Cold Start Struggle

[GTS900]

Just purchased a '90 model R32 GTST over the weekend. The car struggles to start when its stone cold.

Quick run down of what happens:

Turn the key and hold for about 2 seconds, engine doesnt fire

Turn key again and hold for another 2 seconds

Engine fires but will idle at about 500rpm and sounds like its about to stall

within 3-4 seconds the rpm will rise and idle as per normal.

This is only when the car is stone cold, even if i go for a drive then turn the car off and come back half an hour later it will fire first go. When the car is up to temp it runs perfectly otherwise until its up to temp, its a bit rough.

Anyone have any ideas?? I was thinking it may be a vacume line or something?

Regards,

Ari

[Husky33]

sounds like it's not getting enough fuel on startup.

What fuel pump are you using?

[GTS900]

sounds like it's not getting enough fuel on startup.

What fuel pump are you using?

Standard as far as i know.

[Murry33]

omg i have the exact same problem on my r33 series2, only happens in the morning when cold, fuel pump was checked by mechanic and is completely fine. Someone know what this might be?

*i have new spark plugs, new o2 sensor etc & service done* My mechanic couldn't find the problem.....

Edited December 18, 2006 by NeesaanGTS

[R32_Matt]

i think it is just the fuel pump needing to prime.

mine does the same thing on cold starts.

try leaving the key in the on position for a few seconds before you start it and see if it then starts easier. this gives the pump a chance to prime.

[--{TRYDIS}--]

dude i got the same prob in my 93 r32 gtst type m it does sometimes work if i leave the key on reds for 5 seconds but other times it chokes if anyone finds the reason please tell me its annoying me to the shit house lol .

[discopotato03]

Tired or dirty idle air control valve ?

[Murry33]

i've let the fuel pump prime for ages, does nothing....also had the fuel filter replaced. my mechanic made the cold start idle go higher when cold, so it revs 1000rpm+ but hasn't been helping it start when cold...

[blind_elk]

Get injectors cleaned.

Clean AAC valve.

Check Cold Start air valve.

Check / replace (ECU) temperature sender.

Standard or aftermarket ECU?

[mad082]

check base the timing, clean the idle air control (thats the hard to get to one), get the battery tested, and possibly check the water temp sensor voltages, and possibly try someone elses crank angle sensor.

[SilverECR33]

Clean AAC valve.

Check Cold Start air valve.

Where are these valves?, Id like to check this out, as i got similar issue, and this could probably be fix for alot of our cars.

if it is, we should start a DYI in maintenence on this.

[crack]

Clean AAC valve.

Check Cold Start air valve.

cold start valve

clean aac valve

[Rekin]

I had the exact same problem, car stalled it self once it started. Turned out it was the aac valve. That was cleaned.

Car still chokes but doesnt stall. Fuel pump/injector clean will be next

[GTS900]

cold start valve

clean aac valve

Your a legend thanks for that, i will be doing these over the christmas break. Will let you all know how it goes.

Thanks to all for their imput.

Ari