My previous issue was the engine woulds not shut off. Fixed that (several vac leaks)

Now, when the engine is shut off it momentarily rev's up before shutting down. My tach does not work but I would estimate 1000 rpm

Does not rev up on its own when in neutral, returns to idle quickly when reved up (on purpose) and I made no adjustments prior to this development


Any thoughts?

'86 OM602.911 NA

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1982 300sd, new project car to restore

It doesn't matter if you know what you're doing, as long as you look like you know what you're doing.

If your vacuum system is in proper order, than the next best guess is the electronic idle control.

I do not know how you would test this but you have a Vacuum Shutoff Valve on the Steering Colum Lock that is actuated when you turn the key.

Maybe you could test it by applying Vacuum from a different source than the Vacuum Shutoff Valve on the Steering Colum to the Vacuum Shutoff Valve on the Fuel Injection Pump.

If it does the same thing when not connected to the Vacuum shutoff Valve on the Steering Colum; it is a issue with the Vacuum shutoff on the IP, Linkages or the IP itself.

If the problem dissapears there is a good chance it is the Vacuum Shutoff Valve on the Steering Colum.

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84 300D, 82 Volvo 244Gl Diesel

What happens when you use the lever on the IP to STOP the engine? Same thing, or better?

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Cheers!
Scott McPhee

1987 300D

with the shutoff lever it is fine

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1982 300sd, new project car to restore

It doesn't matter if you know what you're doing, as long as you look like you know what you're doing.