Cold Start Up Problem!

[Burrieddreamz]

Hellow everyone,

I hope am posting in the right section of the forum.

I have R33 Series II GTST that has a Front Mount intercooler , Boost controller , Pod filter intake , Bov, Haltech Pro Plus ECU, 3" exhaust , upgraded turbo etc etc.

Now am having trouble with the car during startup. The car takes about 5-10 seconds of ignition.

I have already cleaned intake and throttle body and AAC valve as well.

My R33 has very different throttle body and half of the wires / plugs are not connected.

AAC valve is also different on this car and the wires having no plugs attached to it.

Please see this pictures attached.

Any help will be highly appreciated

thanks

[DVS JEZ]

Has it always had this issue or just started? Is there plenty of fuel getting to the fuel rail?

Does it start with some throttle applied?

Few possibilities is the fuel pump, fuel pressure regulator. With the reg u could try crimping the return line as u are attempting to start it

[Burrieddreamz]

Thanks for the reply

its just the ignition Issue

Nah it doesnt get started by applying throttle its just long long startup!!

Its tuned @14 psi , it was perfectly fine till last week! , I don't know whats wrong I just cleaned intake and sensor thought it could be that.

Should I try replacing a fuel pump ?

BTW it has Cusco Fuel Catch can too (this thing is too complicated compared to one nice stock skyline I imported last year)

[DVS JEZ]

No dont replace anything without diagnosing it first.

What i mean with the throttle is if u hold the theottle open a little when cranking does it start easier or no different

[Burrieddreamz]

Nah man doesn't make it any better same thing

[DVS JEZ]

Ok that tells me it is a fuel supply issue. Try crimping the retun line before starting.

Also take fuel line off before the rail and the amount of flow when priming.

If u are near me i could check it out with my pressure and flow gauge

[Burrieddreamz]

I guess that could have been the problem

Okay let me explain

2 weeks ago I added Nulon Fuel Injector cleaner , Drove car back and then parked ( sunday)

Monday morning 7.20 am I started the car 1 failed attempt

2nd attempt it took about 5 second of starter motor's effort to give me a hope that this thing is going to turn on

3rd attemp was successful

So now after I wrote the reply went to Caltex and got about 20 litres of Vortex ( last time i used BP ultimate)

Car was warm and it started smoothly

so it can be a fuel issue too I suppose

I've got it service like a 1000kms ago and had changed oil filter , fuel filter , pod filter , engine oil (10w50) and other necessary things.

I shall see tomorow morning if it work properly

thanks again for the help mate. appreciate it

am in melbourne and you seem to be pretty far

[D.I.Y. Mik]

Fuel cleaner could have dislodged some crap and its stuck somewhere else now.

Hope its not blocking an injector. that would be bad.

I had issues with my cold start circuit, so i stuffed half a Nerf dart in the pipe. Much better but not fixed.

If you wait for the fuel pump to prime the rail, does it start easier?

[Burrieddreamz]

thanks mate

Yes I know now what the problem was!

It was that crappy Nulon Fuel injector cleaner

I used it 2 weeks ago and since then I had that problem

Yesterday I even cleaned intake of my car and then went for a drive , filled 20 litres of vortex ( last time I used bp ultimate)

and this morning car started normally!

Thanks guys for your help really appreciate it