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S80 2.5t zavolii aftermarket issues ... Opinions please?

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Old Apr 9th, 2017, 23:16   #1
ijmorrison
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Last Online: Mar 8th, 2024 23:58
Join Date: May 2013
Location: Great Yarmouth
Default S80 2.5t zavolii aftermarket issues ... Opinions please?

Hi all ,

Picked up up a 53 plate s80 2.5t few weeks ago with a zavolii log system in. Very neat install done in 2009 all registered.

After a bit of a learning curve (so that's what the rubber guard on the pump stops! Ouch cold!) I've been left with a bit of an issue ... After 30 to 40 miles i get an engine warning light with an ecm 261a error ... Upper fuel limit reached .

I've replaced the spark plugs (genuine oe), all five coil packs (Delphi units), full oil change, fuel filter, air filter and oil pressure sensor (unrelated but nearly gave me heart attack) and a full coolant flush.

I'm still getting the error flag up ... If i run on petrol long enough to it will clear or if I reset it. Checked fuel trims and it seems ok on idle however on 1500 to 2800 no load my short term trim goes to 1.25 quickly and the long term limits climbs rapidly too.

Equally it is hard to hold a steady 2500 rpm as it tries to accelerate due to fuel trims . Can hold it steady on petrol.

Measured the maf and on idle (650) is around 10 to 10.5 kg/hour.

Reducer pressure is running at 1.37 bar spec is 1.4. no lpg ECU codes logged.

Next plan of attack is to replace maf as this seems low to me. Also thinking the s80 will default to readings from map sensor ... The LPG one has its own map so may not do this?

After that thinking of purchasing another reducer (new) to swap out ... On testing it was reporting the coolant temp was widely jumping from 90 to 100 however car was steady at correct level. Likely temp unit is shot in there.

Also thinking maybe diaphragm maybe going? Can rebuild old one later!

I am loathe to just alter the LPG map as it may be covering a fault (though this is likely the third step!)

Sorry for the miniature essay ! Any input gratefully received

Iain

Ps first lpg car i have owned !
Post no low pressure gas filter and liquid filter was advised was ok ... Will change myself if i order reducer and add low pressure filter.
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S70 T5 1999 (now written off grrr)
S80 2.5T LPG 2004
XC90 D5 2005 (2006)
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