Re: E28 accel problem

[Tom Childers <tdc@xxxxxxxxx>]

At 02:29 PM 3/16/99 -0500, Timothy Alan Roebke wrote:
>The acceleration of my 533i has a severe intermittent stumble effect
>when the engine is not fully warmed up.
> When warm, the engine is missing some power which is noticeable - have to
>'stomp' on it to get a clean acceleration.
> The coolant temperature switches have been replaced (thermo-time tests
>fine) Every component in the fuel system has been replaced, as well as
>the cap,rotor, plugs & wires.
> I believe it is an ignition-related problem, but cannot locate it. If
>there is a bad ground, I have replaced the ends of every ground I could
>find. 
> Does anyone have a list of non-obvious things I should check for this ? 

Check the air bypass valve in the fuel injection system, if you haven't
replaced it already.  It is is easy to overlook.
- -tdc

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