Thread: not good
01-27-2012, 06:47 PM #1
spun my fzs round on the water 2 day and it cut out just like the landyard had come out tryed 2 restart and no go sounded like lack of compresion on a cylinder or 2 removed plugs and test compresion found no 1 zero psi no 2 75 psi no 3 75 psi no 4 zero psi timing chain ok and timing ok spin it over with cam cover off and all looks ok any ideas help please !!
01-27-2012, 07:07 PM #2
How did you do a compression test? Just wondering, since throttle by wire might skew things, since you need to do the test with the throttle blade wide open.
01-27-2012, 10:56 PM #3
01-27-2012, 11:19 PM #4
My guess is you will find something in the valve or ring areas that would cause your issue. The intake supplies all cylinders from the same air channel so I would look for water as a culprate on that side of things. The clutch also could alter air flow if the clutch fails, it restricts air flow but if that was the case then I would guess all cylinders might read low but they should all be close if that was the case but you have 2 that are very low and 2 that are non-existant in psi so the clutch may or may not be a factor.
01-27-2012, 11:36 PM #5
01-28-2012, 12:19 AM #6
01-28-2012, 07:20 AM #7
thanks all you guts i will post the fault soon going to pull the motor out asap !!!
01-28-2012, 08:11 AM #8
- Join Date
- Jan 2008
- Currituck, North Carolina, United States
so what MODS were on this ski......boost, intercooler? what was the conditions........thanks!
Little quick to pull the motor......do you know somthing we dont?
01-28-2012, 10:46 AM #9
He may not have to pull the engine as of now but if it were me I would do a quick check of the intake system for signs of water injestion and then pull the head at a minimum to see if something sticks out as abnormal. With 2 cylinders very low and 2 with no compression at all, there will hopefully be something pretty easy to spot as a prime suspect. I would definitely start with the head first and check all valves. Then inspect head gasket to see if it pushed out or burned up anywhere. Then inspect the bores to see if there is any damage to the wall. It sounds weird but with a limited description, all we have is a compression test to go by and he is across the pond so I am just trying to think of things that primarily affect that part of the testing to get him going in the right direction. I am very anal about my engines so if it were me, I would test using another guage to verify if it is the guage or the engine and then pull it out and tear it down to be sure there isn't something else going on in the process.
01-28-2012, 11:16 AM #10
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