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Start up problem no one can solve...
Start up problem no one can solve...
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Old 04-18-17, 05:13 PM   #21
yamahaSHO
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Default Re: Start up problem no one can solve...

I run 85% ethanol and have never seen anything but clean injectors.
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Old 04-18-17, 05:59 PM   #22
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Default Re: Start up problem no one can solve...

Quote:
Originally Posted by yamahaSHO View Post
I run 85% ethanol and have never seen anything but clean injectors.
Same here.

This looks like contaminated fuel...

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Old 04-19-17, 04:26 AM   #23
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Default Re: Start up problem no one can solve...

I would find new shops,

I think it was clear to most that it was some type of fuel problem here, including myself when i first read it. Remember, you need fuel, spark and air to run, and since you getting air we can call it compression then.

Start simple and it usually ends with a simple fix. Im glad you got it taken care of.
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Old 05-24-17, 09:04 PM   #24
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Default Re: Start up problem no one can solve...

[QUOTE=inpuressa;4284254]I have an issue with my 08 STI where the dealer, and 2 shops could not figure out.
It is a startup issue where the car would take about 5 sec(or longer) of cranking to start up.

Here are some things to note:
1. Car needs to be parked for at least 15-20min for the hard start to come in.
2. Car will start up fast like normal if it is within say a few min. (eg. start up from a stall or filling up tank)
3. Once I can get the engine running, it doesn't matter if its hot or cold, it will start up fast as long as its within a few min.
4. In the morning, while the engine is warming up, the idle feels a bit rough.
5. On long stops like overnight or from work, upon start up, I see white smoke come out from the exhaust that lasts for a second and goes away completely after. (smells like gas)
6. Once the engine is warmed up, the car runs perfectly fine, no stumbles, no smoke, has power, etc.
7. Engine oil level ok, no milky look, no smoke from oil cap. Radiator levels ok.
8. The exhaust constantly smells like raw gas, like it is running rich.

In a nut shell, time seems to be the biggest factor involved in creating this.

Car has 75000 miles, Cobb AP stage 2 w/catted DP.
Perrin turbo inlet, everything else stock.
No CEL at all.

Want to get to the bottom of this.
Any suggestions would be appreciated.
Thanks[/QUOTE\]

If you have ruled out fuel problems
I would check to see if you have a blown head gasket. If the head gasket has a minor leak it can leak into the cylinder overnight (when I see it happen the most) causing a rough start till it burns all the coolant out of the cylinder(s) and could also explain the white smoke in the mornings. The cooling system builds pressure and it could lose the pressure through the blown head gasket. The leak can be so small that it won't overheat or even seem like you have a blown head gasket but big enough that it leaks into the cylinder(s). You could perform a block test which might not come up due to the leak being so small. You can also pressurize the cooling system and with a borescope camera inspect the cylinder and see if coolant is getting into the cylinders.

When I've seen this happen it's one cylinder and the head gasket is blown around the combustion chamber

Good luck my friend. Hope this helped
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Old 05-27-17, 12:23 PM   #25
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Default Re: Start up problem no one can solve...

Maybe a sensor that the ecu looks to for fueling at temperatures below operating is fouled up. Coolant temp? Maf?
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Old 05-27-17, 12:42 PM   #26
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Default Re: Start up problem no one can solve...

Quote:
Originally Posted by 09stihatch View Post
If you have ruled out fuel problems
I would check to see if you have a blown head gasket. If the head gasket has a minor leak it can leak into the cylinder overnight (when I see it happen the most) causing a rough start till it burns all the coolant out of the cylinder(s) and could also explain the white smoke in the mornings. The cooling system builds pressure and it could lose the pressure through the blown head gasket. The leak can be so small that it won't overheat or even seem like you have a blown head gasket but big enough that it leaks into the cylinder(s). You could perform a block test which might not come up due to the leak being so small. You can also pressurize the cooling system and with a borescope camera inspect the cylinder and see if coolant is getting into the cylinders.

When I've seen this happen it's one cylinder and the head gasket is blown around the combustion chamber
I'll go with this one. something got in there . . . and I think we've read of it before?
Not the most common thing thing but so far it fits best . . .
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