Issues With Hot Start On Rb25det

[shaun77]

ok guys now i am having issues with the car when i hot start it, it floods like hell and takes ages to start when started cold its fine runs like a dream never misses a beat blows no smoke i just cant figure it out only runs shitty for about 20 secs then it levels out and runs fine again so i am a bit puzzeled as to wot it could be?? any ideas wot to check and look for would be great thanks

[R31Nismoid]

Just me thinking... could it be the thermostat or a water temp sensor?

Making the car think its in coldstart even when its warm?

Im not sure, im just thinking out aloud as i wouldnt mind knowing what would cause it either

[shaun77]

Just me thinking... could it be the thermostat or a water temp sensor?

Making the car think its in coldstart even when its warm?

Im not sure, im just thinking out aloud as i wouldnt mind knowing what would cause it either

yeh i might test my water temp sensor thermosat is fine temp is always good i will have to round another one up.....

[skylinecouple]

If you still have the standard fuel pump ignore me,but if it is a bigger pump it needs to be primed before starting.I have exactly the same problem since putting in a bosch 910 and injectors with PFC.If any body has an answer I`d like to hear it.

[R31Nismoid]

You problem coupe - would be the setup.

I had 740cc injectors, Bosch 040, PowerFC.

Start & idle was identical to factory.

You wouldnt know the difference

[skylinecouple]

So Nismoid,

Would that be set up of the fuel pump or PFC? I know there is a different pump speed at idle than at higher revs.

[R31Nismoid]

I'd say injectors setting possibly.

You'd be better off talking to your tuner, he will know what he has, and hass not changed in the way of settings for the injectors etc

[skylinecouple]

Thanks mate.

[paulr33]

what is your water temp when you have this problem?

you could try trimming the warm start cranking for 80deg water temp

or for whatever water temp you have problems with

[shaun77]

what is your water temp when you have this problem?

you could try trimming the warm start cranking for 80deg water temp

or for whatever water temp you have problems with

it usually only happens at 80deg at 40 it was fine but i have just tested my water temp sensor and it is reading at 0ohms hot or cold so i guess that is the proplem i will round up a new one tomorrow!

[paulr33]

if the water temp sensor is busted;

on the hand controller you have it highligted in black on the SENSOR SW CHECK screen under ETC

on the hand controller under monitor for water temp you will have ---

also the engine check light will remain on with a broken water temp sensor

[shaun77]

if the water temp sensor is busted;

on the hand controller you have it highligted in black on the SENSOR SW CHECK screen under ETC

on the hand controller under monitor for water temp you will have ---

also the engine check light will remain on with a broken water temp sensor

its in a vl calais so sort of dont have any of those lights but i am bloody trying to round one up ! they all seem to be taken of cars all ready so yeh appericate the help

[Cubes]

Shaun,

What value is under the cranking ms for 80degree's?

I have hot cranking issues if its any lower than ~8-9 where I must sit around and wait until coolant temps have dropped a little so that it begins scaling the prior degree value.

I doubt its flooding as I have wound mine right up and it never floods as such, chances are its not getting enough fuel from what you are saying.