that a couple times and never made any real progress. Still wasn't wanting to accelerate cleanly, if you hurried it, it would hesitate but if you backed off a bit, it would pick up and go well. It ran better at 7/8 throttle than it did at WOT.I wanted to make one more adjustment then do a WOT plug read. It never started again after I shut it off to make that adjustment. Seemed to not be getting any fuel.Plugs were dry but it just spun and grumbled a tad.
Got towed back to the dock thinking quick fix. Took the carbs off and after checking everything again, spraying through all the passages etc, wanting to make sure that wasn't part of the WOT problem. I found a bizarre thing. The disk check valve for the inlet side of the pump looked like it had been hit with a punch at the edge. I can't imagine how it got like that as I replaced them during the rebuild. Also it pumped and ran pretty good so I dunno. I installed another disk knowing it was healed.
Put the carbs back on, ski still in the water, and nothing. I took them back off and checked the pump by the suggestions here, check valves all worked and the diaphragm held pressure, I could even get it to pull a vacuum on the inlet by sucking and releasing the pulse port. Nothing wrong there so I put them back on. Nothing, now I took some spray cleaner, acetone based, and sprayed in the carbs, still only a little grumble from the engine, never really tries to start. I tried disconnecting the wire from the MPEM, black with red tracer, and no change. I couldn't really tell if there was a spark when I checked but when I touch it there is some current there, not earth shattering but a kick. Checked every connection I could touch but nothing stood out, one of them at the front, that go to the dash was kind of suspect but other than that all looked good.
The battery is new as of last week. It is charging overnight cause it had a hard day.
So my question isn't what is wrong, but more like, where should I start with the diagnosis. I could have a restriction in the selector valve but that doesn't explain why it doesn't start with a squirt in the carb. I was later told the ski has had the hesitation issue previously, before sitting. That is secondary at the moment unless the problems are related, ignition related??????
I'm open to a direction. I do have the FSM but when it comes to the ignition it's not much use.
Been sitting for a few years, luckily inside. So the tasks I did were fuel lines, removed and cleaned the tank, it wasn't bad, just a little stale fuel but not terrible. Rebuilt the carbs and cleaned the fuel selector. The jets in the carbs are stock and the pop off is 26 on both.Settings are 1 1/4 LS and 1/4 HS. Replaced the 3/32 oil lines.
So initially it started great on the trailer, didn't run it but a little bit. Lots of smoke, presumably from oil weeping into the crankcase while sitting.Took it to the lake and left it on the trailer, started right up, still smoking but cleared up in a few minutes. Had fuel leaking from the fuel pump sides of them so I took it back home. Made sure the flanges were flat on the pump housing and the other carb, took a little sanding to get them so. Put them back together and all was fine. Put in the lake and went for a ride. Ran alright, kind of hesitant on accel but if you nursed it you could get it past that and it ran well at speed. Really I was surprised at how quick it was. The wife has an 02 with the 951 and this one is at least as quick, power to weight I suppose.
Anyway, I fiddled with the adjustments a bit and didn't make any real progress, I could make it worse but not much better. So Back out and home. Plugs were fairly crappy looking so I got a new set of NGKs and went and filled the tank completely. Went out this morning and had kind of the same thing, I wanted to make sure it was warm so I ran it about 10 minutes then stopped to make an adjustment. I did that a couple times and never made any real progress. Still wasn't wanting to accelerate cleanly, if you hurried it, it would hesitate but if you backed off a bit, it would pick up and go well. It ran better at 7/8 throttle than it did at WOT.I wanted to make one more adjustment then do a WOT plug read. It never started again after I shut it off to make that adjustment. Seemed to not be getting any fuel.Plugs were dry but it just spun and grumbled a tad.
Got towed back to the dock thinking quick fix. Took the carbs off and after checking everything again, spraying through all the passages etc, wanting to make sure that wasn't part of the WOT problem. I found a bizarre thing. The disk check valve for the inlet side of the pump looked like it had been hit with a punch at the edge. I can't imagine how it got like that as I replaced them during the rebuild. Also it pumped and ran pretty good so I dunno. I installed another disk knowing it was healed.
Put the carbs back on, ski still in the water, and nothing. I took them back off and checked the pump by the suggestions here, check valves all worked and the diaphragm held pressure, I could even get it to pull a vacuum on the inlet by sucking and releasing the pulse port. Nothing wrong there so I put them back on. Nothing, now I took some spray cleaner, acetone based, and sprayed in the carbs, still only a little grumble from the engine, never really tries to start. I tried disconnecting the wire from the MPEM, black with red tracer, and no change. I couldn't really tell if there was a spark when I checked but when I touch it there is some current there, not earth shattering but a kick. Checked every connection I could touch but nothing stood out, one of them at the front, that go to the dash was kind of suspect but other than that all looked good.
The battery is new as of last week. It is charging overnight cause it had a hard day.
So my question isn't what is wrong, but more like, where should I start with the diagnosis. I could have a restriction in the selector valve but that doesn't explain why it doesn't start with a squirt in the carb. I was later told the ski has had the hesitation issue previously, before sitting. That is secondary at the moment unless the problems are related, ignition related??????
I'm open to a direction. I do have the FSM but when it comes to the ignition it's not much use.
