Technical 2008 ducato 2.3 jtd misfiring

[johncop]

hi, i have a 2008 ducato 2.3 jtd with a strange problem... it start all right , idles fine, you can rev it up to 1500 rpm fine but when you get to 1500 starts missfireing and hesitating, once you have past 1500 rpm it runs fine again but brings a fault code p0335 rpm sensor witch i have changed without success, it also bring the temperature gauge on the dash up when its after 1500 rpm witch lead me to belive that its an ecu fault as it was doing the same thing even with the temperature sensor unpluged!

its got 260000 miles, i have checked the timing with is spot on, changed crank and cam sensors, ecu set (dash, ecu, and body computer), engine wiring loom, if anybody has any ideeas please let me know as i`m about to burn the f**ker down!
thnks

 

[cris1117]

Is it the same when the engine is hot?

 

[corcai]

How did you check the crank and cam sensors oscilloscope? Did you check the flywheel for damage / rust, regap the cam sensor, check for endfloat in the cam / crank.

 

[johncop]

Is it the same when the engine is hot?

Same no difference

 

[johncop]

How did you check the crank and cam sensors oscilloscope? Did you check the flywheel for damage / rust, regap the cam sensor, check for endfloat in the cam / crank.

I don't have an oscilloscope yet, have ordered one should have it by tomorrow , the crank sensor its on a phonic wheel witch its mounted on the crank itself , have taken the sump out and can't see any obvious damage.

 

[Timmosio]

Have you replaced the maf?

 

[johncop]

Have put a scope on the crank and I have this wave, I'm a newbie on scope but this to me looks like a bad wave witch tells me the my phoneic wheel is not how it's suppose to be!
What do you think

 

[CDK]

Looks like the wheel has 59 teeth, one tooth missing to indicate tdc.
The one larger excursion I cannot explain, possibly interference from another signal.

 

[corcai]

If its the same mess on every cycle then the phonic wheel is probably damaged ... by what though ... Was there anything in the sump. last time I saw one like that the engine had inhaled part of a blown turbo core and nicked a tooth on the wheel. Could just be the probe slipping if you just saw it once.

 

[johncop]

Manger to find the problem , found the original owner of the van and he took it to a garage to have the timing belt done and the front crank seal , and the idiot that done the job put the crank timing pin in and gun off the main pulley bolt and bent the phonic wheel as the pin goes through it ! See the pic of the wheel attached

 

[corcai]

Manger to find the problem , found the original owner of the van and he took it to a garage to have the timing belt done and the front crank seal , and the idiot that done the job put the crank timing pin in and gun off the main pulley bolt and bent the phonic wheel as the pin goes through it ! See the pic of the wheel attached

Well done. You did better than 3 main dealers did with the one I mentioned, they all changed the crank sensor knowing it had already been changed , and then changed random other parts like you took a couple of minutes with a scope for us to see the problem.

 

[Banjobob]

This was a good read

 

[dieselab]

hola, tengo un ducato 2.3 jtd 2008 con un problema extraño... arranca bien, ralentiza bien, puedes acelerar hasta 1500 rpm bien pero cuando llegas a 1500 comienza a fallar y vacilar, una vez que pasas las 1500 rpm funciona bien de nuevo pero trae un código de falla p0335 sensor de rpm que he cambiado sin éxito, también sube el indicador de temperatura en el tablero cuando está después de 1500 rpm lo que me hace creer que es una falla de ecu ya que estaba haciendo lo mismo cosa incluso con el sensor de temperatura desenchufado!

tiene 260 000 millas, verifiqué la sonorización con precisión, cambié los sensores del cigüeñal y la leva, el conjunto de ecus (tablero, ecu y computadora de la carrocería), el cableado del motor, si alguien tiene alguna idea, hágamelo saber como estoy ¡a punto de quemar al hijo de puta!
gracias

Hola buenas, disculpe yo tengo la misma falla, no sé si pudo arreglar la falla y no sé si puedo ayudarme es una Fiat Ducato 2009 2.3

 

[dieselab]

hola, tengo un ducato 2.3 jtd 2008 con un problema extraño... arranca bien, ralentiza bien, puedes acelerar hasta 1500 rpm bien pero cuando llegas a 1500 comienza a fallar y vacilar, una vez que pasas las 1500 rpm funciona bien de nuevo pero trae un código de falla p0335 sensor de rpm que he cambiado sin éxito, también sube el indicador de temperatura en el tablero cuando está después de 1500 rpm lo que me hace creer que es una falla de ecu ya que estaba haciendo lo mismo cosa incluso con el sensor de temperatura desenchufado!

tiene 260 000 millas, verifiqué la sincronización con precisión, cambié los sensores del cigüeñal y la leva, el conjunto de ecus (tablero, ecu y computadora de la carrocería), el cableado del motor, si alguien tiene alguna idea, hágamelo saber como estoy ¡a punto de quemar al hijo de puta!
gracias