My Ducati ST2 will not give more than 4000 RPM!

211 Views 4 Replies 4 Participants Last post by Shazaam!, 12 d ago

Kjell_Ducati_ST2

Discussion Starter · 14 d ago

Suddenly the Ducati will not work above 4-5000 rpm.
I have checked a lot, but still the engine will not run above 4-5000 rpm. Feel like it does not get gasoline.

I have done following:
-Checked all wire and connections -and spark plugs
-Open the tank and checked pump and filter (new)
-Measured the TPS (throttle control) and it gives 0,8v up to 4,8v at max opening as recommended.

ANY TIP ANYONE?
Regards -Kjell - 2097 - DUCATI ST2

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BOTT

· #2 · 14 d ago

Compression: Not it because it runs. But I'd still check for power loss against book running pressure numbers..
Spark: Not it because it can run up to full advance at 4k.
Fuel: Bingo... weak fuel pump pressure. Cannot meet demand.

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ur2close

· #3 · 12 d ago

Hi my ST2 2003 did something similar by revving up to 3,000rpm then dying, the fault was my reg/rec failing as it would show good volts at idle up to 3,000rpm then drop to 3volts. I have upgraded to a mosfett reg/rec and after a bit of grinding was able to refit it into the airtake where mine was originally fitted.

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