Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > 998 / 996 / 916 / 748 > 748. misfire on tickover. advice needed please

[zhed44]

hi -

after riding for about 20 minutes the 748 started to go on and off one cylinder with much popping and banging every time i was stationary at lights etc. it was fine on the move though.

any ideas?

[madmav]

possible TPS

or just leaning off a little too much

or
crank angle sensor

or Air Leak on exhaust

popit in for a set up!

nelly?

bring it on !

[zhed44]

Originally posted by madmav
possible TPS

sorry to be thick, but what is TPS?

[i]or just leaning off a little too much

LOL. i wasn't leaning off at all.

seriously though - i did wash the bike the day before, so i'm wondering if it might be water ingress somewhere

[deej]

spark plugs, sound similair to a problem i had when running my 853 in

[weeksy2]

TPS, throttle position sensor.

[madmav]

zhed
Throttle position sensor
but to be fair it could be somthing as simple as the porcelain crcked or even a dirty spark plug! just check the obvious stuff first

mav

[rockhopper]

TPS equals throttle position sensor (about £130 for a new one). It tells the ecu how far open the throttle is.

I would have thought a problem with it would have affected both cylinders though.

An air leak or exhaust leak would be my first guess. Loose or dodgy spark plug perhaps?

[madmav]

[quote]Originally posted by zhed44

[i]

seriously though - i did wash the bike the day before, so i'm wondering if it might be water ingress somewhere

sounds mor like the problem
remove the plug caps and blow out with air!
they wont always dry out with heat as the water turns to condensation and causes the plugs to track out!!

[JPM]

Does the rev counter bounce around?

[madmav]

Originally posted by JPM
Does the rev counter bounce around?

Pmsl! we all know you'rs dont pass 4 thousand rpm