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View Full Version : Nova xe poorly, need a diagnosis dr PNG!


Mboasty
12-01-10, 05:29 PM
symptoms are misfiring badly on exhaust note (sounds like a scooby)
loss of power
struggles to tick over
low compression on all 4 cylinders 1-3bar
not over heating
timing is fine

this all happend suddenly while out giving it a bit!

any idea's

cheers

matt
Tommy_nova
12-01-10, 05:32 PM
you get my pm dude ?
philip
12-01-10, 06:46 PM
if heads had mega amounts took off, could be a chance the valves has touched the pistons and may be slightly bent now, especially if over revved it!
Paul
12-01-10, 10:22 PM
sounds like valve damage to me, but be suprised all of them have poor compression. how did you do the compression test?
Will F
13-01-10, 10:41 AM
If it was low on all four it wouldnt run!

Are they all the same readings?...

cambelt probably slipped, but like Paul said, it would only probably damage 2 cylinders...
Mboasty
13-01-10, 04:43 PM
i cant find the bit of paper that wrote the readings on, but they were all about 1-3 bar, dropped a teaspoon of oil down each cylinder & done test again, with no vast improvment, i will have to find the bit of paper. Ive checked the timing & it's all fine.
the engine start's & run's just misfiring badly & struggles to tick over rev's go up & down like it's going to stall then pick up.
there's no smoke from exhaust
Sloth
13-01-10, 05:17 PM
get the belt cover off and check your timing, then whip your head off if the timings ok.
Paul
13-01-10, 05:32 PM
Did you have W.O.T. when you done the test?
Mboasty
13-01-10, 08:13 PM
Did you have W.O.T. when you done the test?

:confused:
MattBrown
13-01-10, 08:19 PM
WIDE OPEN THROTTLE isnt it?
Paul
13-01-10, 10:57 PM
WIDE OPEN THROTTLE isnt it?
Yep
Mboasty
13-01-10, 11:28 PM
oh right, yes, i conducted the test as per the haynes manual so yes the throttle was open.
scott.parker
14-01-10, 12:04 AM
Humm they only time ran like that was when i bent most the exhaust valves, so lets hope it's not that.