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Cold Start

08r3308

By 08r3308,
in General Maintenance

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central coast person Proficient

central coast person

Posted
Posted

Cleaning the cold start regulator will do nothing as it is only a valve that opens and shuts. The disc is half open at 20 degrees celsius making the idle about 1400RPM, so when you start your car and its starts that second time if it idles high when cold and low when hot then the regulator is operating fine.

As for power FC, it could be running a tune that is able to handle a rich cold start and yes you cold have had a faulty ECU but i don't know why or how the ECU would be fine the 2nd start and reset hours after only when its cold. Then in summer this problem does not occur (well for me), that's how i figured out it was a leaky injector then i pulled the rail out and primed the pump and saw it drip. 08r3308 you should do this because your going to have to eliminate possibilities with so may different opinions.

SargeRX8 Grand Master

SargeRX8

Posted
Posted

I'm starting to get a VERY rich fuel smell which happens only for about 2 seconds when I start the car. Not when I prime, only start. Ive got brand new injectors seated in a fuel rail with all brand new seals and rings. There is no smell of fuel in the engine bay at all. I can smell it in the cabin for a couple of seconds. Fuel hoses are all tight and secure. I think I'm just running way too rich and some raw, unburnt fuel is making its way into the exhaust before being burnt. The power FC isn't giving me any starting issues.

I too can now suggest you check your injectors. Its not hard to do. Have someone keep priming your fuel pump and just have a smell around the engine pay. Its a PITA to yank out the fuel rail, and the smell of fuel is really strong so if it is leaky I'm sure you will smell it.

Your engine bay should NOT smell like fuel.

central coast person Proficient

central coast person

Posted
Posted

I'm starting to get a VERY rich fuel smell which happens only for about 2 seconds when I start the car. Not when I prime, only start. Ive got brand new injectors seated in a fuel rail with all brand new seals and rings. There is no smell of fuel in the engine bay at all. I can smell it in the cabin for a couple of seconds. Fuel hoses are all tight and secure. I think I'm just running way too rich and some raw, unburnt fuel is making its way into the exhaust before being burnt. The power FC isn't giving me any starting issues.

I too can now suggest you check your injectors. Its not hard to do. Have someone keep priming your fuel pump and just have a smell around the engine pay. Its a PITA to yank out the fuel rail, and the smell of fuel is really strong so if it is leaky I'm sure you will smell it.

Your engine bay should NOT smell like fuel.

When you go to fill up with petrol do you get that "PSSHH" sound when taking the cap off, also on hard right turns you will get a stronger than usual fuel smell ....... if so then its the fuel filler cap. Other than that there is a million and one things to try.

SargeRX8 Grand Master

SargeRX8

Posted
Posted

Do you really think if there was a leak that you won't be able to smell it? Fuel has one of the strongest smells and even a drop in your engine bay will be very distinct. Ive got my old fuel rail here which was pulled out of the car to fit in the new rail. Ive pulled out all the injectors and the rubber is still nice and supple and there are no cracks or tears.

I just think that if there was leaky fuel, you would smell it. Just loosen the rail where it sits, lift it up and them keep priming your fuel pump over and over and watch for leaks.

SargeRX8 Grand Master

SargeRX8

Posted
Posted (edited)

Yeah I was thinking about that... if its leaking it will be leaking into the piston causing the cylinder to flood and bog down. Why not let it die down as it does then rip out the spark plugs and look for wetness. Its MUCH easier to pull spark plugs than it is to pull the rail.

When you go to fill up with petrol do you get that "PSSHH" sound when taking the cap off, also on hard right turns you will get a stronger than usual fuel smell ....... if so then its the fuel filler cap. Other than that there is a million and one things to try.

My old car did and that. I just tried it out on this car(and I recall when I used to go fill up) it does not do the psssh sound. I don't think it ever has... I took the cap off my other skyline and chucked it onto this one. The car is warm so I'm gonna let it pressurize then remove it see if it makes a difference. Is the filler cap not going pssh a problem WITH the filler cap?

Edited by SargeRX8

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