Re: rough startup

["Ron Buchalski" <rbuchals@xxxxxxxxxxx>]

Aaron,

What did they check on the fuel injectors?

Based on what you stated, I would guess that you have one or more leaky fuel 
injectors.  After you shut the engine down, the leaking injector(s) will 
pump fuel into the cylinder(s).  If you start the engine relatively soon 
(engine still warm), the excessive fuel will cause the engine to run 
roughly, the O2 sensor will detect the excessive mix and lean out the fuel, 
and finally everything will correct itself.

If you start the car after the engine has cooled down (3+ hours), it will go 
into cold start mode and the excessive fuel will be expected.

Just a guess...

- -rb

>Date: Thu, 26 Oct 2000 11:27:34 +1000
>From: "Leung, Aaron" <Aaron.Leung@domain.elided>
>Subject: rough startup
>
>Hi Guys,
>
>I'm having a bit of trouble with my car. Originally the car I have was a 93 
>E36 318i sedan. About 10 months ago, I had the car converted in to a 318is 
>with a 97 ti engine in it. It all runs fine except for the startup. If I 
>leave the car parked and off for 3 hours plus, then start up the car, it 
>comes up fine, but if I start up the car before then, I get a rough 
>startup. What happens is, the car runs fine for an inital one minute, runs 
>lean for about a minute or two, then the engine comes good.
>
>My mechanics initally thought problem stemmed from the computer not being 
>tuned/dyno. I held off on tuning because I wanted to supercharge the car 
>and change the exhaust in the near future. Now that I have, I'm still 
>having the same problem.
>
>They've checked the O2 sensor, the wiring, the injectors and the fuel 
>filter, but still the same problem.
>
>Does anyone have any ideas what it could be?
>
>Cheers,
>Aaron Leung
>93 318i -> 318is supercharged (c:
>Sydney, Australia

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