Re: E30 325i hard to start when warm

["Allan Williams" <allanw@xxxxxxxxxx>]

Thankyou very much for your advice, just a few more questions for you and
everyone:

***Does our car have a cold start injector? It was made in late '90 and I
thought it used the other 6 (normal) injectors to warmup. If it does have
one, where is it?

*** If the temp sensor to the DME (not the gauge one  - I know about that
:-) was reading wrong we would surely run rich all the time? We get quite
good mileage with this car.

Thankyou very much for all your help. I was hoping to avoid all these
annoying problems on a low mileage car :-(

Thanks!

Allan :-)
http://www.geocities.com/motorcity/downs/9040/
"How do I set my laser printer on stun?"
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- ----- Original Message -----
From: Fadeev, Alex <Alex.Fadeev@domain.elided>
To: <bmw@domain.elided>
Cc: <allanw@domain.elided>
Sent: Wednesday, February 02, 2000 8:21 AM
Subject: RE: E30 325i hard to start when warm


> "Allan Williams" <allanw@domain.elided> asks
> >
> > We have a 1990 325i SE, and it has this small problem-
> >
> > If you drive it until it is fully warm, then shut it off for
> > 20+ minutes, it is hard to start. It cranks and cranks, but
> > doesn't fire. If you hit the gas it will sometimes start,
>
> Allan,
> That is a hint to go on.
> By hitting the gas pedal you open the throttle and let more air in.
> The only time this would help is if the initial fuel/air mixture was too
> rich.
> There may be many reasons for a rich fuel mixture upon warm starts.
> The ones that immediately come to mind would be:
> - your cold start injector is firing erroneously/leaking (check the cold
> start injector and the temp sensor that may be misleading the DME into
> thinking the engine is cold - below 30C)
> - your fuel pressure is too high and too much fuel is dumped into the
> cylinders during warm starts (check/replace the fuel pressure switch)
> - ICV may be acting up and suffocating engine of air
> - ... (any combination of incorrect sensor inputs into DME, or the DME
> itself, that prompt it to flood the cylinders)
>
> alex f
>

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