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Re: 518i hard to start when cold (archive)
[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]
Posted by John G.Burns on April 01, 1999 at 05:27:22:

In Reply to: 518i hard to start when cold posted by ken on March 31, 1999 at 22:49:02:

: My car is a 518i manual E34 1991 M40/B18 engine.

: I have to turn the key for a long time and accelerate to start the engine. When it is running the engine vibrates and when I accelerate it returns to normal.
: Someone told me it was cold starting valve or is it the injectors which are leaking. The engine makes clicking sound when accelerating or driving uphill.

: Does this car has a cold starting valve or is it another thing is not working well?

I'd bet your coolant temperature sensor has passed away. Not sure if the M40 also has a thermo time switch as it could be that too. On the M20 they were wired in series so either one could cause your problem.

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