Rb25 Dont Want To Start...

[Rb Liner25]

Hey all,

When i go to leave for work my r33 wont start, it takes about 4 attempts before it starts and when it does start it runs very rough and coughs and splutter but after about 30 seconds it runs normally.

Can anyone help please?\

Cheers

[Madaz]

could be dry solder joints in your AFM starting to break down

>>DIY Dry Solder Joints<<

[mystery_kid]

a leaking fuel injector can give the same kind of issue

is it only when you come out from work? not in the morning?

[Rb Liner25]

no it does it whenever the car gets cold, when there is no heat in the motor

[Madaz]

have you tried alternative coilpacks

[zebra]

Have you changed the spark plugs?

That would be the 1st thing I would do.

Bad AFM would mean it would run shit the whole time.

Bad coil packs means it would run shit all the time.

[Madaz]

not always

when my afm had dry joints the first time would intermittently break down mainly when cold until it got so bad it would just limp

had coil packs do the same thing break down when cold but get better when hot

[DVS JEZ]

Fuel pressure reg might have gone soft. Try priming the fuel pump a few times then try to start.

See how u go

[Rb Liner25]

primmed the fuel pump 5 times stilll struggles to start, the car goes like a rocket after its started once you get in running it comes good after about 10 seconds of running doesnt cough or limp , it just never wants to start

[DVS JEZ]

Is it stock ecu?

might need the cold start tune looked at

[Rb Liner25]

yeah stock ecu, what $$$ would i be looking at for cold tune?

[Madaz]

you don't need a cold tune as your running a stock ECU

[blind_elk]

This is from the R32 Engine Manual for "difficult to start - engine cold":

1. Fuel enrichment from engine temperature sensor not working (sensor not working at cold)

- disconnect sensor - any difference?

- sensor resistance value?

- sensor voltage value?

2. Idle speed control (AAC) not working

- AAC valve closed?

- AAC valve plug disconnected?

3. Start time enrichment not working (check through CONSULT)

4. Cranking speed too low (sus battery, sus starter motor)

(presumably same or very similar for RB33)

[17psi r33]

hi, had a verry similar problem with my r33 gts, ended up being a leaking injector o-ring, pulled fuel rail on and primed fuel pump to check of any where leaking easy to check and easy to fix if thats your problem, 5 cent part big problem though.