Won't Start When It's Warm

[Petruski]

Hi there.

I have a Skyline R33 Gts-t that won't start easy when it's warm. Starts perfectly when it's cold.

When it get's a little warm there are heavy black smoke from the exhaust at low rpm when i hit the accelerator. It also knocks on high rpm. There are two error codes on the ECU, One for the knock censors, and one for the temp cercuit. I have changed both temp censors.

What could it be?

The car is standard except from an open air filter and cat-back exhaust.

Petruski, Norway.

[(OO)SKYLINE(OO)]

Black smoke is usualy a fuel thing... Check the usual things like fuel fillter, fuel injectors, injector raling, oxygen sensor, take a look at spark plugs... Knock sensor... What type of fuel you running? The car should be tuned for AUS spec fuel when it get to AUS...

Skylines can do that, like starting the car up after getting warm, takes a few more seconds whilst turning the key to get it started. My mechanic told me its a fueling thing, but didn'd give me the whole story. Its normal but you having a heavy puff of smoke, I'd get it checked out.

[Petruski]

Black smoke is usualy a fuel thing... Check the usual things like fuel fillter, fuel injectors, injector raling, oxygen sensor, take a look at spark plugs... Knock sensor... What type of fuel you running? The car should be tuned for AUS spec fuel when it get to AUS...

Skylines can do that, like starting the car up after getting warm, takes a few more seconds whilst turning the key to get it started. My mechanic told me its a fueling thing, but didn'd give me the whole story. Its normal but you having a heavy puff of smoke, I'd get it checked out.

I drive on 98 octane, and i'm from Norway When the car is warm it could take up to 20 sec to get it started, and if let of the accelerator, it will stop. It seems like there are to much gas coming in to the engine, and therefor the sparkplugs are getting smutty. What can i check for on the o2 sensor? And is it two or one of them?

We don't have so many Skylines in this country, and there isn't any shops that know anything about it.

Thanks for your reply

[(OO)SKYLINE(OO)]

Ah ok Norway LOL! You ppl should have pretty good fuel so thats not a problem.

I'll have to clarify with my mechanic, could might be an ingnition thing too...? Check the alternator...

GTS-T only have 1 O2 sensor from memory, it checks the air/fuel ratio, so the car doesnt not run too lean or too rich.

Quote "When the car is warm it could take up to 20 sec to get it started, and if let of the accelerator, it will stop"

Ok saw my mechanic, from my understranding, ckeck all the the regualr stuff, fuel fillter, fuel injectors, fuel raling, spark plugs, alternator... Should be all good. Then go back to the ECU, if it is saying knock and temp sensors are coming up with errors then thats the starting point = check it out and change both sensors, which I think you said you have done.

Reason for the car having trouble starting up after warmed up is becuz the temp sensor cannot tell / make a reading of how hot the engine is, therefor does not know how much fuel to pump, therefor you having to push your accelerator down to pump the fuel, which leading to your spark plugs getting smutty / flooded.

If you have changed both temp sensors, go back to the fuel injectors, are they leaking / clogged?

If ya done all that and still no good let me know and I ask what else might be the problem...

See how you go.

Edited February 17, 2008 by (00)SKYLINE(00)