new memeber needs help

discussions specific to the 750 Paso

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ducapiero
Posts: 178
Joined: Mon Dec 11, 2006 12:00 am
model: 750 Paso
year: 1985
Location: Italy

new memeber needs help

Post by ducapiero »

Hi to everyone i'm Piero from italy i'm 22 and i buy the dke two years ago....i fitted with your articles mikuni and a the complete wiring upgrade....
but after this last modification the motorbike went with only one cilinder :sad: i made exams with the electronic tester and i noticed that negative impulse does not arrive to the coil of the cilinder,only the vertical has the two signals,i tried with the cdi units but both function...
i don'tknow what to do...
many thanks and i'm very sorry for my english :oops:
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ducapaso
paso grand pooh-bah
Posts: 1097
Joined: Sun Aug 01, 2004 12:00 am
model: 750 Paso
year: 1988
Location: siena, italy
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Post by ducapaso »

Ciao, Piero, da dove esattamente in Italia? (magari sei vicino a qualcuno che ti può dare una mano!)
Esattamente cosa intendi per "negative impulse"?
Comunque potrebbe essere un problema di cablaggio... I cablaggi originali del paso non sono il meglio in fatto di affidabilità! :ugh:
Prova a controllare la continuità dei singoli fili sui piedini tra le unità elettroniche e le bobine, potresti trovare il tuo problema!
Facci sapere
Last edited by ducapaso on Mon Dec 11, 2006 11:10 pm, edited 1 time in total.
have a nice ride, Nicola

Black "DUKE" 751582
ex...Red "smooth" 753349 :-(
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ducapaso
paso grand pooh-bah
Posts: 1097
Joined: Sun Aug 01, 2004 12:00 am
model: 750 Paso
year: 1988
Location: siena, italy
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Post by ducapaso »

Again in english...
Hi, piero, where exactly in italy? (you might happen to be very near to someone that can help you! :thumbup: )
What do you precisely mean with "negative impulse?"
However that might be a wiring trouble... Stock paso wiring weren't the best about quality! :ugh:
Try testing any single wire impedence upon the pins of the cdi and coils, you can find there your trouble!
let us know the updating
have a nice ride, Nicola

Black "DUKE" 751582
ex...Red "smooth" 753349 :-(
ducapiero
Posts: 178
Joined: Mon Dec 11, 2006 12:00 am
model: 750 Paso
year: 1985
Location: Italy

Post by ducapiero »

ah meno male in italiano :D complimenti per il tuo scarico e grazie per la risposta,mi spiego meglio:ho provato a far partire la moto dopo aver montato i carburatori mikuni e aver messo i due relays
e mi andava sempre ad un cilindro,ho smontato la pipetta della candela e ho visto che non c'era scintilla,ho messo il tester sui due cavi che dalla centralina arrivano alla bobina e ho visto che il segnale positivo arrivava il negativo no!solo che verificando col tester non è un problema di centraline ne di filo interrotto....
mi chiedevo se potevo prendere il negativo dall'altra bobina ma mi hanno sconsigliato di farlo e probabilmente hanno ragione :laugh: ...è una settimana che non so come risolvere l'ennesimo problema....
ducapiero
Posts: 178
Joined: Mon Dec 11, 2006 12:00 am
model: 750 Paso
year: 1985
Location: Italy

Post by ducapiero »

ah dimenticavo sono di Napoli :cool:
ducapiero
Posts: 178
Joined: Mon Dec 11, 2006 12:00 am
model: 750 Paso
year: 1985
Location: Italy

Post by ducapiero »

I'm from Naples :cool:
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persempre907
paso grand pooh-bah
Posts: 3312
Joined: Tue Dec 06, 2005 12:00 am
model: 907 I.E.
year: 1992
Location: Roma, Italia

Post by persempre907 »

E la bobina? Se hai controllato che i fili sono OK e anche la centralina va bene....
Facci sapere.
Sono di Napoli anch'io anche se vivo a Roma da anni.
Ai tempi, quando avevo qualcosa in disordine sul mio primo Paso 906 facevo un salto da Zasso, zona Piazza Amedeo, che era principalmente un meccanico Moto Guzzi ma riusciva a mettere le mani su tutto.
Ma stiamo parlando di dieci anni fa....

Ciao
Francesco
Ducati 907IE 1992 Rosso
Ducati 907IE 1993 Nero
Moto Guzzi Galletto 1960 Sabbia
BMW R Nine t 2019
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persempre907
paso grand pooh-bah
Posts: 3312
Joined: Tue Dec 06, 2005 12:00 am
model: 907 I.E.
year: 1992
Location: Roma, Italia

Post by persempre907 »

Have you checked the coil? If the wires are OK and also the ECU is working...
Let us know.
I'm from Neaples too, but I'm living in Rome from many years.
When I was in Naples, when I had some trouble on my first bike, a Paso 906, I used to go to Zasso, near P.zza Amedeo. He principally used to repair the Moto Guzzi, but he could fix all the bikes.
But, I'm talking about 10 years ago.
Ciao
Francesco
Ducati 907IE 1992 Rosso
Ducati 907IE 1993 Nero
Moto Guzzi Galletto 1960 Sabbia
BMW R Nine t 2019
ducapiero
Posts: 178
Joined: Mon Dec 11, 2006 12:00 am
model: 750 Paso
year: 1985
Location: Italy

Post by ducapiero »

quando accendo il contatto individuo i due fili che vanno sulla bobina del cilindro orizzontale e non passano 12 volt tra l'uno e altro e ho visto che il problema è del segnale negativo che non arriva...per quanto riguarda i meccanici son la mia crce ne avevo trovato uno ottimo ma è andato in pensione,sto cercando di ricontattarlo pare che lavori privatamente....
ducapiero
Posts: 178
Joined: Mon Dec 11, 2006 12:00 am
model: 750 Paso
year: 1985
Location: Italy

Post by ducapiero »

When i turn the keys on i saw that on the coil does not arrive both signals,the negative signals don't appears on the cable only the positive signals arrive...immake many test and i see that the negative cable is not stopped...i don't know what to do..
and for the rest is so hard to find a good mechanic my own ceased his activity for age,now i'm trying to contact him cause he's working for private...
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persempre907
paso grand pooh-bah
Posts: 3312
Joined: Tue Dec 06, 2005 12:00 am
model: 907 I.E.
year: 1992
Location: Roma, Italia

Post by persempre907 »

Quindi non arriva proprio corrente sulla bobina?
Però tu dicevi che la centralina funziona :confused: :confused: .
E il collegamento dalla centralina alla bobina, come d'altronde ha detto subito Nicola?
Ciao
Last edited by persempre907 on Tue Dec 12, 2006 1:59 pm, edited 1 time in total.
Francesco
Ducati 907IE 1992 Rosso
Ducati 907IE 1993 Nero
Moto Guzzi Galletto 1960 Sabbia
BMW R Nine t 2019
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persempre907
paso grand pooh-bah
Posts: 3312
Joined: Tue Dec 06, 2005 12:00 am
model: 907 I.E.
year: 1992
Location: Roma, Italia

Post by persempre907 »

So, the current don't come to the coil, but you said the ECU works well.
Have you checked the wire beetween the ECU and the coil, as Nicola told earlier?
Ciao
Francesco
Ducati 907IE 1992 Rosso
Ducati 907IE 1993 Nero
Moto Guzzi Galletto 1960 Sabbia
BMW R Nine t 2019
ducapiero
Posts: 178
Joined: Mon Dec 11, 2006 12:00 am
model: 750 Paso
year: 1985
Location: Italy

Post by ducapiero »

adesso col tester un'altra novitàil filo azzurro-giallo che va alla bobina dalla centralina mi da una polarità inversa,come se fosse positivo quando invece è negativo, :screwy: ,i fili dalla bobina alla centralina li ho tracciati col tester ,non sono interrotti,ho provato anche ha verificare il segnale che parte dalla centralina direttamente sul suo spinotto e anche qui mi inverte la polarità,
filo arancione-,filo azzurro-giallo +....
aiutatemi voi :sad:
ducapiero
Posts: 178
Joined: Mon Dec 11, 2006 12:00 am
model: 750 Paso
year: 1985
Location: Italy

Post by ducapiero »

some new news with the tester the blu-yellow feed that runs negative signals on coil had positve signals ,and with the tester on the ecu i saw that the signal is inverted orang feed is negative blu-yellow positive :sad:
help me...
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Desmo_Demon
paso grand pooh-bah
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model: 750 Paso
year: 1987
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Post by Desmo_Demon »

ducapiero wrote:some new news with the tester the blu-yellow feed that runs negative signals on coil had positve signals ,and with the tester on the ecu i saw that the signal is inverted orang feed is negative blu-yellow positive :sad:
help me...

If you have a positive charge on the orange wire with the working coil, you should have a positive charge on the other coil with that orange wire, too......as all of them are connected.

Disconnect the blue-yellow wire, and make sure that you have a positive charge on all orange wires. If not, you have a problem with a connection on these wires, somewhere. I'd disconnect the blue-yellow wire at the cdi unit by unplugging the connector, but then check it again with the cdi unit plugged in but the blue-yellow wire disconnected from the coil to see if there is a difference.

I don't know where to go from this point....yet.....but not having a positive charge on the one orange wire does not seem correct, so check that first.
2002 Ducati 748 monoposto
1998 Ducati ST2
1996 Suzuki GSXR-1100
1994 Bimota DB2
1988 MegaPaso 916 project
1987 Ducati Paso 750
1985 Harley FXEF
2001 Ducati M900ie (wife's)
2000 Yamaha YZF-R1 (wife's)
1998 Ducati ST2 (wife's)
1994 Suzuki GSX-750R (wife's)
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