s/w wont stay on!
hey guys i recently couldent start my car and found out it was just the fuel pump(well i thought) but since ive changed it it starts fine everytime ...... but sometimes when im driving it will die and ill have to pull over and start car again, starts fine everytime but this happens everytime i drive it on average bout every 2kms any help on what may need done or replaced???? thanks ..
Donating Member
May be your crank angle sensor - do a code check first: Checking error codes VR/VS (Revised)
"If anyone disagrees with anything I say, I am quite prepared not only to retract it, but also to deny under oath that I ever said it." --T. Lehrer
"The secret of success is sincerity. Once you can fake that you've got it made." -- Jean Giraudoux
Banned
Banned
Firstly, What Lights Come On When This Problem Happens... If Your Oil Light Flashes On & Off Sometimes...
Change Your Oil Pressure Switch - Next To Oil Filter.. It IS Tied With Your Fuel Pump..
Check Trouble Codes If Yellow Engine Light Is Flashing Or Solid..
Secondly, Check Your Fuses And Relays... If Your Wipers Stuff Up Sometimes, Check The Fuses Under Your Bonnet.. It Could Be A Loose Fuel Pump Fuse.. The Wiring IS Intertwined With Other Components... (Like The Oil Pressure Switch)
Thirdly, If It Doesn't Sputter Before It Dies On You & You Sometimes Get A Flat Battery Or Cuts When It Gets Hot.. Take Your Alternator Off & Check The Regulator.. (Should Be On Back/Top With Plug On From Harness) (Bushes Could Be Worn)..
Last edited by QuickVRII95; 07-09-2010 at 03:10 AM. Reason: Typo
operation HQ under way.
Originally Posted by QuickVRII95
oil pressure switch has nothing to do with the fuel pump. it is there for a back up if the main realy dies..........
thanks guys
thanks guy will try a few things tonight and will post back what happens. apreciate the reply once again thanks.
tried
hey guys , i tryd taken it fir a drive after i looked at alternator and plugs , wires ect and ran fine... but now it wont start at all it turn over fine but wont fire..any help on this would be awesome..
thanks
Donating Member
Run the codes as previously suggested - this will give you a clue. Checking error codes VR/VS (Revised)
"If anyone disagrees with anything I say, I am quite prepared not only to retract it, but also to deny under oath that I ever said it." --T. Lehrer
"The secret of success is sincerity. Once you can fake that you've got it made." -- Jean Giraudoux
Banned
Hrmm.. Do A Bit Of Research...
http://autorepair.about.com/library/faqs/bl526.htm
QuickVR95II 2010 Survivor
5 Miles 2 Go Champion!
you pretty much just burned yourself.
"the oil pressure switch does not, in itself, shut off the fuel pump. It sends a signal to the computer and if certain conditions are met, the computer will shut off the fuel pump."
as explained in other forums (i used to believe the same as you mate, that the oil pressure switch could stop the fuel pump from priming) the ECU will only cut power to the fuel pump IF it is getting no signal from BOTH the oil pressure switch and either the crank angle sensor OR (in a V8) the hall effect sensor (among other things).
Kiwiboy change your Crank angle sensor, they dont always throw error codes to the ECU when they fail, nor can they be reliably tested 100% of the time with the pouring cold water on it trick.
The hall of fame:
ಠ_ಠ
I dont think its there as a safety thing,Ive been told it is there for a backup for the ECU if it fails completely, (goes into limp home mode) and cant send power to the fuel pump relay.When the ECU cant send power to the fuel pump relay for whatever reason,the oil pressure switch takes over and powers the fuel pump once the oil pressure is above a certain pressure so the vehicle can still be driven...I always thought it was some safety thing also until I was told this.
hey guys ive checked the trouble Codes and got a 1 2 so there is no (computer) problem i am totally lost at this stage, as i have no idea how to change the crank angle sensor i think its mechanic time???
Donating Member
If it won't start then maybe it cannot log a fault code......I'd try changing the DFI module - there are plenty are on Ebay. Question: does the red flashing immobiliser light under the radio go out when you turn ignition on?
"If anyone disagrees with anything I say, I am quite prepared not only to retract it, but also to deny under oath that I ever said it." --T. Lehrer
"The secret of success is sincerity. Once you can fake that you've got it made." -- Jean Giraudoux
operation HQ under way.
um bud i think i know a bit more than you im a quillifyed mechanic and with 8 years experance at a holden dealer ship i think i know what im talking about. grow up before you make stupid commintd before you jump to conclusions.
the oil pressure switch only powers up the fule pump if and when the ecm dies as a back up as stated. the dfi module powers up the fuel pump realy and also in a vr the fuel pump fuse powers up the bcm.
also with the flash codes it will only show when the foult is occuring so when the check engine light is on than you can check for the current code.
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