 914-6 w/Bosch MFI? |
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| mightyohm |
 Apr 15 2004, 10:42 AM
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#21
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Advanced Member  Group: Benefactors Posts: 2,277 Joined: 16-January 03 From: Seattle, WA Member No.: 162 Region Association: Pacific Northwest   |
QUOTE(9146986 @ Apr 14 2004, 07:01 PM) The way it works is when the engine drops below a specific RPM it activates the solenoid on the pump to pull back to the idle position. Close. It shuts off fuel on overrun only and restores it when the throttle is released back to the idle stop AND the engine RPMs go below some value (1200 or so). There is a solenoid on the pump that does this and it is activated by the RPM transducer and the idle stop switch. Some people claim the car will backfire on overrun unless you have this system working. I ran with it and without it for months at a time and never really noticed a difference. |
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| michel richard |
Apr 16 2004, 04:46 AM
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#22
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Senior Member Group: Members Posts: 1,291 Joined: 22-July 03 From: Longueuil, Québec Member No.: 936 |
I think that these engines were tuned to run quite a bit leaner than where we run them today. When they were that lean, they would apparently backfire all the time, especially on overun. My has been running a little fat and I have'nt used the overun shutoff either, without a problem.
Michel |
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