VR6 starting......eventually

[Squire 0]

Hi All,

 

I have a problem starting the engine in my VR6 Corrado. The battery is fine, and the starter motor makes all the right noises, but I have to keep the starter motor whizzing away for about 6 seconds before the engine fires into life (and its more of a splutter into life!) It didnt used to be like that. Used to start pretty much on the turn of the key immediately. The problem started happening about 4 weeks ago. It seems to have happened since putting some redex in the petrol tank. It didnt have starting problems immediately after putting the redex in, only after the next fill up (minus the redex). Kinda wish I didnt stick that stuff in the tank now, although surely that wouldve gone from the system now? (filled up with petrol about 5 times since) It just seems a bit of a coincidence.

The car was due a service so i thought i'd worry about it after the service hoping that might solve the problem. The service included changing the spark plugs, and the fuel filter (done at a VAG specialist), and i also had it hooked up to VAGcom which showed no fault codes. The engine still struggles to start however :(

The car drives fine i.e not cutting out, or loss of power. its just firing the engine into life. If I try to start the engine after a run in the car (enough to get the engine up to temperature) , say after leaving it for 5 mins, it will start straight away. But maybe leaving it 10mins after a run, it will struggle again. Like i said it will start eventually. I have noticed a bit of smoke come out the exhaust once she fires up but not everytime.

 

I usually use Vpower petrol, but have tried switching to regular, then back again. It didn't make any difference to the starting!

 

So any ideas please?

 

Cheers in advance!

[andygal 0]

Hey, very interested in this as my corrado that i have just bought has the same problem. Once again i have changed the filtrs, plugs etc and its still the same!!

 

Startng to think it maybe something like a slightly blocked injector?? Not letting enough pterol into the engine when the fuel pump primes??

 

Cheers,

 

Andy

[CrazyDave 0]

Sounds like loss of fuel pressure maybe caused by a dicky fuel pressure regulator or leaking injectors

 

It should hold fuel pressure when switched off but if its leaking past the regulator it'll take a few extra seconds to prime and run correctly.

 

Try switching the ignition on and off 4-5 times before you start up. This will prime the fuel system ready as the pump runs for a second when you first switch on the ignition.