Help, erratic rpm surge

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NJ
#1
My 98 318ti has been acting up the past 2 days. While driving in 3rd gear around 20mph, the rpm kept bouncing into redline back and forth rapidly, but the engine wasn't actually revving as if it was in redline. It went away later in the day, but it reoccured today. The car also stalled once in the middle of a turn. What could be the problem? Could it be a broken speedomter?
 
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my fighting hole
#6
if you open your hood, on the left hand side there is a panel right on the firewall....take a philips screwdriver and remove the panel. slide the computer out and disconnect. inspect the pins for corrosion and if you are saavy enough, open it and check for cold solder joints. not sure where the throttle clips are on a 318 BUT all you have to do is follow the intake up to the throttle body and you will see a metal link that goes to the spring that opens and closes the throttle door. inspect those links and clips....there should be 2 of them
 

epj3

Senior Member
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Lancaster, PA
#7
Also check for water damage (unless bmw had the fix in 1995? I don't remember).

If you think you might work on the car yourself more than just this one time, then you might want to invest in a Bently manual.
 


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