fuel press. test 04 330ci zhp convertible

whodaupp@yahoo.com · 12-29-2012, 10:05 PM

Should the fuel pump start running when ig. Switch is full on just before cranking the eng. over?. Also, is the place to test fuel press. that shraeder valve on the injector rail?.

jfoj · 12-29-2012, 10:19 PM

2nd link below in my signature has info you need.

WDE46 · 12-29-2012, 10:55 PM

The fuel pump will "prime" the rail when you turn the key to position 2 ("run"). You'll here the fuel hiss through the filter/pressure regulator below the driver's seat.

whodaupp@yahoo.com · 12-30-2012, 01:33 AM

A couple days ago the eng. starts missfiring during acceleration. Made it home (barely) sputtering whole way down to a crawl at times. Shut off for 30 seconds would run a bit better afterwards. There is 5v.at one of the fuel pump wires (at fuel pump) at all times. With ign. at run position there is no 12v. at pump. Checkd glove box and E box fuses good. How do i get to relays behind glovebox?,i want to swap wiper and pump relays. Can a bad MAF sensor or what else cause no v. at pump?. Thanks......Robert J. Nc. Ca.

12-29-2012, 10:05 PM	#1
whodaupp@yahoo.com Registered User Join Date: Dec 2012 Location: Nevada City Posts: 3 My Ride: 04 330ci conv. View My Garage	fuel press. test 04 330ci zhp convertible Should the fuel pump start running when ig. Switch is full on just before cranking the eng. over?. Also, is the place to test fuel press. that shraeder valve on the injector rail?.

12-29-2012, 10:19 PM	#2
jfoj Registered User Join Date: Nov 2009 Location: Fairfax, VA USA Posts: 5,183 My Ride: '06 330CiC, '03 M5 View My Garage	2nd link below in my signature has info you need. __________________ Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616 Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501 Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491 Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619 E46/E39 GM5 Door Lock Info - www.bmwgm5.com Lower hose fan switch O-ring - BMW #13621743299

12-30-2012, 01:33 AM	#4
whodaupp@yahoo.com Registered User Join Date: Dec 2012 Location: Nevada City Posts: 3 My Ride: 04 330ci conv. View My Garage	04' 330ci ZHP Convertible no power to fuel pump A couple days ago the eng. starts missfiring during acceleration. Made it home (barely) sputtering whole way down to a crawl at times. Shut off for 30 seconds would run a bit better afterwards. There is 5v.at one of the fuel pump wires (at fuel pump) at all times. With ign. at run position there is no 12v. at pump. Checkd glove box and E box fuses good. How do i get to relays behind glovebox?,i want to swap wiper and pump relays. Can a bad MAF sensor or what else cause no v. at pump?. Thanks......Robert J. Nc. Ca.

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12-29-2012, 10:55 PM	#3
WDE46 Weagle Weagle Join Date: Sep 2012 Location: Huntsville, AL Posts: 3,670 My Ride: 2004 330Ci OBM View My Garage	The fuel pump will "prime" the rail when you turn the key to position 2 ("run"). You'll here the fuel hiss through the filter/pressure regulator below the driver's seat.