TESTING FUEL PRESSURES PREPERATION 1/ Remove electrical terminal plug from the warm-up regulator. 2/ e-pre!!uri!e fuel !"!tem #" removing fuel rela" an$ cran% engine for &' !econ$!. (ITTIN) (ITTIN ) TE*T TE*T )A+)E - ,-etronic ,-etr onic 1/ Remove fitting from center of fuel $i!tri#utor an$ large fitting on warm-up regulator. 2/ In!tall gauge with the tap clo!e!t to the arm-up regulator. regulator. TE*TIN) 1/ ith a col$ engine or col$ warm-up regulator an$ the gauge tap open cran% engine or !tart engine an$ recor$ pre!!ure. Thi! i! the 0ol$ ontrol Pre!!ure. 2/ lo!e tap an$ recor$ pre!!ure. ith the tap clo!e$ "ou will recor$ the 0*"!tem pre!!ure. &/ Open the tap re-fit the arm-up Regulator electrical terminal !tart the engine an$ watch/recor$ the changing pre!!ure a! the engine warm! up. T"pical Control Pressure rea$ing!. Pressure rea$ing!. ol$ engine. 1' $egree! . . 1.& 3 1. 1.4 #a #ar 2' $egree! . 1.4 3 2.' #ar. &' $egree! . 2.' 3 2.5 #ar. arm engine. &.5 3 &.6 #ar. 7acuum 7acuum t"pe warm-up regulator with vacuum line $i!connecte$ an$ warm engine 2.6 3 &.2 #ar. T"pical System Pressure rea$ing. Pressure rea$ing. 5.6 3 8.5 8. 5 #ar.
FITTING TEST GAUGE – KE-Jetronic KE-Jetr onic Remove the #lan%ing plug! 912mm: from #oth the centre of the fuel $i!tri#utor an$ the #ottom half. In!tall the fuel pre!!ure gauge with the tap clo!e!t to the top half. ith the tap open "ou will get a !"!tem pre!!ure rea$ing. lo!e the tap an$ "ou will get the control pre!!ure! the lower cham#er pre!!ure!. The control pre!!ure varie! accor$ing to the current going to the E;A 9Electro;"$raulic Actuator: Actuator: which i! the !mall #lac% #o< !crewe$ to the !i$e of the (uel i!tri#utor.
)auge !et-up for ,E-etronic ,E-etronic !"!tem pre!!ure i! u!uall" aroun$ 8.8-4.' #ar. ;ere are !ome gui$e line lower cham#er pre!!ure! "ou coul$ e
ou nee$ to ma%e a wire connector to t o go from one terminal ter minal on the wiring plug to it?! connector on the E;A.
>our multimeter !witche$ to milliamp! 92'' !cale if "ou have that option:. 1 connector to the other terminal on the wiring plug an$ the other to the E;A. T"pical current at E;A in milliamp! 9mA: Ignition on= -1' to -2'mA ran%ing !tarter motor= -12'mA I$le warm engine= @/-8mA I$le col$ engine= -8 to -1'mA +n$er acceleration= -2'mA
!LU"E UN#ER PRESSURE Thi! te!t i! critical when chec%ing for lo!! of power. The fuel pump can give the reBuire$ pre!!ure! #ut #e ver" low on volume re!ulting in low power an$/or mi!fire!. Cocate the fuel return line. On ,-et fuel $i!tri#utor! there i! u!uall" a fle
Even chec% that "ou are getting 12volt! to the fuel pump an$ that the earth for the fuel pump i! goo$. Fut without 1litre in &' !econ$! $on?t procee$ until "ou have rectifie$ thi! fault. REFITTING FUEL #ISTRI$UT!RS #ISTRI$UT!RS hen refitting an e
− hec% that the roller on which the fuel $i!tri#utor centre pi!ton run! turn! freel". Allen %e" rece!! for mi
− hec% the air flap height an$ that the air flap i! not touching an" part of it?! venturi. Replace the O-ring on the #ottom of the fuel $i!tri#utor a! !upplie$. Folt the fuel $i!tri#utor onto the air flap an$ refit all the pipe! e
− If fuel i! ri!ing out of the inector line outlet port! rotate the mi
− If no fuel i! ri!ing out of the inector line outlet port! rotate the mi
anti-cloc%wi!e a further 18'. Thi! !houl$ give "ou a #a!ic !tarting !tart ing point for !etting the correct mi
Gi
"ISFIRES If "ou have a mi!fire an$ "ou?ve $etermine$ that it i! not electrical. (ir!tl" i$entif" which c"lin$er ha! the mi!fire= F" loo!ening either the inector ho!e/pipe at the fuel $i!tri#utor or at the inector 9whichever i! more convenient: the engine will either mi!fire wor!e in$icating that that c"lin$er i! o% or there will #e no change in how the engine i! running when the fitting i! loo!ene$. Thi! i! "our fault" c"lin$er. Neou >ou coul$ !wap a $ifferent inector from a goo$ c"lin$er to !ee if the fault !ta"! with the c"lin$er or i! now in the c"lin$er with the inector that wa! mi!firing previou!l". If the mi!fire move! it i! an inector fault. If the mi!! !ta"! with the c"lin$er it i! a fuel $i!tri#utor fault. uic% clean of inector= If "ou have acce!! to compre!!e$ air "ou can tr" thi!. Remove the inector an$ !pra" a $egrea!er into the inector an$ then force compre!!e$ air into the inector. >ou >ou onl" have a moment to !ee what happen!. The inector !houl$ have a nice !pra" an$ it !houl$ ?#uJJ?. Tr" !oa%ing the inector in $egrea!er an$ force compre!!e$ air through the inector to !ee if "ou get a goo$ !pra" an$ ?#uJJ?. If not replace the inector. If "ou are a#le to remove one of the inector line!/pipe/ho!e !crew it to the inector an$ fill with $egrea!er an$ force the compre!!e$ air $own the ho!e. Thi! will #ecau!e of the greater volume of flui$ give "ou a much #etter loo% at how the inector i! #ehaving. A mi!fire at higher rpm i! a #it more $ifficult to te!t for= >ou >ou nee$ to remove the inector! from the manifol$ an$ have them aim into !ome !ort of container. 1 for each inector. Fri$ge the fuel pump rela" an$ then lift/pre!! the air flap to full throttle. hec% how each inector i! !pra"ing an$ it?! volume. Fa$ inector! will #e ver" o#viou! #" their poor !pra" pattern an$ a lower volume of fuel $elivere$.
