Engine run on

[nocrap 0]

Recently when I stop my car (ignition off) it will occasionally do another couple of revs' and I'm unsure as to why, i've been told that this could be a sign of it running rich but the plugs don't seem to indicate this....

 

Could this also be coupled with the occasional reluctance to start, with the ignition needing to go for a few seconds before the engine catches?

 

Cheers

[mattkh 0]

Hi

Check the ignition timing.

[nocrap 0]

mm, too intermittant to be that....if it was a constant issue then yeah, but this really is every now and again say maybe a couple of times a week.

[nocrap 0]

could anyone tell me how the 5th 'cold start' injector is controlled? i.e how it knows to be on or off

[mattkh 0]

could anyone tell me how the 5th 'cold start' injector is controlled? i.e how it knows to be on or off

Hi

It is controlled by the ignition switch.

So it only squirts when you turn the key to crank the engine.

[nocrap 0]

Ah OK, so when the key springs back to normal running position it should then be off?

[mattkh 0]

Hi

Yes. But I have heard that you can have a leaky 5th injector which can cause overfuelling.

[nocrap 0]

Great, cheers. that could be a reason for both problems, with the injector leaking causing over fueling and also not always firing on ignition

[Jim 2]

We could really do with a 2.0 16v 'sensor swap a-thon' one day mate. I've suspected i've got a duff 5th injector and/or thermotime switch for ages! Problem is with the cost of the parts from VW its hard to justify changing them unless you're sure they'll do the job!

[easypops 8]

Hi,

I was told by a so called vw specialist garage that my 5th injector was faulty(while trying to sort the infamous dodgy idle) and they unplugged it and told me it is not really needed anyway.....and they seem to be right.....that is well over a year ago and it starts first time all the time.....i will eventually get round to replacing it.......maybe

[Jim 2]

lol.. the 5th injector is listed on ETKA as a

[easypops 8]

lol.. the 5th injector is listed on ETKA as a

[nocrap 0]

We could really do with a 2.0 16v 'sensor swap a-thon' one day mate. I've suspected i've got a duff 5th injector and/or thermotime switch for ages! Problem is with the cost of the parts from VW its hard to justify changing them unless you're sure they'll do the job!

 

would be good, i'm sure you know that i've got a brand new thermo switch? will bring it with me next time i see ya.

[Toad 0]

I think the 5th injector only sprays for a second or two when it starts when cold. If it's leaking, then unplugging it will not help a great deal.

 

I think I have a spare, and a few 9A sensors knocking around, if you both wanted to converge near here I'd even lend you tools to do the swapping...

[nocrap 0]

Cheers Toad, your a bit out the way though....I'll give the Beigemeister a shout, i'm sure he's got a few 9a bit kicking about.

[Toad 0]

Cheers Toad, your a bit out the way though....I'll give the Beigemeister a shout, i'm sure he's got a few 9a bit kicking about.

 

I thought that might be the case, but it would have been an opportunity to add to the toad-love thread when Jim bent over the bonnet of his car... ;)

 

I'm sure Stu may well have a couple of bits.