S14a wont start, Nats problem?

J

J Harris

Member
Apologies if this has been asked loads, been searching but couldn't find anything that would really help.
Yesterday I went to start my car to get to work and no go :(
drove the car home from work the night before with no problems, never had a problem with it not starting.
It turns over but just doesn't fire.

I have fuel (not checked its coming through the injectors yet)
put a new battery on, no difference,
checked the earths are all good and all connected.
Im thinking it may be something to do with the Immobiliser. When I turn the key to second I hear a couple of replays click but don't think I hear the fuel pump prime, the earths to the fuel pump also seem good.

any suggestions would be greatly appreciated
 
right, narrowed it down to the immobiliser or the fuel pump.
Ecu, fuel pump, battery earths all cleaned up.
All fuses checked for continuity and seem good,
fuel pump fuse good, fuel pump relay good

was told it had a new fuel pump by the previous owner before it got mapped last year
their also appears to be a live straight off the battery to a relay in the boot, will get some pictures up,

not sure whether to suspect a dead fuel pump or whether it is immobilised causing no power to the pump, opinions?
 
the red wire on the left is connected direct to the battery



to the black replay box on the right, is this a bypass of the immobiliser?

 
Overnight faults are never cool! You say the fuel pump relay is good, is there power coming out of it? Is there power at the pump? Obviously if there is no power to the pump then you need to go from there working backwards, if there is power getting to the plug at the sender then you need to pull the sender out and check a wire hasn't just fallen off/broken/pumps knackered.
 
fuel pump relay seems good, it clicks when ignition turned to second position, also taken it off and bench tested it for continuity.
when I turn the key to second position there is no power to the fuel pump connector.
when I turn it to third and it starts cranking over im getting 7-8 volts coming through, so some power is going to it when turning the engine over but I still don't hear the fuel pump prime
 
Pretty sure its my fuel pump which is kaput, fed a direct live and earth to the pump whilst it was still in the tank and nothing,
pulled it out of the tank and fed a direct live to the pump and nothing, gave it a few persuasive taps with a spanner and.... LIFE!
Is it common for fuel pumps to stick like this?
I think its best to purchase a new one as I don't want to risk putting a temperamental one back in,
anyone confirm if this is a Walbro 255LPH Uprated fuel pump? looks it to me....



 
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