DC5 Engine Start Issue

[Norm]

Quick question DC5 owners. Should we be hearing our fuel line "priming"? Reason I ask is ever since i've changed my fuel rail, if I don't drive my car for a few days and start it up it runs for like 5-8 seconds then dies. I have to start it like 1-2 times before its running properly. Wondering whether I have a relay issue.

[gunpoons]

Morning everybody. The forum has been very quiet lately.

I've noticed this to, besides the few s2000's the build threads are very quiet

Probably not related mate but since I rarely drive the dc5 again, I have noticed it takes a lot of cranking to start, like 5 to 10 seconds, not sure if it has a problem but it doesn't feel right when it doesn't kick straight over, even my buffalo buck starts straight away after a long break

[plAythiNG]

Quick question DC5 owners. Should we be hearing our fuel line "priming"? Reason I ask is ever since i've changed my fuel rail, if I don't drive my car for a few days and start it up it runs for like 5-8 seconds then dies. I have to start it like 1-2 times before its running properly. Wondering whether I have a relay issue.

i drive my car once a fortnight. Yes, I let it prime for 10 seconds, starts first time every time. fuel setup all stock oem

[PG_DC5]

Never had this issue, mine usually starts in less than 2 seconds ... Spark plugs?

[M@lew]

Hmm are you turning the key and igniting straight away? I usually let it prime anyway but never had my car die even after not driving it for a while.

[PG_DC5]

... I've never come across this "priming" idea. I thought modern cars were meant to be able to start from cold all the time and driven straight away?
Not being sarcastic, serious question.

[tinkerbell]

... I've never come across this "priming" idea. I thought modern cars were meant to be able to start from cold all the time and driven straight away?

yep.

but not if you MODIFY them...

see post #1 for the cause of the issue: new fuel rail = probably doesnt hold pressure like the old one, fuel pump needs to refil it to build enough injector pressure...

Norm - also make sure all the fuel rail seals are OK...

[sleepingperformance]

I would suspect that due to the higher volume of fuel held in the rail, as tinkerbell has said, it will take slightly longer to build and hold pressure.

I have a rule of thumb that you should always wait 3-5 seconds after turning the ignition on before cranking as It will allow your fuel system to fully pressurise and reduce the likelihood of hard starting

[tinkerbell]

i drive my car once a fortnight. Yes, I let it prime for 10 seconds, starts first time every time. fuel setup all stock oem

fuel pump activates for only 2 seconds btw

[sleepingperformance]

^ can be slightly longer if running higher fuel pressure

[tinkerbell]

i run 75psi and it still only primes for ~2 seconds... i think the ECU decides the time it applies power to the pump for?

maybe DC5 is different?