cold start trouble E30 M3

There is a thing called flood clear mode on injection cars. Engine off, full throttle and crank the engine. That is how you would do a dry compression test with out disconecting your fuel. It works.

M3Nally wrote: Adwo, His theory may be bo~~ocks but it started the car, that was all I cared about.

I can surely understand that!

M3Nally wrote: I have not had any trouble starting since but it is still a bit rough until it's warmed up.

I am betting on a injector not sealing intermittently combined with the gaskets leaking...

M3Nally wrote: I am now armed with carb cleaner, and multimeter and will have a look tomorrow morning before the rain comes down again. Good weekend all

 

Same to you, let us know what you find...

Adwo

the simple solutions are often the best ,its your inlet blocks that need changing , it depends on how your going to drive your car , if it's a every day car and you like to give it some stick then i would change them straight away it won't do your valves or pistons any good running that weak on one or two cylinders .
you'll need to find out what size throttle bodies you have 46mm or 48mm , early cars had 46mm and later cars had 48mm .
munich legands have both in stock , £49.17 each + vat and fitting ..
munich legends 01825 740456

Edited by grant w

Cheers chaps,

If I have an air leak, why do the plugs still look alright? I suspect it's because once it gets warm the leaks seal up and it then runs the right mixture.

I had a look at Gustaves site where he uses paper gaskets from E28/E34 M5 to seal inlet leaks, has anyone done this?

The S14 is very sensitive to intake leaks, you should tend to them immediately. Running lean at 7000 rpm is not something you want to do.

Regarding the M5 gaskets: I tried them but they only work with the 46 mm throttle bodies, otherwise the shape is totally different.

grant w wrote: if your going to bodge the job why go to the trouble to import paper gaskets why not use some silicon sealer just as good if not better or just do the job properly ..

Don't use silicon on the cylinderhead, you will regret it dearly when changing the gaskets the next time.. You can use it between the gasket and the throttle body though. Sparingly!!

Regards,

Adwo

i'm not endorsing the use of silicon i would'nt use it my self , i'd have new inlet blocks fitted straight away , as i found out to my cost on my old engine that had a air leak on a allready lean running engine and it destroyed one of the pistons , the use of silicon is a trick used by racing teams so that they don't have to keep fitting new inlet blocks ...

215DMX wrote: I believe BMW had a service update for this problem some years ago which was to use sealant and NOT to replace the intake blocks - anybody?

BMW replaced my intake gaskets