Car won't start
Discussion
I had nice family trip planned in the Monaro this morning and the bloody thing won't start. Last week it came home from a service at Monkfish and was running fine but this morning it just cranks and cranks but won't catch. No smell of petrol and I cannot hear the pumps priming when I turn on the ignition, therefore I suspect something's amiss with the fuel system. I've just closed the garage door again and the bloody thing can stay there sulking.
It's never done this before, any ideas what to check/try before I call Mr AA man?
It's never done this before, any ideas what to check/try before I call Mr AA man?
Do you have a scan tool etc to see if you have communications with the ecu ?
That should let you know if the ecu itself is receiving power ok without getting your hands dirty
After that, you'll need to access wiring to the pump and check for power on key on, and during cranking.
If not, checking wiring, fuses, relays etc Presumably you are no longer using OEM relays and wiring so these should be easier to trace and check
That should let you know if the ecu itself is receiving power ok without getting your hands dirty
After that, you'll need to access wiring to the pump and check for power on key on, and during cranking.
If not, checking wiring, fuses, relays etc Presumably you are no longer using OEM relays and wiring so these should be easier to trace and check
wormus said:
No, but scan gauges are all working fine. Which relay/fuse should I look at? Is there a way to test?
You need to find the connector for the wiring to the pump, local to the pump and test there.If you arent getting power there, then you can look further. As said, I would highly doubt...certainly hope you are not using the OEM relays and wiring for your fuel pump. So best to test at the pump first, and then work back.
Is that the fuel pump fuse ?
With some of the modern pumps about, or dual pumps a blade style fuse like that isnt always ideal whether it's within the current range or not.
They just draw lots of current and small blades will melt if run close to max load for long periods.
Even around 2/3 max load I'd be wanting to upgrade to a larger fuse or fusible link type of thing.
Plus lots of replacement fuses you buy these days are made in china crap which is almost impossible to avoid.
If you search egay etc for "maxi fuse holder" etc they do larger versions of the normal blade fuse which will tolerate the current better.
With some of the modern pumps about, or dual pumps a blade style fuse like that isnt always ideal whether it's within the current range or not.
They just draw lots of current and small blades will melt if run close to max load for long periods.
Even around 2/3 max load I'd be wanting to upgrade to a larger fuse or fusible link type of thing.
Plus lots of replacement fuses you buy these days are made in china crap which is almost impossible to avoid.
If you search egay etc for "maxi fuse holder" etc they do larger versions of the normal blade fuse which will tolerate the current better.
Edited by stevieturbo on Monday 6th April 15:34
The fuse holder is in-line and the wire runs from the battery, towards the rear of the car. Looks suspiciously like the culprit.
I have twin pumps and a bit of Googling shows a 255 lph pump can draw up to 18 amps. It's a 20 amp fuse and looks more like it's melted than actually blown. I'll check with Roger but if my hunch is right, it hopefully just needs a beefier fuse/holder. Fingers crossed.
I have twin pumps and a bit of Googling shows a 255 lph pump can draw up to 18 amps. It's a 20 amp fuse and looks more like it's melted than actually blown. I'll check with Roger but if my hunch is right, it hopefully just needs a beefier fuse/holder. Fingers crossed.
wormus said:
The fuse holder is in-line and the wire runs from the battery, towards the rear of the car. Looks suspiciously like the culprit.
I have twin pumps and a bit of Googling shows a 255 lph pump can draw up to 18 amps. It's a 20 amp fuse and looks more like it's melted than actually blown. I'll check with Roger but if my hunch is right, it hopefully just needs a beefier fuse/holder. Fingers crossed.
255's arent as bad, but they can see 10-12A each. The bigger ones 340 and upwards can see as much as 20A each depending on pressure, the current they draw is insane.I have twin pumps and a bit of Googling shows a 255 lph pump can draw up to 18 amps. It's a 20 amp fuse and looks more like it's melted than actually blown. I'll check with Roger but if my hunch is right, it hopefully just needs a beefier fuse/holder. Fingers crossed.
My 044's draw around 22A normally, rising to about 26A at max pressure I'd use ( that's both pumps, not one ). Even this did hurt a 30A fuse slightly over time although it never got as bad as yours. You could just see it had been affected by heat
I try and use OEM fuses taken from factory cars whether scrap yard etc though. They will always be better quality than the chinese stuff.
But the standard blades just arent enough really. Switch it to a maxi blade and stick a 30A fuse in it if it is doing both pumps.
Cheap fix.
Edited by stevieturbo on Monday 6th April 16:20
Cheers Stevie. Just bought a new 100 amp maxi fuse holder and what I hope are some decent quality fuses: http://www.amazon.co.uk/dp/B000T6BH2A/ref=pe_38572...
wormus said:
Cheers Stevie. Just bought a new 100 amp maxi fuse holder and what I hope are some decent quality fuses: http://www.amazon.co.uk/dp/B000T6BH2A/ref=pe_38572...
The fact the holder etc is bigger and designed for more current, it should negate a lot of the quality issues simply as you arent pushing the connector near its limits.So it should be fine with the new setup
shunter V8 said:
Bad news Paul,cut out the fuse link and splice in some barbed wire,that will not melt.
. We are going to monkfish on Thursday for the annual check up.
I'm getting the bumper painted tomorrow and was thinking of jamming a paper clip in the holder so I can start and move the car, probably not a good idea though? . We are going to monkfish on Thursday for the annual check up.
By the way, I'm coming over for race week with Alex and the kids if you and Andrea fancy meeting up?
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