Fuel pump not priming??
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Fuel pump not priming??
I have been told that when you turn the key just before starting the car you should hear the fuel pump prime the system.
Anyone know why i my fuel pump does not prime??
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second does it run properly once it has started or do you have problems while it is running
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if this is faulty may not be your pump at all
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It will be either your Cold Start Valve of Warm Up Regulator. Do searches on here - loads of info.
I would say from your symptoms it's the WUR - but you do the seacrh and then do the checks.
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Good luck
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vid clip of my mk1 staring from cold ( its being sitting a couple of days ) starts on the button & you can here the pump prime , no throttle
baz
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But when i bought the car the pump didnt prime & the Cold-start-valve was also faulty , but the car still started no bother after about 4 turns.
How many turns of the starter are we talking roughly ?
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If the WUR is not allowing the metering head pin drop smoothly to the correct enrichment point for starting then it will take several turns to get it going.
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cracyquiff sells relays , thats were i got mine & it primes , But your still not letting us know much turning over the motor takes to start when cold ?
baz
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99.9% its a dodgy relay
The cabs do have a lifter pump in the tank but the main fuel pump still needs to prime
You say pumping the pedal gets it started which shows the pump is ok otherwise the engine would not run as the fuel pressure is really crucial on these engines
use the search on here for fuse/relay box and youll find an excellent description of all relays
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Fuze box wiring layout . Relay locations . Fuze locations
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the only reason i knew that it should prime is a friend of mine's golf does it. and starts on the button.
i'll let you know if i solve the problem today..
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