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Old 06-30-2017, 03:52 AM
tofufi tofufi is offline
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Join Date: Feb 2016
Location: Bristol, UK
Vehicle: 740 turbodiesel
Posts: 38
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Quote:
Originally Posted by ngoma View Post
What about that brake (vacuum break) switch? On mine that was what was causing all the problems. Switch plunger o-ring was gummed up and not quite making good enough seal.
Thanks for the thought

With mine, I've tried connecting the pump direct to the throttle diaphragm (so no brake switches to present problems) and with the pump given 12v to the top and bottom terminals, and the central terminal earthed, the pump still can't pull the throttle.

It just seems the throttle springs are too strong for the pump to overcome.

I've got the same problem on two cars having tried 3 cruise control pumps, 2 injection pumps/springs, and two different throttle reels...

Would you be willing to try connecting your pump as above (just with the connector removed and a couple of jumper leads to the pump from the battery) to see if your pump opens the throttle fully when connected up?

Thanks,
Jim
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